Archived Truck dies going into gear!

[TurboTweaker]

Ok... ... so the truck dies going into reverse and loads up to %100 load going into drive. when it loads up in drive you have no pedal. it has thrown a 121 code so i checked the wiring and it was fine. i replaced the APPS and had my HRVP gone over and it was fine as well. i need your help guys i have a dyno day on saturday and its kinda hard to back it into the dyno room if it wont go into reverse. i just moved it into the shop and i was ridding the break and trying to give it the go pedal and nothing happened. HELP!!!!



Thanks

The Fat Kid

Andy

 

[Graphic man]

P0121

Accelerator Pedal Position Sensor Signal Volts Do Not Agree w/Idle Validation





did you do an apps reset?..... check voltage and match it to whats on the sticker on the apps?





Scott

 

[TurboTweaker]

no sticker on the APPS with voltage, just say dont monkey with it. some people talked about it being a bad CPS or KPS so maybe someone could enlighten me on those.



The Fat Kid

Andy

 

[JoshPeters]

If it was the cam or crank position, I don't think it would start.



Umm... the dang thing is STILL doing it with it's... what 3rd APPS now?



The wiring Ohmed ok. There has to be another circut that we don't know about. Something isn't right.



Have you checked the grounds to the ECM?



(Sorry, I should have thought of it more the other night. I thought we found it when that APPS showed bad. )

JP

 

[TurboTweaker]

TTT



Any more Ideas guys? i need it run for the dyno day coming up on sat.



Thanks The Fat Kid

Andy

 

[zstroken]

Get a scan tool and you can check out a ton. Surely somebody will have one at the dyno day.