MAP SENSOR BAD?

  • Tiny
  • dansfraz
  • 1996 Toyota Corolla
  • 164,000 miles

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.

Do you
have the same problem?
Yes
No
Sunday, April 22nd, 2012 AT 9:36 PM

5 Replies

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

No, map good. You either have a vacuum leak, stuck throttle body or bad idle air control motor. How did you test it?

Roy

Was this
answer
helpful?
Yes
No
Sunday, April 22nd, 2012 AT 10:00 PM
  • Tiny
  • dansfraz
  • Member

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?

Was this
answer
helpful?
Yes
No
Sunday, April 22nd, 2012 AT 10:47 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

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

Was this
answer
helpful?
Yes
No
Sunday, April 22nd, 2012 AT 11:11 PM
  • Tiny
  • dansfraz
  • Member

How do I test my Idle air control valve?

Was this
answer
helpful?
Yes
No
Sunday, April 22nd, 2012 AT 11:29 PM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,556 posts

You cannot unless you have a scan tool. It is a process that activates it and retracts it to test.

Roy

Was this
answer
helpful?
Yes
No
Monday, April 23rd, 2012 AT 12:01 AM

Please login or register to post a reply.

Similar Questions