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2000 Ford Focus idle issues

Tiny
BDOVER5314
  • MEMBER
  • 2000 FORD FOCUS
  • 2.0L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 215,000 MILES
My car started to idle rough. After 2 days it was so bad it shakes and completely bogs down to stall on me. But if I hit the gas, it stops and runs normally until it is idle again. There is a hissing noise coming from something somewhere around intake. Engine light came on, had codes read. They recommended the mass air flow sensor or the idle air control. I replaced both and neither helped. They said the other option was throttle position sensor. When I put the new one on, I cranked the car and it revved way up. RPM wouldnt go back to idle. Put old tps back and it is back to the same problem I started with. What could be wrong?
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Sunday, April 5th, 2015 AT 5:08 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check for a vacuum leak either going to power brake or one of the other hoses off. Then clean throttle plate on both sides and iac hole with choke cleaner. Next time have a mechanic look at it not someone from auto parts as they don't know either.
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Monday, April 6th, 2015 AT 7:21 AM

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