Corvette C4 Forum 1984 through 1996

low idle speed, about 6/7,000 rpm. scan tool?

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Old Jul 31, 2007 | 05:39 PM
  #1  
renegade664's Avatar
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Default low idle speed, about 6/7,000 rpm. scan tool?

Hey fellas! before i ask my question, i just want to thank everyone for helping me with my clutch. anywho, my 89 is idling pretty low, about 6 to 7ooo rpm. it used to idle at 8 but now its acting up. my service engine soon light has been on for quite a while now and i was wondering what scan tool will pull codes.

another thing, the first start of the day it fires right up, but after its the slightest bit warmed up it takes a couple revolutions to start. i smell fuel too. i have a feeling the two problems are related. thanks so much for your help, joe
 
Old Aug 1, 2007 | 07:46 AM
  #2  
LeesVette's Avatar
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Default RE: low idle speed, about 6/7,000 rpm. scan tool?

Fuel injectors. Ohm out fuel injectors and check fuel pressure. AutoZone will scan your car for free.
 
Old Aug 1, 2007 | 12:24 PM
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cwb
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Default RE: low idle speed, about 6/7,000 rpm. scan tool?

ORIGINAL: LeesVette

Fuel injectors. Ohm out fuel injectors and check fuel pressure. AutoZone will scan your car for free.
I'm agreein' here there, r'gade... Higher rev's from a lean fire, in turn, from weak injector pintle springs. Ever notice black burn (exhaust)after startin'a COLDmotor, which goes away in a moment? Dead giveaway for leaky injectors.

You can trip the codes yourself; search a few posts here for the procedure. You need a paper clip, or some needle nose pliers...
 
Old Aug 2, 2007 | 12:13 PM
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renegade664's Avatar
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Default RE: low idle speed, about 6/7,000 rpm. scan tool?

autozone huh? i had a feeling it was the fuel injectors. how do those things come out? i've taken a look at them and wasn't sure if the inbtake mainfold needs to come off.... i ment for those rpms to be hundreds no thousands but i guess you guys realized that. thanks for your help ill keep you posted.
 
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