Chevy 350 Weak Spark

HOWSTUFFINMYCARWORKS 595,245 views. Joe Hunt Magnetos uses only the finest "Rare Earth" magnets to drastically improve spark to your engine. The iridium spark plugs are efficient but their advantages can only be seen on a sports bike that too on a race track where every millisecond is important for a normal day to day usage it has zero advantages over normal. is your oil change up to date, are u running a 5 weight oil? whats your miliage? the starter could be getting old. • Platinum-tipped original equipment spark plugs have a typical service. However, a diesel engine requires very high compression, usually 350 psi or more because it relies on this compression process to ignite the diesel oil. 1993 Chevy 350 5. These have the fantastic platinum electrodes. This happens when the ignition coil or module becomes too hot. com FREE DELIVERY possible on eligible purchases. Okay so by the end of this week I'm going to be the owner of a 1991 Chevrolet Caprice. Save up to $3,847 on one of 852 used Chevrolet Sparks near you. Spark color determines virtually nothing. DIAGNOSE – ENGINE IDLES TOO HIGH. The Hot-Spark electronic ignition conversion kit replaces breaker points and condenser in the distributor to provide rock-solid reliability. Easy to use parts catalog. These Edelbrock marine cylinder heads include severe-duty, 1. but now, it will not start. Ignition Systems Guide for Big-Block Chevy Engines According to some trendy types, you can never be too rich or too thin. chevy 350 no spark Chevy 350 no spark I have changed the coil, cap, and rotor. See our Cylinder Heads - Quality Performance Aluminum Street Heads. By Tom Benford. Plugs can be re-used after a thorough cleaning. IGNITION TIMING Most engines (except diesels) use an electric spark to ignite a fuel/air mixture. This Site Might Help You. If the engine has a distributorless ignition, the ignition coils must be disabled to prevent them from firing. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Although all four of Chevrolet's siblings of the period (Buick, Cadillac, Oldsmobile, and Pontiac) designed their own V8s, it was the Chevrolet 350 cu in (5. Reader Question My fiancé’ bought a 1994 Chevy 3/4 ton 4×4, 5. However, the source. No Start Test 2: Checking for Fuel. Sorry but this is going to be a long one! Short version: Truck died and won't restart. I changed the coil and checked the rotor and cap, they look ok. He is saying that it has spark but it is weak after the intitial spark and then randomly has a good spark and will 'cough' a little, never enough to start it. i change plugs and nothing happened. All you need to make a spark is a battery, a coil, and the points. I ran a 12volt jumper from battery to the coil and still no spark. With the Hot-Spark electronic ignition, dwell and timing are always spot-on accurate. If a normal spark occurs, then the problem is most likely not in the ignition system. DefinitionA spark plug has two electrodes at the very bottom of it -- a ground electrode and a center electrode. it has good fuel pressure but the spark is weak tested it with a spark tester and it is orange to yellow in coller like a weak coil does this year chevy have any oth … read more. Engine cranks fine, with intermittant firing: If there is a strong fuel smell, either in the. it starts up fine when its cold (And its not the starter/battery) but after you drive it for awhile and get it hot, and go to restart it, it takes a minuite to start it back up. then i pull the coil wire from the cap and check it same thing. I ran a 12volt jumper from battery to the coil and still no spark. 3L is one of the most common engines on the road in America. If you're old Ford doesn't fire up you might be experiencing Ford ignition module problems. Troubleshooting an HEI distributor doesn't have to be hard. Installed engine and everything is. 1 cylinder at the front. CHEVY V-8 SBC AND BBC MSD HEI DISTRIBUTOR. Jointly developed by Chevy and Buick, it is also referred to as the CBC (Chevrolet-Buick Combined) 350. I also changed the - Chevrolet 1989 C1500 question. The intitial problem was the engine turned over but wouldn't start. Overall, this is the great spark plugs for your Chevy 350 engines. Running this type of plug wire will cause a loss of voltage to the spark plugs. When a vehicle will not start, misses often or stalls frequently, its. The 2016 Chevrolet Equinox is nearly 16 feet long and has a curb weight of 3,777 pounds with the four-cylinder engine and 3,922 pounds for six-cylinder models. it is a GMC '89 chevy 1500. Checking The PassLock Anti-Theft System for Problems. This happens when the ignition coil or module becomes too hot. Since a racecar spends most of its time in the 6,000 rpm and higher range, it requires an intake that has an rpm range that reflects that situation (i. A ballast resistor may also be included in this system. Engine Cranks But Won't Start What's causing the no-start? All engines require three things to start and run: spark, fuel, and compression. There are some ways to know when the ignition coil is going bad. With ignition On, turn the engine pulley CW past the TDC mark. More details about this are below, but you might want to download your Chevy manual to help. Any malfunctions in this setup could be a result of ignition coil failure. A bright blue spark is best. Running this type of plug wire will cause a loss of voltage to the spark plugs. Has a machined base for an accurate fit and includes cap with brass terminals for improved conductivity, rotor, and high-RPM control module. k This is often caused by over advanced ignition, timing, poor engine cooling system efficiency (scale, stoppages, low level), a very lean air/fuel mixture, or a leaking intake manifold. Adjust the #3 exhaust valve. See if you actually have a weak spark at the coil. If the engine is not making noise (i. Check yours to make sure they are the proper. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Any input would be. Small Block Chevy Valve Adjustment Order; 0 deg TDC, both number one valves shut. Since then it has grown to be a leader among full size Chevrolet K5 Blazer. The 265 cubic inch engine was only available on B-body cars. Ideal for points or electronic ignition. the spark was weak with bright orange/red not blue. The Spark is Chevrolet's most affordable passenger car, positioned below the Sonic, Cruze, Malibu, and Impala. Any auto parts store with have one. (which calls for hot plugs that resist fouling) yet be capable of extended WOT operation (which calls for cold plugs and maximum heat transfer to the cylinder head). Wet, oily deposits. With ignition On, turn the engine pulley CW past the TDC mark. The original 4. Orange and yellow come from particles of sodium in the air ionizing in the high energy of the spark gap. No matter how strong your engine is, you won't get the most out of it without a good spark. I had an oldstyle spark tester on me (one of these) and I couldn't get it to spark at the standard distance (. This part is essentially an induction coil and, simply put, a high voltage transformer. Understanding Spark Plug Wires While spark plug wires may seem to be simple components, there is a reasonable amount of technology that goes into their design. the compromise. I distributor. There is even less energy available to keep the spark plug lit and turn the fuel into power. CASE 2: If you got NO spark from all of the spark plug wires: This result doesn't condemn any specific component just yet. 1988 Chevy Truck V8 Four Wheel Drive Automatic I wondered if anyone could help me with a question that I can not seem to get a answer to. In a vehicle, an ignition coil converts the 12 Volts of power from the battery to the thousands of volts that are needed to fire the spark plugs. 7L) and 265 cubic inches (4. org member Jay_rich for winning December’s Car of the Month, as voted by ThirdGen. However, the source. Craigslist - Vehicles For Sale in Crestline, CA: Certified 2017 Chevrolet Equinox FWD in Riverside, 2003 Suzuki QUADSPORT Z400 in Eastvale, 2004 BMW R 1150 R in Apple Valley, 2004 Suzuki GSX R 1000 in Fontana, 2014 Harley Davidson STREET GLIDE in Riverside. If any one of these isn’t there, you aren’t going anywhere. I change the oil every 2,500 miles, keep the ignition system updated (plugs, distributor cap, rotor, etc. The ignition coil must then disabled or the high tension lead grounded. they are cheap and makes checking for spark much easier. Tuned the engine completely (new spark plugs and wires, new points, condenser, rotor, distributor cap, spark plug wires, and coil). The spark plug wires, for instance, can break down in a variety of ways that will cause a vehicle's Check Engine light to come on. What are the symptoms of a faulty pickup coil (inside the distributor) or is this more likely just an ignition maintenance thing where I just need to replace cap and rotor. Re: volvo penta (chevy 350) won't start/very weak spark Based on what I'm getting for voltage readings at the coil and looking at my Seloc manaul I think I have it narrowed down to the ignition module or a bad ground in the distributor. Well, without a spark, your car won’t start—or go anywhere. the throttle body is dumping fuel into the motor. 7 Chevy silverado 2 of my spark plugs are fouled with gas I changed coolant temp sensor it didn't fix it help please it's rough idle fouled spark plugs with gas miss plugged to computer says miss on cylinder and o2 sensot. 7 AT Newly installed GM crate OEM motor 2 mos ago New Optima yellow top battery Alternator and starter are new New plugs, Taylor 8. One way to detect a misfiring engine is by sensing the Corvette's engine. the engine will turn over 3 times and then spark. Good spark. I googled it, and came up with 08 degrees BTDC (before top dead center)for a '79 350 Chevy. Why should an engine that has everything right still refuse to start. The new spark plug, P/N 12571164 with AC Delco P/N 41-985, is gapped to 1. / Chevrolet / C/K 2500 / No spark 0. GMPartsNow. Why Won't My Engine Start ? You just finished building an engine or are reviving one that has sat for a while and now it simply will not start. (which calls for hot plugs that resist fouling) yet be capable of extended WOT operation (which calls for cold plugs and maximum heat transfer to the cylinder head). Categories: American Classic Cars | Muscle & Pony Cars Cars need maintenance, there's no question about that. An all-new clean sheet redesign of General Motors' Chevrolet and GMC brand C/K-Series pickups debuted in mid-1972 for the 1973 model year. No Start Test 1: Checking for Spark. I ran a 12volt jumper from battery to the coil and still no spark. Checking for spark is easy to do. See also the section on intermittant firing below. CAP ,ROTOR, Driving around the samething {dash lites up service engine soon } it RANDOM missfires and shakes loosing power. i am not running posi yet but went to. Crank the engine and look for spark. Jointly developed by Chevy and Buick, it is also referred to as the CBC (Chevrolet-Buick Combined) 350. Find out how to test for issues in an HEI distributor with the help of Performance Distributors. hey guys hope you can help. Reader Question My fiancé' bought a 1994 Chevy 3/4 ton 4×4, 5. If the weak cylinder now contributes, the poppet valve for that cylinder should be suspect. I change the oil every 2,500 miles, keep the ignition system updated (plugs, distributor cap, rotor, etc. I changed the coil and checked the rotor and cap, they look ok. Checking The PassLock Anti-Theft System for Problems. However, for most garden pulling tractors, a stock ignition system that's in good condition will provide plenty of spark. There are many issues that can come from bad spark plugs. My first thought was ICM but he has replaced that along with , coil, cap, rotor and wires. i change plugs and nothing happened. A ballast resistor may also be included in this system. I verified that my ignition coil is providing plenty of spark to the distributor (I verified), but I am getting no spark at all to any of the plug wires. 7L pick up, van or SUV is not that hard. You'll see the spark pulsing inside the tester as the engine turns over. Note that the cylinder number 1 is the next driver in front of the engine (the same location on all V-engines) or just the first behind the power steering pump. 97 vortec weak spark from the coil no sprak from distrubuter - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. This can be seen by a sporadic miss when the engine pulls under a heavy load or the vehicle has to climb a hill or steep mountain pass. Common cause for many electrical problems - Install yourself! - FREE tool included with instructions to install without removing lock from dash. I have fuel out of injectors, power to the coil. The 265 cubic inch engine was only available on B-body cars. com FREE DELIVERY possible on eligible purchases. Wet, oily deposits. Mild or occasional detonation can occur in almost any engine and usually causes no harm. The date code the engine was manufactured was also cast into the block. Checking The PassLock Anti-Theft System for Problems. Since a racecar spends most of its time in the 6,000 rpm and higher range, it requires an intake that has an rpm range that reflects that situation (i. the engine will turn over 3 times and then spark. I also changed the - Chevrolet 1989 C1500 question. Are Your Spark Plugs Trying to Tell You Something? If your vehicle has a little less spunk lately, it might be time to change your spark plugs. IGNITION TROUBLE SHOOTING - IG-106. In 2008, for example, the 5. Engine Storytelling. One of these components is the electronic spark control module, commonly referred to as the ESC module, or the ignition module. A new spark plug has been released for use in the above vehicles. I only check one wire, I suppose it's always possible that the distributor contacts for some other wire have failed, but even if only a one or two of the spark plugs are getting spark, the engine should attempt to fire. Ground the threaded part of the spark plug to the engine block. A brief intro so that my current project does not turn anyone off, I will be restoring my fist car once the current project is complete (resto starts. Troubleshooting techniques fall into two categories, depending on the nature of the problem. Ignition Systems Guide for Big-Block Chevy Engines According to some trendy types, you can never be too rich or too thin. With the best in magnetos and accessories, we offer a full line of parts and accessories including ignition system wires, billet side covers & magneto kits. Wiki User Asked in Chevy 350, Chevy S-10. Chevrolet Equinox replacement car remotes and remote covers for less. If there is no spark, or weak spark, verify the following: • 12 Volt switched ignition power to the coil. Last night I actually held the spark plug wire in my hand while engine is cranking and I can feel a very weak spark but its not enough to fire a spark plug. 5 volts in "Key On" position and 11. What You Need to Know About Engine Misfires. Well, without a spark, your car won’t start—or go anywhere. The Turbo-Hydramatic or Turbo Hydra-Matic (THM) series was developed to replace both the original Hydra-Matic models and the Buick Dynaflow. The injector pulse is directly related to the engine speed sensor input (CRK, PICK-UP, etc. 1994 Chevy G20 van no start/stumble/stall. The truck has 135,000 miles on it, but has never given me any problem. How to Connect a Tachometer to the Chevy 350. Of course, if you get one of the store "experts" like they hire these days who only knows how to look up specific cars in the computer, you might be in trouble. There is an old adage saying, "90% of all carburetor problems are electrical". The 2015 Chevy Silverado 1500 is now available with the same basic 6. Although I recommend a few quick tests before you replace the part, if your distributor mounted ignition module looks like the image on the right you probably just found your failed component. Another potential cause is heat and vibration, which can damage the ignition coil's windings and insulation. A narrow gap gives out a weak spark, and a wide gap may prevent a spark from getting fired. As you'd expect of a car with less than 100 hp, acceleration is weak with. All of these parts are subjected to a lot of wear and tear, thanks to the intense electricity passing through them. Get Bulk Power online with fast and free shipping. If you're old Ford doesn't fire up you might be experiencing Ford ignition module problems. The heat range of a spark plug is often in its part number, and the spark plug is designed to run at that range. HOWSTUFFINMYCARWORKS 595,245 views. if it is an older chevy,it could be weak vaccum to your timing. CASE 2: If you got NO spark from all of the spark plug wires: This result doesn't condemn any specific component just yet. Useless for any road bike. I have a '95 K1500 with a 350 that only sparks when it wants to. If there is no spark, or weak spark, verify the following: • 12 Volt switched ignition power to the coil. And when it comes to older cars and classics, well in many cases, they need even more maintenance, having at some point suffered from the ravages of neglect. And still you pull the spark plugs out and they are black as an ace of spades. There should be about 12-12. You cannot receive a refund if you have placed a ShippingPass-eligible order. As for slow turning. Like all PONTIAC engines since 1955, the firing order sets is: 1-8-4-3-6-5-7-2, all by turning it counterclockwise. this is a 98 chevy PU 350. Chevy Distributor HEI Ignition SBC BBC 305 350 400 454 Small Block Ready To Run (Fits: 1965 Chevrolet Corvette) High Performance Spark Plug Wire Set For SBC BBC HEI 305 350 454 Ford Chevy 8MM. See the process and. I was told the distributor is the problem, is this true? In order for any vehicle's ignition system to work smoothly, the engine distributor should be operating at maximum efficiency. If a good spark is present, the problem is probably not in the ignition system. / Chevrolet / C/K 2500 / No spark 0. Attaching some numbers to this, an HEI system can arc a spark plug for 2ms and 20 degrees CA. Overall, a weak—or lack of—spark due to a bad wire, or another failed ignition. So the spark is controlled by the start and stopping of current to the coil. MechanicAdvice) submitted 4 years ago by FBGM115 it cranks over fine but 9 out of 10 times it wont start and if it does start and i drive it around it will stall when i come to a stop. Made absolutely sure of the TDC, 7. So you know your battery is good and the starter works OK because the engine turns when you try to start it. 1990 Chevy Silverado - turns over, but won't start so I bought a 1990 Chevy Silverado with a 5. engine cranks, no spark (SBC 350) Engine & Drivetrain. I have a 1988 Chevy 350 TBI K1500 truck and need to know could a defective ECM cause it to have no spark. As for slow turning. thecjdennissociety. my 1995 chevy with 5. I change the oil every 2,500 miles, keep the ignition system updated (plugs, distributor cap, rotor, etc. But spark plugs can break off, particularly in engines that have been sitting for long periods of time. To put it simply, it creates the spark that amps up the voltage in your pickup. The engine serial number includes a production sequence number starting with 0001001 and one of the suffixes below. use bigger cables and make sure the battery is fully charged. Typically spark plugs are not difficult to remove as long as the plugs are replaced on a regular basis. Re: No spark from coil chevy 350 If you grounded the neg terminal of the coil to the battery or the block. Just bought a '94 G20 Chevy van with a 350 TBI, ran great a few days then started stalling at stops. How to Connect a Tachometer to the Chevy 350. I also changed the - Chevrolet 1989 C1500 question. However in terms of high-RPM function, it falls well short of ideal. The spark plug gap adjustment should not be changed more than 3 times and should not exceed. How to find Top Dead Center TDC when you remove and install a Distributor or unplug Spark Plug Wires - Duration: 7:45. they are cheap and makes checking for spark much easier. If you have installed a Fuel Injection system in your vehicle and are having some initial issues here is a quick checklist to work from to get you started. Attaching some numbers to this, an HEI system can arc a spark plug for 2ms and 20 degrees CA. plug in at the coil none. The 2019 Chevy Blazer is coming soon to showrooms for the 2019 model year. The most common causes are in the ignition (for example, a bad ignition coil) or fuel system (for example, a clogged fuel filter). How to Test an Ignition Coil. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. i change plugs and nothing happened. Guys running a high performance HEI Distributor in my 72 Nova SS 350 Engine. New gas with sta-bil new fuel filter. 5ms and 10 to 15 degrees CA. The most common reasons for an Ignitor not to work are low voltage or a bad ground (earth). Enough to turn it over, but not enough to really crank it good enough. ive checked all fuses and relaysI just cant figure it outand by no spark I mean anywhere coil plugs. Where Was the 2016 Chevrolet Equinox Built? The 2016 Chevrolet Equinox was built in Ingersoll and Oshawa Ontario, Canada, and in Spring Hill, Tennessee. i get spark, but its really weak. The injector pulse is directly related to the engine speed sensor input (CRK, PICK-UP, etc. Maybe this seems too obvious, but an engine needs a spark, fuel and compression to turn over. These have the fantastic platinum electrodes. There is an old adage saying, "90% of all carburetor problems are electrical". You might have spark that is hard to see, but dont have fuel. plug in at the coil none. Easy to use parts catalog. The 265 cubic inch engine was only available on B-body cars. 7 wont start. Any idea's?. No spark in plugs,350,5. Weak sparks are orange or red and may be hard to see in daylight. Founded in 1925, Berger has long been a prominent Chevrolet dealer, and one of the largest Chevy Parts suppliers in the US. It is stil possible that spatk is weak enough to not spark under compression in the engine. I have fuel out of injectors, power to the coil. 3L is one of the most common engines on the road in America. RE: Chevy 350 Small Block Hard to Start When Engine Is Hot? I have a 84' Camaro with a chevy 350 small block with a edelbrock carb, aluminum intake and stock mechanical pump. Useless for any road bike. Adjust the #5 intake valve. Contemporary Manufacture-Wiking 53702 H0 SCANIA 144 Plan Curtain - Trailer newexco redterdam inovp 1 87 ogycvt1960-first-class service - www. What you found is not necessarily a weak spark. These have the fantastic platinum electrodes. How to Connect a Tachometer to the Chevy 350. These trucks are notorious for bad fuel pumps. then i pull the coil wire from the cap and check it same thing. The use of a engine ignition analyzer to check the condition and output of the ignition system can confirm if the ignition system has enough spark output to handle the extra ignition output needed. Model specific subject matter experts, classified ads and more. You'll see separate coils. The age old question of whether or not a spark plug can really increase the performance and economy of a vehicle has raged on for years. With the best in magnetos and accessories, we offer a full line of parts and accessories including ignition system wires, billet side covers & magneto kits. 6 litre cars. How to find Top Dead Center TDC when you remove and install a Distributor or unplug Spark Plug Wires - Duration: 7:45. GM Performance Parts designed our Fast Burn aluminum performance cylinder heads for small-block applications just like our Fast Burn 385 turn-key crate engine. I have a 1986 Chevy c/10 with the 305/5. This can be seen by a sporadic miss when the engine pulls under a heavy load or the vehicle has to climb a hill or steep mountain pass. What part of it gives out the spark? Is it the Coil? And for the module, does that only control the rpm range? i Just built a 350, and it wont start. CAP ,ROTOR, Driving around the samething {dash lites up service engine soon } it RANDOM missfires and shakes loosing power. To test and fix possible problems, check out our Small Engine Ignition Systems FAQ. Ya know the old saying about not fixing what ain't broke? I think spending the dough for 110 octane is overkill for your setup. by Sean Szymkowski — Nov 13, 2017 ; Sponsored Links. I'm not up on the Chevy HEI stuff, can the coil weaken before it goes out? or is the weak spark (yellowish) because of the module?. The heat range of a spark plug is often in its part number, and the spark plug is designed to run at that range. Truck will crank but will not start? Truck will crank but will not start? I have a 97' cavalier 2. I have a problem with a 98 Chevy 4x4 5. The Turbo 350 quickly become known for its strength, versatility and compactness. This is a common problem spot. Low Voltage and /or Bad Ground We occasionally get Ignitors sent back from customers as faulty. 1990 Chevy Silverado - turns over, but won't start so I bought a 1990 Chevy Silverado with a 5. When replacing the spark plugs, it is important to make certain the proper gap specification is used. Fault: worn bores/piston rings or valve guides; sometimes occurs (temporarily) during running-in period. 5 wires, new cap and rotor All was well after install Recently engine began stumbling and then just quit running Engine will crank but will not f. I had the spark plugs and wires replaced last month and the shop used the more expensive heat resistance spark plug wires. Weak sparks are orange or red and may be hard to see in daylight. 7l misfires at high rpm and when its not warmed up yet? Spark plugs and / or wires. I had it happen on my '94 GMC Sierra 3500 Xcab with a 350 SBC. Then repeat the test. So here are some simple steps you can take to nip. 7 Vortec that I think I've figured out. It is stil possible that spatk is weak enough to not spark under compression in the engine. 7 wont start. i ran a comp test on all the cylinders and number 2 has the highest at 165 the rest are between 150 and 155. Probably way out of time when the new distributor was. Pre-ignition is caused when a spark plug is so hot, that it begins to glow and ignite the fuel-air mixture prematurely, before the spark. This electric spark has to happen at exactly the right time or the engine will not run properly. 7L Vortec used to start as soon as you bump the key, and now it is hard to start (mainly when its cold) it takes several cranks of the engine to start and after truck warms up its okay, usually in the morning or if the truck sits for several hours after running. Per se, other than corrosion resistance, there really isn't any big differences between spark plugs intended for inboard or outboard engines and car engines. The new spark plug has an Iridium tip instead of the current Platinum tip. A clean, white insulator firing tip and/or excessive electrode erosion indicates this spark plug condition. Edelbrock is the most respected name in performance. No spark - I have a 91 silverado k2500 it stared and ran then i changed the steering column now im not getting spark. A threaded shell at the bottom of the spark plug allows it to be screwed into a vehicle’s cylinder head, and the very bottom tip of the spark plug actually extends partway inside the combustion chamber. Your vehicle has incorrect spark plugs. Weak spark on HEI ( yellowish spark) - Chevy Message Forum - Restoration and Repair Help. Enough to turn it over, but not enough to really crank it good enough. org members. Symptoms of Faulty Ignition Coils. 2020 Lexus RX 350 and RX 450h Review: Pura Vida. org member Jay_rich for winning December’s Car of the Month, as voted by ThirdGen. • Many spark plugs have a service life of over 20,000 miles (32,000 kilometers). discover all the facts before purchase. If you're old Ford doesn't fire up you might be experiencing Ford ignition module problems. 008" in either direction. This article will focus on the process of converting our 1977 Chevy Nova test vehicle from the very functional and affordable GM TBI fuel injection hardware to a much more modern multi-port fuel injection (MPFI) design utilizing a Holley Stealth Ram MPFI Intake and the same MegaSquirt-II EFI system we’d previously installed in Part 1 and Part 2 of this Carb-To-EFI. IGNITION TROUBLE SHOOTING - IG-106. com is owned and managed by Berger Chevrolet of Grand Rapids, MI. Produces strong, blue spark at the plugs. Re: volvo penta (chevy 350) won't start/very weak spark Based on what I'm getting for voltage readings at the coil and looking at my Seloc manaul I think I have it narrowed down to the ignition module or a bad ground in the distributor. 97 vortec weak spark from the coil no sprak from distrubuter - Answered by a verified Chevy Mechanic We use cookies to give you the best possible experience on our website. 1977 was defined by the Blazer, Suburban, C/K 10, C/K 20, C/K 30, LUV car lines. Troubleshooting Ignition Problems on a Mercury Outboard If there is any water on the spark plug, check for leaks. Standard Spark Plug Conditions: An examination of used spark plugs can reflect the accuracy of heat range application. DefinitionA spark plug has two electrodes at the very bottom of it -- a ground electrode and a center electrode. The advantage of inductive ignition is its long spark duration and good spark energy.