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Low Idling...

   
Old Aug 7, 2010 | 11:11 PM
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darkstallion_69's Avatar
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Default Low Idling...
It started today. My car idles at 700-800 rpm than drops to 400-500 and after a second goes back up. Sometimes when I go to take off its doing the drop and my car wants to shut off. Any Suggestions on what is the culprit.
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Old Aug 7, 2010 | 11:15 PM
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Check the fuel pressure, it may be a clogged fuel filter/pump. I don't know exactly what it's supposed to be on LT1 engines, put I'm sure it should be above 40 psi.
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Old Aug 7, 2010 | 11:23 PM
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Sounds like you have an IAC problem.
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Old Aug 8, 2010 | 08:32 AM
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I would guess either a IAC problem or you have a vacuum leak, maybe one of the plastic vacuum lines broke, this happens when they get old..WW
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Old Aug 8, 2010 | 02:01 PM
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Originally Posted by esham
Sounds like you have an IAC problem.
wheres the iac located?
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Old Aug 8, 2010 | 02:01 PM
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Originally Posted by WW7
I would guess either a IAC problem or you have a vacuum leak, maybe one of the plastic vacuum lines broke, this happens when they get old..WW
The plastic lines next to the fuel rails?
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Old Aug 8, 2010 | 02:03 PM
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Originally Posted by darkstallion_69
wheres the iac located?
It screws into the throttle body on the pass side. Mine has a big squarish connector.
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Old Aug 8, 2010 | 02:11 PM
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Open the throttle blades and check the tps.
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Old Aug 9, 2010 | 05:40 PM
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Originally Posted by tehcarguy
Check the fuel pressure, it may be a clogged fuel filter/pump. I don't know exactly what it's supposed to be on LT1 engines, put I'm sure it should be above 40 psi.
41-47 psi per GM 96 Vette FSM.

Jake
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