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1992 Toyota Corolla rough idle

Tiny
GEET
  • MEMBER
  • 1992 TOYOTA COROLLA
  • 4 CYL
  • FWD
  • MANUAL
  • 150,000 MILES
My car goes off if it has run for more than one hour. It fails to start. Then after start I push on accelerator hard for some time then it becomes normal. The problem does not show when at mechanic. There no vacuum leak. Can it be my fuel pump failing? How to know that ECU is failing. On diagnosis there is no trouble code. It runs rough. Thanks a lot
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Monday, November 30th, 2009 AT 10:32 AM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
When was last tune up? (Plugs, wires).

I would also remove and clean the throttle body, over time they get carboned up.

When was timing belt replaced? Inspect timing belt for missing teeth.

Remove valve cover and rotate each cylinder to firing position and check shim clearence, on cold engine intake clearence is.008 and exhaust is.010.

Fuel presure check requires a special tool set.

I would not be concerned with ECM at this point.
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Tuesday, December 1st, 2009 AT 8:12 AM

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