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One day the engine idle just dropped i use the dual air and the oil light comes on and eventually the check engine light comes on i replaced the following,oil pump rebuilt,oil sender replaced,throttle body w/sensors replaced,i dont know what else to try .this car has a 3.8 liter engine and awd also replaced alternator and had engine computer updated.please help!

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You tell us that eventually the "check engine light" turn on, are you scanningn you ECU to knowed excalty what fault code are there? With thus code numer we can send other details. First check the fuel pump, fuel pressure and other components about this system..

Posted on Jul 12, 2010

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Posted on Jan 02, 2017

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Sounds more like an engine idle issue than a oil pressure issue. If the engine idle drops too low, the oil pump cannot provide sufficient oil pressure. If there is no oil light when the engine is idling normally, then there is no problem there.

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Locate the oil pressure sending unit and get a pressure test for yourself. If it is okay, replace oil pressure sending unit. If the pressure is 0. Replace the oil pump. Probably not 0 because engine would seize.

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Oil pressure drops to 0 at idle


OOO not good sounds like some of the head gasket got stuck somewhere, or the gauge or sender is bad or got knocked around when repairing the head gasket. I would check that first. If that checks out will need to drop the pan to see if something got stuck in the pickup tube,might as well change the pump while you are there. Or worst case some thing wrong with gasket job impeading oil flow back to bottom of the engine. Was the oil and filter changed ?if so pull out filter and see if an chunks are stuck in it now. And change oil and filter again. Sorry that was out of order I had a long day

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More maintenance history needed. Oil changed regularly, timing belt replaced at 60 K miles, Engine air filter & intake air hose inspection?
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Oil pressure drops at idle


If there is no engine noise associated with this ow oil press reading then replace the oil pressure sending unit on the engine, it is defective, this is common on all cars.

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check the engine oil level... you could possibly need to replace the oil pump soon... if you do not live in a cold climate i would consider using 30 or 50 weight oil. do NOT use that in a cold climate as the oil is like molasses when it gets cold.
that's only temporary. one other thing to consider is a clogged oil filter... when was the last time it was changed ?

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If the engine has a PCV valve it may be at fault causing the problem of oil in the air filter. It could also be the cause of the RPM drop.
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