high idle

Asked by Feb 27, 2016 at 05:32 PM about the 2003 Buick Century Base

Question type: General

I replaced the maf, pcv, tps. Still it doesnt idle. I unplug the maf, idle kicks up to maybe 2000 rpms.....any sugestions ?

5 Answers

11,540

scan for codes. possibly idle air control valve.

Ive changed the idle air control valve, still high idle....

11,540

Could be sucking air somewhere, check for vac leaks.

When I unplug the maf, the idle kicks up, I plug it back up and the motor dies. know I didn't mention that earlier. Does that help find a possible solution or pin point the vacuum that could be causing the problem ?

290

Common Century problem is the TPS. It rarely sets off a code is why it's so hard to diagnose. To change one on a late model Century, get a T20-3/8 socket with an extension to get it off. A T20 screwdriver is tight and you might not be able to get your hand in there to grip it. Don't get one of those cheap $5 EBay TPS specials, unless you don't might changing it 4 times a year!

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