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1990 Ford Mustang Idle problems

Tiny
LKELLER
  • MEMBER
  • 1990 FORD MUSTANG
Engine Mechanical problem
1990 Ford Mustang V8 Two Wheel Drive Manual

My car will start just fine and idle good for about 1 minute. It then starts to idle down and have trouble running and will die. If I constantly pump the brakes the car will idle just fine. I know it is a vacuum problem, but not sure where to look. Please help!
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Thursday, May 20th, 2010 AT 8:06 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Clean out the idle air control valve and test the coolant temperature, throttle position and mass airflow sensor and also look vacuum leaks
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Thursday, May 20th, 2010 AT 8:30 AM
Tiny
LKELLER
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Thanks for the feedback. The IAC and TPS are brand new. Engine coolant temp is right where it should be, so I guess that this just leaves the MAF and vacuum leaks. Does it make sense that the issue is on the brake booster?
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Thursday, May 20th, 2010 AT 8:42 AM
Tiny
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Could be the booster is leaking
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Thursday, May 20th, 2010 AT 2:21 PM

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