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Oil Pressure flucuations

 
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Old 13 Jul 2011, 11:50 am
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Default Oil Pressure flucuations

The oil warning light and buzzer are coming on intermittently at idle after the engine is at operating temperature. Engine (2.4) has 137K miles on it. Checking for fault codes shows none. I pulled the oil pressure sending unit and installed a mechanical oil pressure gauge. From a cold start the oil pressure was 84psi. Under moderate acceleration it peeked at 95 psi and then settled in to 50 to 60psi and 30 psi at idle with the engine at normal operating temperature. This seems pretty normal to me. I have purchased an OEM oil pressure sending unit and am going to install it today. I'm replacing the sending unit even though it's not throwing a fault code. I think it's probable that the sending unit could be bad w/o showing a fault code.

I'm just thinking out loud here and wondering if I have missed something before I install the new sending unit this afternoon.

Thanks

Steve
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Old 13 Jul 2011, 02:24 pm
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Default Re: Oil Pressure flucuations

sounds like a bad sending unit.
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Old 13 Jul 2011, 03:34 pm
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Default Re: Oil Pressure flucuations

I haven't had it happen to me....yet......but it is not uncommon for the sending unit to fail. Since you put in the mechanical gauge and your pressure is good, you are on the right track.

I don't think PT's have many issues with oil pressure. Pretty stout engines unless you overheat them. I am at 189K on mine and it runs great
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