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How to test iac on 1990 lesabre - 1990 Buick LeSabre

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I have a 1990 buick park ave that is idled very high


check your car's error codes for anything you might have missed. the last time I had that problem, the knock sensor had also gone out due to a spark plug wire leak that had also done a number on the computer.

Dec 08, 2014 | 1990 Buick LeSabre

1 Answer

Having idling problem on 1990 buick lesabre limited when in park or neutral the rpms go up from 1500 to 2500 sometimes 3000 in the past i replaced the tps, idle control valve, cleaned the mass air flow...


Check for a vacuum leak. You may need to adjust the IAC(idle air control). If the power brakes are also very hard then its a vacuum leak.

Jan 01, 2014 | Cars & Trucks

1 Answer

What does an IAC look like on my camry 1990


See here

http://www.toyotanation.com/forum/107-camry-solara-lounge/86540-how-guide-clean-iac-valve-56k-patient-big-pict.html



and at p168, 208, 214


http://www.turboninjas.com/camry/eg1.pdf

Jan 18, 2013 | 1990 Toyota Camry

1 Answer

1990 buick regal idles great, die when press accelerator, has new fuel pump


check the fuel filter. Also pull the IAC valve and make sure its not clogged up with carbon.

Dec 03, 2012 | 1989 Buick LeSabre

1 Answer

Car sometimes shut off at stop,turns,and takeoffs


Sounds like your IAC (idle air control) is moving slow, dirty with carbon, you can try cleaning it,
I have had short success with cleaning them and always end up replaceing the IAC. IAC is located at the throttle body.

Jul 27, 2011 | 1990 Buick LeSabre

1 Answer

Need spark plug diagram for 1990 buick lesabre


Visit http://www.densoproducts.com

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Sep 02, 2009 | 1990 Buick LeSabre

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99 buick lesabre the check engine light doesnt come on at all how can i fix that


BEFORE YOU CAN ATTEMP ANY REPAIRS U MUST HAVE THE SYSTEM TESTED FOR THE FAULT CODE THAT IS STORED EACH TIME THE LIGHT IS SET, THERE ARE OVER 50 SUCH FAULTS POSS IN YOUR CAR, SO HAVE THE TEST DONE.

Jul 22, 2009 | 1990 Buick LeSabre

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