1993 Toyota Corolla Vacuum noise/check engine light

Tiny
ROBERTSIDNEY
  • MEMBER
  • 1993 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 171,000 MILES
Dear sir, I am writing see what can be wrong. My check engine light came on and I did like suggested and had the codes read. I replaced the oxygen sensor, air temp, coolant, and map sensor. My car still sometimes seem to run rich. I somtimes will be driving and the check engine light comes on and then a strong vacuum sound happens and the light goes off? Is this an EGR vacuum solenoid or is it the throttle getting stuck open or shut? Maybe it's neither.
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Saturday, November 7th, 2009 AT 2:56 PM

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Tiny
MMPRINCE4000
  • EXPERT
Could be an intake manifold leak, injector seal leak etc.

I would check the intake and injector gaskets, look for cracks, check intake manifold bolts for looseness.

The EGR will function at steady speed and meters a small amount of exhaust gases into intake to reduce NOx emmissions.

I would remove EGR and clean it up, replace gasket.

What code are you getting?
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Sunday, November 8th, 2009 AT 8:14 AM

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