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1989 Toyota Corolla Rumbling noise upon turning engine off.

Tiny
I_COFT
  • MEMBER
  • 1989 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • MANUAL
  • 146,600 MILES
Occasionally upon turning the engine off, rumbling sounds and vibrations occur for a few seconds, which seem to be coming from either the motor itself or the intake manifold. To me it sounds very much like backfire, though its hard to pinpoint the exact location of the noise.
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Sunday, December 14th, 2008 AT 10:37 AM

3 Replies

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
Start by checking the mechanical timing. Is this a carb. Engine or FI?
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Sunday, December 14th, 2008 AT 9:23 PM
Tiny
I_COFT
  • MEMBER
  • 2 POSTS
Yes, Carb. This happens occasionally, especially during cold temps.
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Tuesday, December 16th, 2008 AT 3:48 AM
Tiny
MMPRINCE4000
  • MECHANIC
  • 8,548 POSTS
More than likely there is carbon build-up in combustion chambers causing "run-on".

You could rebuild the carb. And that should help, also take off the intake and clean it thouroughly. Also try some fuel system cleaner.
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Tuesday, December 16th, 2008 AT 9:24 AM

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