HELP!! # 5 Misfire
Posted: Fri May 24, 2024 2:20 pm
2002 Chev Astrovan 4.3 AWD 109500 miles.
Hi Guys,
I really need your help! The van runs GREAT when driving along. But, after idling for a couple of minutes it throws a P0305 code that says cylinder 5 is misfiring. If I drive on highway for hours no codes at all. My OBD 2 reader shows misfiring at idle but as soon as I rev it up to around 1200 RPM it stops misfiring. Below is what I have done to try to correct it.
New Spark plugs and new wires. No help
New ignition coil. No help
New dist. Cap and rotor. No help
Put a different Dist. In, tried that, and didn’t help.
Changed the # 5 fuel injector, that didn’t help. Changed it again, that did not help.
Compression test showed 120 to 130 psi for all cylinders.
Did a leak down test, was in spec.
Installed new crankshaft position sensor, did not help.
Any Ideas and suggestions to what I should do next?!
Thanks in advance,
Andy R
Hi Guys,
I really need your help! The van runs GREAT when driving along. But, after idling for a couple of minutes it throws a P0305 code that says cylinder 5 is misfiring. If I drive on highway for hours no codes at all. My OBD 2 reader shows misfiring at idle but as soon as I rev it up to around 1200 RPM it stops misfiring. Below is what I have done to try to correct it.
New Spark plugs and new wires. No help
New ignition coil. No help
New dist. Cap and rotor. No help
Put a different Dist. In, tried that, and didn’t help.
Changed the # 5 fuel injector, that didn’t help. Changed it again, that did not help.
Compression test showed 120 to 130 psi for all cylinders.
Did a leak down test, was in spec.
Installed new crankshaft position sensor, did not help.
Any Ideas and suggestions to what I should do next?!
Thanks in advance,
Andy R