4l60 shifting 400 rpm too soon as well as rev limiter dropped 400 rpm
#1
12 Second Club
Thread Starter
iTrader: (19)
Join Date: Jan 2005
Posts: 1,086
Likes: 0
Received 0 Likes
on
0 Posts
4l60 shifting 400 rpm too soon as well as rev limiter dropped 400 rpm
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.
#2
Moderator
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.
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.
#4
12 Second Club
Thread Starter
iTrader: (19)
Join Date: Jan 2005
Posts: 1,086
Likes: 0
Received 0 Likes
on
0 Posts
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%.
#6
Moderator
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.