At Fixya.com, our trusted experts are meticulously vetted and possess extensive experience in their respective fields. Backed by a community of knowledgeable professionals, our platform ensures that the solutions provided are thoroughly researched and validated.
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?
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
Could and most likely could be either. Use premium fuel and Sea Foam to help clean injector. I really haven't had much trouble with coil-overs - but they are all the same and you could switch a couple cylinders around to see if misfire moves.
Remember, it could also be a compression issue. Anything that effects the fuel to air ratio in the cylinder. Depends on just how many miles and abuse the car has had on it
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.
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.
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.
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.
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.
×