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1987 Toyota Corolla FX Cold start low idle

Tiny
BISHALPUN
  • MEMBER
  • 1987 TOYOTA COROLLA
  • 4 CYL
  • 2WD
  • MANUAL
  • 107,800 MILES
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
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Monday, June 20th, 2011 AT 8:25 AM

9 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
EFI or Carb fuel system?
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Monday, June 20th, 2011 AT 8:58 AM
Tiny
BISHALPUN
  • MEMBER
  • 9 POSTS
It's EFI.
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Monday, June 20th, 2011 AT 12:23 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Have the throttle body cleaned and retest.
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Monday, June 20th, 2011 AT 12:27 PM
Tiny
BISHALPUN
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  • 9 POSTS
Which spray or chemical is used to clean the throttle?
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Monday, June 20th, 2011 AT 12:30 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Carb cleaner would do nicely.
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Monday, June 20th, 2011 AT 1:48 PM
Tiny
BISHALPUN
  • MEMBER
  • 9 POSTS
I cleaned the throttle body. But still below 500rpm during starts and slowly goes to 900rpm.
Do I need to replace my butterfly?
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Tuesday, June 21st, 2011 AT 1:52 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the airflow meter and the TPS sensor
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Tuesday, June 21st, 2011 AT 7:17 AM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
One more thing to check would be the Engine Coolant Temperature sensor.
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Tuesday, June 21st, 2011 AT 11:17 AM
Tiny
BISHALPUN
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  • 9 POSTS
Thanks, I will check the engine coolant temperature sensor.
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Tuesday, June 21st, 2011 AT 1:09 PM

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