| | > After I drive about 6 miles, my 95 Z28 V8 feels like it is running on
| | > cylinders. After I drive a little longer, it clears up most of the
| | and
| | > seems to run fine on the freeway. Had service done last weekend and
| | > couldn't find the problem. All sensors check out fine according to
| | PCM.
| | > Anybody else run across this problem? Must be a bad injector is what
| | > think. Anybody got an easy way to test injectors? They want $1300 to
| | > change all the injectors. I am an electronic systems engineer so I
| | > handle getting some basic test gear.
| | Have you cleaned up the coil wire ends and connectors? Has the water
| | been leaking through the weep hole in the bottom? Your symptoms point
| | directly at the optispark going out or the coil wire being corroded.
| I didn't see any leakage from the water pump weep hole best I could tell.
| Why would it run fine when cold if the coil wire was corroded? My fuel
| pressure does not hold right after shutting engine off (has been this way
| for over a year) so that is why I am suspecting an injector.
For anyone interested, this problem ended up being either a bad sparkplug
wire or the fact that we found two sparkplugs slightly loose when we checked
them and changed the plug wires. All plugs looked like they were burning