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2004 Low Idle + oil light issue

Old 07-06-2016, 12:52 AM
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Join Date: Apr 2011
Location: Milwaukie, OR
Posts: 131
Default 2004 Low Idle + oil light issue

First I noticed Idle seems low when no accessories are on and even worse when A/C is turned on, Is there a way to adjust this?
I get no codes plus no chk engine light.
looks to be idling about 700 in park (will check with my Autel 539 B scanner to get exact Idle RPM
Also somewhere there is an issue with the Oil light as it comes on internittently and I can see the engine has oil pressure as I can see it running off of top of rockers quite well when looking in through the oil cap.
is there a specific place I shoudl look for a short or do the oil sending units go bad on these?
Old 07-06-2016, 06:30 PM
dcotter0579's Avatar
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Join Date: May 2008
Location: Detroit suburb
Posts: 4,993

Idle speed is controlled by the engine computer. There's no adjustment.

Replace the oil pressure switch. You'll probably find it's leaking, but, yes, it's a known problem.
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