1988 TOYOTA SUPRA ENGINE IDLE

  • Tiny
  • earl indian
  • 1988 Toyota Supra

Engine Performance problem
1988 Toyota Supra 6 cyl Two Wheel Drive Automatic

engine idle at 1000 rpm up to 2000 down to 1000 back up to 2000 unstable I changed the oil washed the motor have not been able to correct the idle impossible to drive have drided everything out it has been a month have blown with compress air every hose going in to throttle body no blockage I think

1988 Toyota Supra

Updated this is for Bob & Ken you said to remove the idle air control valve in my repair manual it is called a idle speed control valve (isc)
i hope this is the same thing I did remove it from the vehicle and cleaned it I also tested the throttle position sensor and airflow meter which are in repair manual specs what next

Wednesday, November 26th, 2008 AT 1:16 PM

3 Answers

  • Tiny
  • rasmataz
  • Member

For a start remove the idle air control valve and clean it out-Test the throttle position sensor and airflow meter using the repair manual specs then comeback with results this is where we start to find this culprit.

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Wednesday, November 26th, 2008 AT 3:20 PM
  • Tiny
  • rasmataz
  • Member

When was the last time you had it tune-up?

Check the fuel pressure with and w/o the pressure regulator, PCV and EGR valves and vacuum leaks-Test the oxygen sensor and fuel injector/s

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Tuesday, December 2nd, 2008 AT 12:37 PM
  • Tiny
  • rasmataz
  • Member

If above checks out could be the idle air control valve itself even if its cleaned out if it continues to surge-

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Tuesday, December 2nd, 2008 AT 12:48 PM

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