NOT down shifting at WOT
NOT down shifting at WOT At WOT the tranny should down shift right? well what if its not? its a new tranny and it does shift. what could make this happen? line presure, converter lock up, PCM, or shift points? would tuning help?
mike
mike
PCM controls all upshifts and downshifts so I would say a tuning or sensor issue. Of couse it wont downshift at any speed at WOT either.
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Do you have a stall and of so has the car been tuned for the stall,
And what trans is actually in the car? what year is the PCM being used, What year is the trans?
And what trans is actually in the car? what year is the PCM being used, What year is the trans?
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Well its sounds like the car is in limp mode, If so there should be some codes in the PCM to tell you why.
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Ok the answers are there some of them in the codes
the_" P0123 - Throttle Position (TP) Sensor Circuit High Voltage" would affect everything from line presure to shift points.
The other code is not trans related.
You need to repair the TPS circuit and then get a scanner on there and watch whats being comanded by the PCM in data gear wise.
the_" P0123 - Throttle Position (TP) Sensor Circuit High Voltage" would affect everything from line presure to shift points.
The other code is not trans related.
You need to repair the TPS circuit and then get a scanner on there and watch whats being comanded by the PCM in data gear wise.
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well i sent the wire harness back to spear tech and he could not find anything wrong with the wireing. so now im waiting for it to come back in the mail. should be here weds. i just got a new MAF. i know what the TPS is but where is the TPS circuit located?
means all the wirng between the pcm and the tps
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o so it should be all set then. speartech said that all the wires were right on and all work right. he tested the PCM and harness on his motor at the shop. so now im waiting for it to come in and i can install it.
so if the tranny is good and the wire harness is good then what could it be?? the answer is there some where!!!!!!
so if the tranny is good and the wire harness is good then what could it be?? the answer is there some where!!!!!!
well I would start by clearing codes and drive and then recheck codes
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Turn the key on, mat the pedal with a voltmeter
on the TPS output (to ground) and read it. If
you are over 4.75V it will set the code and some
trans functions will act funny.
on the TPS output (to ground) and read it. If
you are over 4.75V it will set the code and some
trans functions will act funny.