I'm hoping someone has heard of this problem. Drove my '93 caravan, 3.3, 4sp auto, 200K miles through a puddle and it started misfiring. (I thought time for new wires). Next day she fired up fine and drove fine for a week. And then it rained. She died after going through a puddle. I believe the speedo jumped from 30 to 60MPH then bounced down to 0, then back to normal (it does not have a speed sensor, I think this is from the computer putting it in neutral while dieing). Then the check engine light blinks once, then its dead. Cranks but won't start. Went ahead and replace the wires and coil. Engine code shows code 42, Auto Shut Down. Diagnostics computer shows crank senor good, cam sensor good, Auto shut down "ON". Computer won't reset. Disconnect battery, won't reset. Disconnect computer, won't reset. Disconnect/connect crank sensor, car fires one cylinder then "ASD". Replace both crank and cam sensors with known good sensors, fires once, then ASD. Replace the computer with a known good one. Car starts and runs. Yea! Runs fine for 19 miles and I hit a puddle. ASD!!!!!!! Disconnect and reconnect good computer, nothing. disconnect/connect sensors, fires once then nothing. Take good computer out, put bad computer in, it starts. (@#$%) Idles fine, revs up fine. put it in gear, idles fine, hit the gas it starts bucking then ASD (more @#$%).
Three questions.
- Has anyone heard of this? Any guesses?
- Could it be the tranny wiring harness is getting wet? If so, does anyone know the wire colors of the crank sensor?
- Right after it died the last time, I heard a very faint whinny alarm sound coming out from between the battery and the tranny. It was not coming from the computer, the tranny computer, nor the shift control module on the tranny. It stopped when I turn the van off and back on. Does anyone know what this alarm is?
Thanks to all who answer.