Question about 2003 Chevrolet Venture Passanger

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03 chevy venture with cylinder two misfire. replaced plugs and wires, coil, and fuel injector, total tune up, and ran sea foam thru it twice. Dunno what else it could be?

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  • Chevrolet Master
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Could be a burned valve. Run a compression test. If you need instructions or have more questions, please let me know.

Posted on Oct 13, 2010

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Cylinder 3 misfiring on a 97 gmc jimmy 4wd. Did a tune up about 2 months ago (ignition, wires, coil, spark plugs), replaced fuel pump last week, used fuel injector cleaner, still no luck...any ideas?


go back and check all the plugs, wires and the total tune up. check your firing order, and timing. put a timing lite on the plug wires and if the plug is bad it will show with the light. lol.

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1996 GMC 5.7 misfire code cylinder 1 only when cold


Faulty or clogged fuel injector.Check wire harness connection and have injectors cleaned.

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1998 chevy venture has electricity arcing across the harmonic balancer


The coil pack on these engines runs hot, so it's important to make sure there is heat sink grease under the coil to transfer heat. If the coil module gets too hot, it will fail.
If an engine is hard to start or has a misfire at higher speeds, the problem may be a weak coil, a bad plug wire, or a fouled or worn spark plug. On 1996 and newer vehicles, you should get a cylinder misfire code. A code for one cylinder would likely indicate a fouled plug, bad plug wire, or possibly a clogged or dead fuel injector, or a compression leak (burned exhaust valve). Misfire codes for two cylinders that share a coil would likely point to a bad coil.
Another way to figure out if a misfire is a bad coil is to swap two of the coils on the coil pack. If the misfire moves to the new cylinders, the problem is the coil. If the misfire remains in the same cylinders, the coil is OK and the problem is the wires, plugs, injectors or compression.
If you test a coil with an ohmmeter, the test specs are 0.5 to 0.9 ohms for the primary terminals under the coil, and secondary resistance of 5,000 to 8,000 ohms at the high-voltage terminal.

Dec 18, 2010 | 1993 Honda Accord

1 Answer

Hard to start and has a code p0304 for cylinder 4 misfire


have you changed out plugs or wires recently? if not its possible that these are original and that you need to replace them, now just take a quick look at the coil tower post for the number four cylinder, sometimes the post and the inside of the plug wires will be dirty or corroded and also re-seat the plug wire on to the #4 plug it might just have a bad or dirty connection. If this is a fuel injection system then go down to Autozone purchase a can of Sea foam ($10) just bot mine yesterday.. and fill up gas tank half way, then put in can of Sea foam drive it around for about 20 minutes and get on it ever so often, drive safe though please.. you might get lucky and it might just be a clogged injector. Can i get a very helpful thanks!

Apr 08, 2010 | 1996 Chevrolet S-10 Pickup

1 Answer

Has a 6.0 L with bad misfire under a load and is


Hi Brad,
I ran into the same problem your going thru,
swapped cylinder plug and wire ,and the scan kep telling me it was still seeing the problem on the same cylinder,
smoked it too,nothing made sense!
Until i took the whole fuel rail off carefully not to let the fuel run out all over the engine,Had a white rag folded up and handy,tilted the rail assembly and left the fuel run on the cloth,OMG! the rust that came out of there,
I pulled every injector out of the rail,cleaned the inside of the rail with air pressure and carb cleaner.
Its when I was checking the injectors that I found the culprit,the rust pieces had made it thru the injector but were trapped in the screen of the injector!
I hope this cures your.

Dec 10, 2009 | 1999 Chevrolet Silverado 1500

1 Answer

Misfire on #3


Re: 2000 Volvo S40 L4 1.9 Liter L4 1.9 Liter Turbo FI

Are you consider yourself a handy person?

Swap the coil and see is the misfire going to follow to another bank of cylinder.

You has total of 3 coil in your engine.

Do a detail record map and switch the two coils.

A replacement aftermarket coil is oil $46 w/one year warranty and $55 will get you a life time warrent coil.

Do the swap and see what happen.

A leaky/failing injector can also cause the same problem.


Do a Chevron Techron fuel injector clean ran and highway ran.

Good luck

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Have your intake manifold o rings replaced. it is most likely that it would be a vac. leak. and the engine monitor cannot properly diasgnose this problem and having you replace 1000$ in parts and never find the problem.

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2003 Chevy Venture misfiring


The injector is a good possibility, although you should check for spark in the wire first, as the electrical is the weakest link in the system. Put a spare plug in the end of the wire with the plug resting on metal, then have someone crank the van to see if you have spark that far, test and replace spark plug, (do not get shocked!) then look into a new injector or a good cleaning.

Dec 22, 2008 | 2001 Chevrolet Venture

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