1991 Toyota Corolla ERRATIC RPM

Tiny
ARUGUT
  • MEMBER
  • 1991 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • MANUAL
  • 133,000 MILES
Hi pple.I have problem. My idling seems to have a big problem.I just noticed yesterday that when turn on the light the idling lowers from 1000 rpm to arnd 600 rpm. When winding up the power windows the rev goes down. When I disengage the gear at high speeds let's say when coming to a stop the idling drops so hard the engine goes off. At high temperatures the rpm's are so low. It even goes off at times. What could be the problem.I really appreciate ur answers.
Wednesday, August 20th, 2008 AT 7:33 AM

1 Reply

Tiny
KHLOW2008
  • MECHANIC
  • 41,814 POSTS
Hi arugut,

The engine seems to be idling very badly and electrical load can get the rpm tumbling.

I would advise checking
1. Engine compression, might be low.
2. Idling system, clogged throttle body or IAC, etc.
3. Ignition timing.
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Wednesday, August 20th, 2008 AT 9:21 AM

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