1994 Pontiac Grand Am SE 4Cyl When very hard on the
#11
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I couldn't say for sure.
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
#14
Senior Member
True Car Nut
to me it sounds more like a problem with however it controls wot shifts, if its an electronic trans then i would suspect the map sensor. just because the trans is shifting when told to it seems. there could be something wrong with the pcm too or tps. it would help if you could hook up the scanner and see if things are in spec at wot
#16
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The transmission in that 94 should be a 4T60-E. Which means, its electronic, which means, the shifting is done via the PCM, but can also be "manually" shifted via the cable. Unless your talking about the old style carb'd kick down cable.
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
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2002 *-10 5.7 V8
2023 Jeep Rubicon Diesel
#17
Senior Member
Certified GM nut
I agree. This sounds like a throttle position sensor gone bad. I accidentally created this issue once by installing a new TPS backwards -- and sure enough, it revved almost to the redline, and then shifted when I let up on the throttle.
Since you don't have OBD-II, you can't just plug in a scan tool to read the TPS voltage. If you have a multimeter, try Dan'* TPS test.
Since you don't have OBD-II, you can't just plug in a scan tool to read the TPS voltage. If you have a multimeter, try Dan'* TPS test.
#19
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Any chance you can shoot a picture of this kickdown cable?
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2023 Jeep Rubicon Diesel
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2002 *-10 5.7 V8
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#20
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Not today. I may be able to from work tomorrow. To be honest didn't actually look on car just going off what my parts department told me based off my vin