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I'm calling it a misfire because of the PO301 code. The brand new fuel injector is getting a pulse, but the PCM is instructing the car not to give fuel to the #1 cylinder at low idle. The misfire is created by the computer which has picked up a problem. The spark plug is definitely good. We swapped it out into another cylinder and it works.

Dec 15, 2016 · Cylinder 5 misfire 6 Answers What would cause a Constant misfire code my valves are good and it doesn't smell like antifreeze the plug is dry can someone help me please 1998 Chevrolet C/K 1500 Silverado Extended Cab Stepside 4WD
Check Engine Light On, P030x Specific-Cylinder Misfire Code. One of the impressive features of OBDII systems is the ability to self-diagnose a misfire and pinpoint which cylinder has the problem. For example, P0302 indicates a misfire on cylinder #2.
Note: Be aware that the #1 cylinder misfire code is a catch all. A good friend phoned me from King of the Hammers last year, sharing that his late (2004) TJ Wrangler 4.0L Rubicon engine would not idle on a hot restart. The code thrown was a #1 Cylinder Misfire.
Re: 5.3 Vortec bank 1 lean and cyl 7 misfire I looked at all the plugs on bank 1 last night, they all looked good except cyl 7, which was black with heavy carbon buildup. I put a good plug in cyl 7 and the dead miss on cold startup is gone, but it is still running rough.
Chevy 4.3L OBD-II code P0306 is generic cylinder 6 misfire detected. In this video we take apart the engine in order to solve this nasty and annoying also...
Engine Misfire - Rough Idle On GM 4.8L, 5.3L, 6.0L Engines Is The 5.3 V8 A Good Engine? Despite its reliability, there are some fundamental issues that this 5.3 Liter Chevy engine has. Misfiring and Noise Noise and misfire seem to be very commonplace for this 5.3-liter engine. These misfires happen as a result of various kinds of Active Fuel ...
Dec 16, 2015 · I have a similar problem with my 08 Silverado 5.3 that also has the active cylinder management system. Number 6 cylinder misfiring, check engine light on, check stability track light on as well. I could feel engine was not running just right so had our mechanic look at it and they narrowed it down to the No 6 cylinder.
Basics Causes of a Misfire Condition. With and Without Misfire Codes. When things are running optimally, each engine cylinder gets its full dose of air, fuel and spark. It's when one of these three (air, fuel or spark) are missing from the mix that the engine in your GM pickup, van or SUV starts to...
Anything outside that range and the misfire went away. During the misfiring event cylinder 3 was the worse followed by cylinder 4 with a few misfires on the other cylinders. Firing order on this engine is 1-6-5-4-3-2. You can see that #3 is right after #4. During the misfire event, all the data was fairly normal.
Dec 20, 2016 · The foundation is a short-block based on a Dart aluminum block, a forged Eagle crank, 6.535-inch Scat rods, and a set of JE pistons with a 1.2/1.5/3.0mm ring set. The compression is a very ...
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  • Dec 01, 2020 · The Chevrolet Powertrain warranty covers most Chevy vehicles for five years or up to 60,000 miles, whichever comes first, although Silverado 2500 and 3500 series Heavy Duty pickup trucks that have a 6.6-liter Duramax Turbo-Diesel engine will be covered up to 100,000 miles (or five years) – they’re designed to work hard day and day out (just compare them to other Chevy vehicles, they’re ...
  • Troubleshooting a misfire condition or misfire codes (OBD II) on your GM 3.8L V6 equipped vehicle (Buick, Chevy, Olds, Pontiac) can be quite a challenge. Why? Because so many different things can cause a misfire (also known as an engine miss or 'dead' cylinder).
  • There are a number of common symptoms of a bad crankshaft position sensor (CKP) that can help you determine if your sensor has failed, including engine misfires, rough idling, stalling, or hard starting.
  • This symptom is diagnosed using the test P0300-MULTIPLE CYLINDER MIS-FIRE. WHEN MONITORED Any time the engine is running, and the adaptive numerator has been successfully updated. SET CONDITION When more than a 2% (1.5% LEV) misfire rate is measured during two trips, or with a 10% to 30% misfire rate during one trip. POSSIBLE CAUSES
  • The check engine light came on throwing code p0305 which is a misfire in cylinder 5. So we replaced plugs, wires and coils on all 8 Cyl. Now it will run fibne for a few days then start to misfire again and the following service messages popped up: Stabilitrak off, traction control off, service stabilitrack, service traction control.

Mechanical Misfire. There are two easy ways to diagnose a mechanical misfire: A Compression Test and an Engine Idle Manifold Vacuum Test. Steady compression readings (10% each) and a minimum of 120 PSI per cylinder, at least 17 inches steady vacuum are needed for complete and smooth combustion. Powertrain Misfire

MISFIRE and TROUBLESHOOTING the ENGINE - CF-106. It is often said that for an engine to run you need fuel, air, and spark. But you also need compression and the correct spark timing. Fuel and air comes from the fuel system and carburetors. Spark comes from the ignition system. Basics Causes of a Misfire Condition. With and Without Misfire Codes. When things are running optimally, each engine cylinder gets its full dose of air, fuel and spark. It's when one of these three (air, fuel or spark) are missing from the mix that the engine in your GM pickup, van or SUV starts to...
The 265 cu in (4.3 L) "Turbo-Fire" V8 was the second Chevrolet small-block; the first Chevrolet V8 was produced from 1917 to 1918. Designed by Ed Cole's group at Chevrolet to provide a more powerful engine for the 1955 Corvette than the model's original " Blue Flame" in-line six, the 162 hp (121 kW) 2-barrel debut version went from drawings to production in just 15 weeks. Some 6.0L vehicles may exhibit a misfire, lack of power, buck/jerk, excessive smoke or crank/no start. There are several potential causes for these symptoms. If normal diagnostics lead to an injector concern, use the following diagnostics to confirm the cause of injector failure and/or to rule out other conditions which may cause the same symptoms as a failed injector.

cylinder misfire is occurring. By monitoring variations in the crankshaft rotation speed for each cylinder, the ECM can detect individual cylinder misfire events. P0306 CHEVROLET Cylinder 6 Misfire Detected (With Video) Page 9/23

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May 05, 2017 · Tahoe & Suburban DIY and Useful Threads - 2009 Subruban LTZ Misfire/Cylinder Problem - Good evening all, greetings from Lake Havasu City, AZ! I have a '09 Suburban 1500 LTZ with the L76 6.0L/V8 engine that I'm having a great deal of problems with right now.