1987 Toyota Corolla FX Cold start low idle

1987 TOYOTA COROLLA
107,800 MILES • 4 CYL • 2WD • MANUAL
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BISHALPUN
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Hello all,

I have toyota corolla 1987FX. While starting with cold engine my engine rpm is below 500 and after 4-5mins of warmup it goes around 800rpm.
Can anyone tell me what;s wrong. After during cold start the engine rpm should be above 1000. Any help?

Thank you
Bishal
Jun 20, 2011 at 1:25 AM
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RASMATAZ
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EFI or Carb fuel system?
Jun 20, 2011 at 1:58 AM
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BISHALPUN
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It's EFI.
Jun 20, 2011 at 5:23 AM
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KHLOW2008
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Have the throttle body cleaned and retest.

Jun 20, 2011 at 5:27 AM
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BISHALPUN
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Which spray or chemical is used to clean the throttle?
Jun 20, 2011 at 5:30 AM
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KHLOW2008
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Carb cleaner would do nicely.
Jun 20, 2011 at 6:48 AM
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BISHALPUN
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I cleaned the throttle body. But still below 500rpm during starts and slowly goes to 900rpm.
Do I need to replace my butterfly?
Jun 20, 2011 at 6:52 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Check and test the airflow meter and the TPS sensor
Jun 21, 2011 at 12:17 AM
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KHLOW2008
  • ✓Experienced Mechanic
  • 41,812 POSTS
One more thing to check would be the Engine Coolant Temperature sensor.
Jun 21, 2011 at 4:17 AM
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BISHALPUN
  • MEMBER
  • 9 POSTS
Thanks, I will check the engine coolant temperature sensor.
Jun 21, 2011 at 6:09 AM
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