Question about 2002 Pontiac Sunfire
High idle sometimes it idles high then low sorta pulsing.
somtimes if I turn the heater to defrost it idle up to 4000 rpm but as soon as I take it off defrost it goes back down
replaced the computer 1 year ago
engine codes p1133 p0171 p0507 p0131 all at once
Per your description, it sounds like you have a vacuum leak.
Check all vacuum hoses at the engine, make sure no hoses are disconnected, cracked or damaged.
Disconnect each hose at the source on the engine and see if the engine idle stabilizes.
Let me know what you find and we can go from there.
Posted on Mar 10, 2009
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jun 17, 2015 | Cars & Trucks
May 14, 2014 | 2003 Kia Sedona
Apr 15, 2011 | Buick Regal Cars & Trucks
Jun 07, 2010 | 2005 Nissan Altima
May 16, 2010 | 2002 Buick LeSabre
Apr 20, 2010 | GMC Envoy Cars & Trucks
Oct 15, 2009 | 2003 Oldsmobile Alero
Sep 24, 2009 | 2004 Chevrolet Silverado 1500 Crew Cab
Mar 17, 2009 | 2002 Chevrolet Silverado 1500
Mar 10, 2009 | 2000 Ford Expedition
1,989 people viewed this question
Usually answered in minutes!