weird revving

samel · 04-28-2008, 08:12 PM

i have a 2002 gmc sierra 1500. when i put it in park the motor revved up to about 1200 rpm. it doesnt normally idle there. it just started today i was just wondering what it could be. there is nothing wrong with the throttle cable i checked that.

75K30 · 04-28-2008, 09:40 PM

Welcome to the site;

High revving engines at idle is a reasonable indication that there is an intake, or vacuum leak.
Check for leaks.

03chevy · 04-29-2008, 06:25 AM

a can of carb cleaner will work wonders on finding a vacuum leak!

Black 95 TSI · 04-29-2008, 12:06 PM

My 2000 1500 did the same thing. it was a TPS goin bad. i unhooked the TPS and the idle droped down to like 700 rpms. Try having the computer scaned for codes first, I had a TPS code stored in history, that led me to the TPS.

scottie · 05-01-2008, 05:16 PM

if the check engin light is on, scan it before runnin in circles

if not, check your pcv. if thats good, ceck for vacuum leak

04-28-2008, 08:12 PM	#1
samel Junior Member Join Date: Apr 2008 Posts: 1	weird revving i have a 2002 gmc sierra 1500. when i put it in park the motor revved up to about 1200 rpm. it doesnt normally idle there. it just started today i was just wondering what it could be. there is nothing wrong with the throttle cable i checked that.

04-29-2008, 06:25 AM	#3
03chevy Senior Member Join Date: Dec 2006 Location: jax,fl Posts: 988	a can of carb cleaner will work wonders on finding a vacuum leak! __________________ A dirty mind is a terrible thing to waste!

05-01-2008, 05:16 PM	#5
scottie Senior Member Join Date: Jan 2006 Location: South Florida (Palm Beach), originally from south of BOSTON Posts: 644	if the check engin light is on, scan it before runnin in circles if not, check your pcv. if thats good, ceck for vacuum leak __________________ im a straight shooter with upper management written all over me

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04-28-2008, 09:40 PM	#2
75K30 Senior Member Join Date: Jul 2006 Posts: 2,507	Welcome to the site; High revving engines at idle is a reasonable indication that there is an intake, or vacuum leak. Check for leaks.

04-29-2008, 12:06 PM	#4
Black 95 TSI Junior Member Join Date: Jan 2007 Posts: 2	My 2000 1500 did the same thing. it was a TPS goin bad. i unhooked the TPS and the idle droped down to like 700 rpms. Try having the computer scaned for codes first, I had a TPS code stored in history, that led me to the TPS.