Mr. Trick

iTrader: (19)

I recently got my car tuned and it ran great for a couple days and was shifting at 6700 rpm like it is tuned to do so, now for some reason it shifts around 6300. The car is not throwing any codes and the tps reads 99% when pressed to wot. What could be causing this? The only thing I did after the tune was pull the abs fuses because the car has 26s in the front and 28s in the rear.

mrvedit

WOT uses a different shift table than partial throttle.
The % throttle for WOT can be tuned too. While I set it to 95%, perhaps your tuner set it to 100% and you are now only reaching 99%. The TPS generally has some adjustability; adjust it so that WOT gives you 100%, assuming the throttle really is opening all the way.

murphinator

iTrader: (2)

to command a shift you need to reach both set speed and rpm , your speed is possibly off because of tire height change, been a while since I have done any tuning but I would look at that also...

Mr. Trick

iTrader: (19)

The car was tuned with the 26s and 28s. I did notice one of the front speed sensor wires got loose and was hanging, could it be possible that it got damaged and is screwing everything up? Or does it matter since the abs fuses are pulled? I'm kinda just spit balling here cause its frustrating me cause it was running spot on and just changed overnight. I will also check the tps and see if I can get it to read 100%.

Mr. Trick

iTrader: (19)

I just noticed my redline moved down 400 rpm also. So I'm guessing this is more of a tps problem. I dont get it.

mrvedit

Only a change in tune can change the redline.
I just checked a stock 2002 tune and the WOT shift tables are used at 94% throttle and above. It might be time to check with your tuner.

performabuilt

iTrader: (25)

A drop in shift point can be caused by a dirty or over oiled filter contaminating the MAF sensor try cleaning it

Mr. Trick

iTrader: (19)

I cleaned the MAF sensor and made a quick run and my digital tach recorded a peak of 6350. My MAF is descreened also.

mrvedit

Just to be clear - the trans shifted by 6350 or the engine cut out at 6350? You would need to put the shifter in D1 or D2 to rev high until the engine cuts out to determine what redline is. As far as I know, redline is only set by the tune.

Mr. Trick

iTrader: (19)

It shifted at 6350, I will put it in D1 and see where the engine starts to cut out for sure.