High idle after new APPS (1 Viewer)

[Ullr]

I threw a P1120 with the accompanying VSC lights and the LC was in "limp" mode. So I just replaced the APPS as per FSM and I am now idling at 1100-1200 rpm (FSM states 700 +- 50). I have read the FAQ. I have removed and reinstalled the unit twice, resetting the ECU each time, no luck. I looked up Idle Speed in the FSM and it states "check air intake". There is no tension on the throttle cable.

Any ideas where to look next? Do I dare back off the two screws in the throttle body that the APPS arm comes to rest against when the throttle cable is not under tension?

 

[mcalvarez73]

you changed the APPS and not the TPS, correct? as far as i know if TPS is changed.. it has to be adjusted, if not, idling problem occurs.. after i changed my APPS almost 2 years ago i didn't have any idling problems at all...

 

[Ullr]

Yes, APPS and not TPS.

 

[Trunk Monkey]

Depending on how high, it may just be the ECU relearning. Give it a few starts/stops and some hiway miles.

 

[Ullr]

Depending on how high, it may just be the ECU relearning. Give it a few starts/stops and some hiway miles.

While I must admit that "just drive it and see what happens" did not seem like a useful response at first it made sense after i thought about it... and that's exactly what happened. I took it all apart and reassembled it and reset the ECU one more time just to make sure I had it correct then drove it to Boulder and back. It was fine by the time I got back.

I had cleaned out the throttle body while I was in there and I think the combination of new sensor and clean throttle made for a bit of a learning curve for the ECU.