1991 Mazda Protege idle

1991 MAZDA PROTEGE
180,000 MILES • 4 CYL • FWD • MANUAL
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FRANK MART
  • MEMBER
  • 1 POST
my idle is high ,when i start the car after a few min. it will start to very hi&low, when i speed up the engine and slow down the idle stays hi again and it starts all over.
Sep 20, 2008 at 8:26 AM
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MERLIN2021
  • ✓ASE Certified Mechanic
  • 17,250 POSTS
  • ASE Certified Mechanic
You may have a vacuum leak, get a can of spray gumout, spray the vac lines and maniflod area, when the idle changes, youve found the leak! You want the engine running and spray on the outside but do direct the stream onto the hoses, if it is a vacuum leak, the engine idle will change speed, then you have detected a leak, repair the vacuum leak and see how it runs! If that doesnt do it, you may need a new idle air control valve, it's bolted to the throttlebody


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Sep 20, 2008 at 8:37 AM
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