high idle
50

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

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 ?

9 Answers
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Brian answered 8 years ago

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

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Brian answered 8 years ago

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 ?

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1,525

TheGMGuy answered 7 years ago

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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GuruDWFNK answered 6 years ago

If you unplug the maf and it runs betier and you plug it back in and it stalls then it's your maf!!! 100%

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Jeff answered 5 years ago

I'm having the same issue. My 2001 will idle real high for a day and then go down. What's a TPS?

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GuruF3GLQ answered 3 years ago

High idle after warm engine jerks .i found a Gm service bulletin from 02 it said high idle .and no check engin light and fish bite .which means a jerk.the fix is a tips sensor.tried it .fixed it...amen tired of working on it

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