[275]

I have an intermittant problems with my 92 Trooper. Occassionally, the speedometer will stop working. It might resume working or it might not. Usually the next time i start up, it's working again. if the speedo quits and doesn't come back, after a while the "check engine' light comes on, and the engine will stall out at traffic lights unless i ride the gas pedal.
had it diagnosed and the Vehicle speed sensor tested bad. so both the front and rear speed sensors were replaced. (at different times by different techs)
the front one was off a wreck (allhyundiaisuzuparts), the rear one was new (ouch!).
no noticable changes in the symptoms.
the next issue is after driving at about 70 for a hour, the car began lurching and slipping. letting it cool of it seemed OK again. tranny shop found nothing wrong, but I noticed the fluid was high on the stick when i checked it. if the shop overfilled my tranny, will this maybe cause the fluid to foam up and then slip? There does not seem to be a way to drain the tranny without dropping the pan. is this true?

finally my O2 light came on and won't go out. this seems to be unrelated to the other issues and doesn't seem to matter, my gas mileage is consistant.
For the speedo issue, whihis the one that is urgwent: maybe i got a loose wire on the ecu? how do i get at it to inspect it?
i got a auto 4WD 4 door. we like it and need to keep it going.
HELP!!

 

[KTJeffries]

I would look at your distributor. The next time you get a check engine light check to see what code is being thrown (by connecting the two connectors located next to ecu and waiting for the light to flash the codes). That will at least give you some idea.

As for your O2 light, that's just a timer...you can turn it off by either removing the O2 bulb from the instrument panel, or turn it off by moving a screw on the back of the instrument panel This isnt anything to worry about.

 

[275]

i need to get clarifications please.

what about the distributor?

when the speedo dies, there is nothing for me to read out;
but if the 'check engine' 'light goes on, then what exactly do i do?

i'm an electronics technician, but not familiar with automotive.
how do i get at the ecu? what lights will flash?
do i measure with the engine running
if i shut off the motor, the condition will clear when i restart the motor.i know there is memeroy in the ECU, so perhaps it will retain the last trouble signal it saw?

the shop wants $50 each time they hook up the car to their diagnostic.
So if i can handle this myself, i willing to try.
i have the official 92 trooper workshop manual. so if you direct me a little i can self teach myself.