MAP sensor bad?

1996 TOYOTA COROLLA
164,000 MILES
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DANSFRAZ
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My car idles really high, 1600-1800 rpm. I sprayed carb cleaner around all my vacuum lines an gaskets to try to find a leak and cane up empty handed. If I unplug the MAP sensor while the engine is running, the idle drops to 1000-1100. The IAC valve was tested and turned out to be good... Is the MAP sensor bad or what else am I supposed to check.
Apr 22, 2012 at 9:36 PM
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ASEMASTER6371
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no, map good. you either have a vacuum leak, stuck throttle body or bad idle air control motor. how did you test it??

Roy
Apr 22, 2012 at 10:00 PM
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DANSFRAZ
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I didn't physically test it myself, I went to a shop and they ran a test and said it was. Now Im starting to think I may have been lied to just because they couldn't figure it out. Is there a visual way to see if the TB is stuck? And short of a smoke test, whats the best way to find a vacuum leak?
Apr 22, 2012 at 10:47 PM
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ASEMASTER6371
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no visual way as 1/32 of an inch will cause this.

listen for a vacuum leak. otherwise get a new shop to help you.

Roy
Apr 22, 2012 at 11:11 PM
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DANSFRAZ
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How do I test my Idle air control valve?
Apr 22, 2012 at 11:29 PM
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ASEMASTER6371
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
you cannot unless you have a scan tool. it is a process that activates it and retracts it to test.

Roy
Apr 23, 2012 at 12:01 AM
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