91XJ, Transmission problems...

dwebb944t · Mar 9, 2004

Hi, I am new to the list... please bear with me

I have a stock 91 Cherokee with the AW4 transmission, it is shifting wierd, sometimes it will stick in 3rd gear sometimes in 2nd gear. Sometimes it shifts perfectly. I have replaced the TPS and it did not help. Could it be the TCU or NSS? Any ideas?
TIA,
Dan

richdoo · Mar 9, 2004

Here this may help

DaveD in Canada · Mar 9, 2004

Sounds like the infamous bad TPS ground! Try splicing a new ground wire into the TPS harness at the connector, and ground it to the engine or throttle body. This fix has worked for scores of XJ'ers. Make sure you get the right wire, any other wire besides ground will really mess things up.

dwebb944t · Mar 9, 2004

DaveD in Canada said:
Sounds like the infamous bad TPS ground! Try splicing a new ground wire into the TPS harness at the connector, and ground it to the engine or throttle body. This fix has worked for scores of XJ'ers. Make sure you get the right wire, any other wire besides ground will really mess things up.

Cool, I will try it, does anyone have a description of the pin outs for the TPS, or a cheap manuel to recommend?
Thanks,
Dan

SOOLONG · Mar 9, 2004

There are three wires in to the TPS. The blk/lt blue is the ground supply wire coming from the ECU the orange/black is the TPS in to the ECU and the violet wire is the 8 volt supply from the ECU. Hope this will help.

Joe

SOOLONG · Mar 9, 2004

OOPS! The viloet wire is 5 volt supply not 8 volt.

Joe

dwebb944t · Mar 9, 2004

So, I should take a wire from ground and splice into the blk/lt blue wire? And I should have the harness plugged into the TPS when testing right?
Thanks,
Dan

91XJ, Transmission problems...

dwebb944t

NAXJA Forum User

richdoo

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DaveD in Canada

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dwebb944t

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SOOLONG

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SOOLONG

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dwebb944t

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