Question about 1998 GMC Jimmy
There may be another nut along the line into the cab/ at the shifter that is diconnected or frozen, i had an old oldsmobile that i got stuck at the gas station cause the bolt came out. simple fix, but sucked doing it at the gas station lol
Posted on Feb 23, 2012
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Posted on Jan 02, 2017
SOURCE: TPS in a 1998 GMC Jimmy
the tps is ususally at the side of the throttle body opposite where the throttle cable / tv cable mount.
sometimes it won't start, run, or run erratically. there are ways of testing this unit (by output voltage) before you commit to buying a new one. to test it you will need a dvom (digital volt ohm meter).
just a note: straight from the book... "a broken or loose tps can cause intermitten burst of fuel from the injector and an unstable idle because the ecm thinks the throttle is moving."
Posted on Sep 22, 2008
Your transmission is electronic, it read's the the speed sensor from the yoke and relay's the information to the ECM which tell's the servos in the transmission acivate to change the gears up or down with the engine out put.
Posted on Apr 05, 2009
I would try changing the fluid and filter again. Sounds to me like there is a lot of crud built up in it and another change would probably do the trick. It probably wouldn't hurt to add a bottle of Lucas Trans Fluid at the same time. It will help extend the life of your transmission. Black fluid would likely be clutch material that wears off over time.
If this doesn't work you are likely in the market for another trans. Hope this helps.
Posted on Nov 28, 2009
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