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#218967 - 12/28/12 08:39 AM High RPMS!! when idling! any idea??
GTPJose Offline
Junior Member 		Registered: 07/12/12
Posts: 3
Hi guys! My GTP '99 with 88K miles a few days ago is idling very rough at 1500 RPMS (cold) and 2500 RPMS (normal temperature). I've already disconnect the TPS, IAC and EGR(one at a time) with no changes on RPM's. No OBD codes and no leaks so far! Any idea of the cuplrit? frown

Thanks in advance for your comments and Happy New Year 2013!


Edited by GTPJose (12/28/12 08:42 AM)
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#218968 - 12/29/12 05:25 PM Re: High RPMS!! when idling! any idea?? [Re: GTPJose]
r.s.hutchinson Offline
Member 		Registered: 01/01/08
Posts: 3900
Loc: Ontario, Canada
Check for vacuum leaks. That is the most likely culprit.
_________________________
00 Turbo GTP - 97 GTP - 03 GSXR600
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#218969 - 12/30/12 12:39 PM Re: High RPMS!! when idling! any idea?? [Re: GTPJose]
GTPJose Offline
Junior Member 		Registered: 07/12/12
Posts: 3
no vacuum leaks! frown any other suggestions!
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#218970 - 12/30/12 12:40 PM Re: High RPMS!! when idling! any idea?? [Re: GTPJose]
GTPJose Offline
Junior Member 		Registered: 07/12/12
Posts: 3
no vacuum leaks! frown any other suggestions!
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#218974 - 12/31/12 02:18 PM Re: High RPMS!! when idling! any idea?? [Re: GTPJose]
r.s.hutchinson Offline
Member 		Registered: 01/01/08
Posts: 3900
Loc: Ontario, Canada
MAF sensor?

You sure there are no vac leaks? Did you check around injector o-rings?
_________________________
00 Turbo GTP - 97 GTP - 03 GSXR600
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#218975 - 01/01/13 10:15 AM Re: High RPMS!! when idling! any idea?? [Re: GTPJose]
20gtp02 Offline
Member 		Registered: 04/13/06
Posts: 6709
Had this issue for months.
Sometimes throwing code sometimes not.
Car could go for weeks with no issues.
Then high idle, I could do 40 mph without touching the pedal.
I was getting TPS codes.
Replaced TPS and that fixed mine.
But like others said, could be a list of possibilities.
_________________________

2002
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