DBW pedal is 100% WOT at 1/2 pedal travel
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From: Elizabethtown, PA
DBW pedal is 100% WOT at 1/2 pedal travel At about 1/2 of the pedal's mechanical motion, the butterfly on the TB is wide open.
Putting the pedal to the floor does nothing else, but if you're driving and floor it and hold it too long, the PCM goes into limp mode.
Which part needs fixed?
PCM is an '03 GMC 2500 pickup
Motor is an '04 Chevy silverado 2500 pickup
The pedal and TAC were ordered for a 2004 silverado 2500, but I have no idea what I actually got.
I hooked up an '04 silverado PCM, and the pedal is behaving the same way.
Putting the pedal to the floor does nothing else, but if you're driving and floor it and hold it too long, the PCM goes into limp mode.
Which part needs fixed?
PCM is an '03 GMC 2500 pickup
Motor is an '04 Chevy silverado 2500 pickup
The pedal and TAC were ordered for a 2004 silverado 2500, but I have no idea what I actually got.
I hooked up an '04 silverado PCM, and the pedal is behaving the same way.
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From: Elizabethtown, PA
I took the pedal over to my 04 Yukon, and the pedal is operating it's TB 100% at about half travel too, so I ordered a new position sensor for an '04 Yukon, and I'll try it that way on Monday.
Not sure about ETC tb's but cable equipped vehicles normal tps read is about .5V closed and around 4.5~ WOT. Over that usually causes shifting issues or failsafe mode. Original owner of my ls car got carried away with the bumpstop mod and it caused problems.
2003 to 2006
APP Sensor 1 = 0-2.5 Volts
APP Sensor 2 = 0-5 Volts
TP Sensor 1 = 0-5.0 Volts
TP Sensor 2 = 5.0-0 Volts
Normal Operating Range
APP Sensor 1 = 0.24-2.24 V
APP Sensor 2 = 0.24-4.49 V
The TP sensor 1 signal voltage is 0.37 volt ot 4.51 volts.
2003 to 2006 T-Body
APP Sensor 1 = 0-2.5 Volts
APP Sensor 2 = 0-5 Volts
TP Sensor 1 = 0-5.0 Volts
TP Sensor 2 = 5.0-0 Volts
Normal Operating Range
APP Sensor 1 = 0.24-2.24 V
APP Sensor 2 = 0.24-4.49 V
The TP sensor 1 signal voltage is 0.37 volt ot 4.51 volts.
2003 to 2006 T-Body
Last edited by CalEditor; Nov 14, 2010 at 11:28 AM.
Trending Topics
2001 & 2002 GMT800
APP Sensor 1 = 0-5.0 volts
APP Sensor 2 = 5.0-0 volts
APP Sensor 3 = 5.0-0 volts
TP Sensor 1 = 0-5.0 Volts
TP Sensor 2 = 5.0-0 Volts
I think the APP sensor was used from 2001 to 2005 possibly
2001 & 2002 T-Body
APP Sensor 1 = 0-5.0 volts
APP Sensor 2 = 5.0-0 volts
APP Sensor 3 = 5.0-0 volts
TP Sensor 1 = 0-5.0 Volts
TP Sensor 2 = 5.0-0 Volts
I think the APP sensor was used from 2001 to 2005 possibly
2001 & 2002 T-Body
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From: Elizabethtown, PA
Ok, I've got the 03-06 version. Maybe I somehow ended up with an '02 pedal... who knows-- I will try a new '04 pedal sensor on Monday and hopefully this will straighten things out.
Thanks!
Thanks!
the throttle pedal assy is different from03, 04-05, i have see this issue before,, the different pedal along with the tune differance will cause this issue,, depending on which way you go you will either only have 1/2 throttle at wot pedal, or full throttle at 1/2 pedal
need the correct year pedal to match the tune in the ecm
need the correct year pedal to match the tune in the ecm
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From: Elizabethtown, PA
My pedal plug is colored like this, coming out of the TAC module:
A - Gray
B - Purple
C - Lt Blue
D - Tan
E - Yellow/Black
F - Blue
G - White/Black
J - Brown
K - Green
A - Gray
B - Purple
C - Lt Blue
D - Tan
E - Yellow/Black
F - Blue
G - White/Black
J - Brown
K - Green
Last edited by Jim_PA; Nov 15, 2010 at 06:08 PM.
Thread Starter
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From: Elizabethtown, PA
the throttle pedal assy is different from03, 04-05, i have see this issue before,, the different pedal along with the tune differance will cause this issue,, depending on which way you go you will either only have 1/2 throttle at wot pedal, or full throttle at 1/2 pedal
need the correct year pedal to match the tune in the ecm
need the correct year pedal to match the tune in the ecm
Thanks
the throttle pedal assy is different from 03, 04-05, i have see this issue before,, the different pedal along with the tune differance will cause this issue,, depending on which way you go you will either only have 1/2 throttle at wot pedal, or full throttle at 1/2 pedal
need the correct year pedal to match the tune in the ecm
need the correct year pedal to match the tune in the ecm
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From: Elizabethtown, PA
Yep, that looks to be the one -- I am sending back the '04 APP Sensor because it's doing the same thing.
The PN for an '03 APP sensor is different Dorman 699-102 (for '03) VS 699-101 (for '04)
I didn't touch the connector from the engine harness to the TAC Module, but I will go over them while I'm waiting for the '03 APP sensor to arrive.
Thanks for the diagrams --
The PN for an '03 APP sensor is different Dorman 699-102 (for '03) VS 699-101 (for '04)
I didn't touch the connector from the engine harness to the TAC Module, but I will go over them while I'm waiting for the '03 APP sensor to arrive.
Thanks for the diagrams --
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From: Elizabethtown, PA
Although the 03 and 04 APP sensors are different PN's, they both seem to operate about the same way. At rest, TPS is registering about 20% by half throttle, it's up to 100%.
What's next???? New pedal assmbly from an '03 GMC?? I think the pedal I have now is from an '04 2500 Silverado.
New assembly was already suggested, but I haven't seen any indication as to why a different one would solve the problem, or how I can tell for sure which one I need to get.
What's next???? New pedal assmbly from an '03 GMC?? I think the pedal I have now is from an '04 2500 Silverado.
New assembly was already suggested, but I haven't seen any indication as to why a different one would solve the problem, or how I can tell for sure which one I need to get.
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From: Elizabethtown, PA
Sounds like the new beta version of HPTuners will let me adjust TPS to pedal position!!??
https://ls1tech.com/forums/conversio...-tps-idle.html
Might just fix everything?
https://ls1tech.com/forums/conversio...-tps-idle.html
Might just fix everything?
Sounds like the new beta version of HPTuners will let me adjust TPS to pedal position!!??
https://ls1tech.com/forums/conversio...-tps-idle.html
Might just fix everything?
https://ls1tech.com/forums/conversio...-tps-idle.html
Might just fix everything?