Join Date: Sep 2008
Location: Fruitland Park,Florida
Have you actually used an obd1 scanner to scan for codes? I ask because there are codes that, when set, don't turn on the check engine light and affect how engine runs.
Seeing your car is 19 years old, I would check out opti wire harness, check all engine and pcm grounds, pcm power wires, then start checking the pcm connectors. Checking the pcm connectors involves the use of a multi meter to check to see if the proper voltages are present at the correct time. Checking wiring to sensors wouldn't be a bad idea either.
Checks of wiring includes looking for broken insulation, ohming wires to check for opens in the wire. Checking connectors for burnt,bent, and poorly fitting pins, etc.
Go to 4th gen section and download the factory 94 service manual. Volume 2 will have driveability section, and complete wiring diagrams. Driveability section also has the pcm connector chart that tells what voltages to expect when testing, as well, as, the pcm symptom chart that tells what symptoms you get when each pcm wire has a fault. Much component testing in section also.
Last edited by cocobolo95; 01-28-2013 at 08:04 PM.