Corvette C4 Forum 1984 through 1996

Poor Idle - '90 L-98

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  #1  
Old 12-12-2008, 06:11 AM
RudeDog's Avatar
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Default Poor Idle - '90 L-98

All of a sudden, (naturally), my vette decides it doesn't want to idle. Used to start right up
when just turning the key and now to get it to start I have to pump the gas pedal. RPMs build ok, no hesitation but whenit goes into dead stop/idle it dies.

Fuel tank is full with BP Premium, Tune Up (plugs, vacuum ck, egr ) done a year and 1000 miles ago. Only thing I am thinking is could be an old fuel filter or maybe vacuum ?

Not throwing any codes, only check engine light when dies.

Any ideas ? Thank you.
 
  #2  
Old 12-14-2008, 10:31 PM
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Default RE: Poor Idle - '90 L-98

Check fuel pressure at rails to be sure it is within spec. Check IAC (idle air control).

CG
 
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Old 12-15-2008, 06:18 AM
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Default RE: Poor Idle - '90 L-98

Thank you Curious George. She has an appt. with her Doctor this Wedsday (depending
on weather) and I'll definitely mention those possibilities. Appreciate it.
 
  #4  
Old 01-02-2009, 05:38 AM
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Default RE: Poor Idle - '90 L-98

Mechanic said it could have been cause the car sat in the garage awhile and had to run to get computer idle speed to reprogram itself. Said it wouldn't throw a code for that.

He also replaced fuel filter as mine on the '90 was orig eqpt with 64M miles on it. Doing fine now.
 
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