Hello all,
im having an issue with my TPS% reading 30% at idle.
It also reads 204% at pedal to the medal.
heres my info:
-AMC 304 V8
-using 5.7L throttle body with 65lb/hr injectors
-1227747
-$42
-IAC is 18 steps
-TPS voltage is .57V
-idle 800 RPM
-open loop idle AFR 13.9
-elevation 5000'
-using 42.xdf from tunerpro's website.
I pulled the power to the system overnight, but nothing changed. Is there something I'm missing?
Last edited by AlpineCJ5; 02-23-2015 at 07:32 AM.
IIRC, to read TPS% correctly with a 7747, there is a datastream value that needs changed.
TPS voltage seems fine, so nothing odd there. the TPS% value shouldn't be capable of displaying above 100% though.
1995 Chevrolet Monte Carlo LS 3100 + 4T60E
TPS percentage is not a native part of the '7747 datastream, and ADX values are usually a fudged range that doesn't always work out to be accurate.
The only TPS value that is in the '7747 datastream is TPS voltage.
IIRC Mark had mentioned that there was a change that could be done in the bin to send out a proper TPS percentage value but it still wasn't 100%correct, just closer than trying to manipulate the TPS voltage value.
The man who says something is impossible, is usually interrupted by the man doing it.
great info! I figured it was simply a calc based on TPS volts, but it didn't make sense how it could be so wrong.Originally Posted by Six_Shooter
so knowing this, how should I tune stuff dependent on TPS%? for example, I'm tuning my PE circuit now, Is it okay to tune PE by offsetting MIN TPS% for PE by 30%? So I'd set PE to 100% instead of 70% for a true 70%.
Ignore TPS % in the ADX, it's not valid.
I can't give you any solid answer on how to tune parameters that use TPS %, other than feel and trial and error. You can guestimate what the TPS percentage would be, based on volts, and the pedal under your foot.
The man who says something is impossible, is usually interrupted by the man doing it.
Alright. This is what I'll do. Thanks guys!
Posting Permissions
Reply With Quote
Bookmarks