vs v6 constant high idle issue

[rossdogg]

i have a vs calais v6 that was converted to t5 manual, its always revved high on start up but dies down to normal idle, now i hadnt drove it for like a week and now it rev's up to 2000 rpm and just wants to get higher, even after driving to work, any ideas?

 

[lowandslow]

Give the IAC valve a clean and report back. It's on your TB.

While it's idling, spray some carby cleaner around all the joints/flanges after your tb. If it picks up RPM when sprayed you have a vac leak.

 

[Not_An_Abba_Fan]

Did you change the ECU to a manual? Or have you had it tuned for a manual?

 

[Bowen]

Re set tps, then reset ecu

 

[rossdogg]

i got a 69mm throttle body, brand new tps and iac about 10000k's ago but ill give it a try what would be best to use when cleaning the iac?

Give the IAC valve a clean and report back. It's on your TB.

While it's idling, spray some carby cleaner around all the joints/flanges after your tb. If it picks up RPM when sprayed you have a vac leak.

changed the ecu

Did you change the ECU to a manual? Or have you had it tuned for a manual?

how do you reset the tps?

Re set tps, then reset ecu

 

[Wozza]

Hi
Check the throttle cables have some slack in them and it isnt binding somewhere....then disconnect the neg battery terminal for a min or 2. Reconnect and start the car if the idle settles after a while and is back to normal
start looking for a bad earth somewhere..this happened to the neighbours car and we are pretty sure it was a bad earth(which we found) that cause the PCM to glitch on start up

 

[Not_An_Abba_Fan]

To reset the TPS, disconnect the battery for ten seconds, reconnect and start the car and rev to 2000rpm for ten seconds.

 

[rossdogg]

ive just bought a new acc cable as my one sticks some times and ive disconnected the battery terminals and it done nothing, i may try finding a bad earth tho

Hi
Check the throttle cables have some slack in them and it isnt binding somewhere....then disconnect the neg battery terminal for a min or 2. Reconnect and start the car if the idle settles after a while and is back to normal
start looking for a bad earth somewhere..this happened to the neighbours car and we are pretty sure it was a bad earth(which we found) that cause the PCM to glitch on start up

and ive tried that and the ecu reset no good

To reset the TPS, disconnect the battery for ten seconds, reconnect and start the car and rev to 2000rpm for ten seconds.

 

[Wozza]

Bummer a reset should settle everything for a while anyways...Your prob looking for extra air getting into the induction system, make sure the butterfly is fully closed with a little slack in the cable...there is a grub screw on a plate on the VS (passenger side looking towards TB) check that hasn't screwed itself in shouldnt happen but worth a check....check all hoses ect on the motor side of the the TB butterfly for possible air leaks and check the IAC is at least working

 

[rossdogg]

yeah there is next to no slack in the cable, and i fully screwed out the idle screw, and ill check the hoses etc after ive cleaned the TB, how would i check the IAC is working?

Bummer a reset should settle everything for a while anyways...Your prob looking for extra air getting into the induction system, make sure the butterfly is fully closed with a little slack in the cable...there is a grub screw on a plate on the VS (passenger side looking towards TB) check that hasn't screwed itself in shouldnt happen but worth a check....check all hoses ect on the motor side of the the TB butterfly for possible air leaks and check the IAC is at least working