If this is truly a ecu issue, it will not directly affect the true nature of the pressure at all. its just a logical read out due to the malfunctioning ecu but, the pump action is normal. if the engine is not showing signs of low or high pressure and the oil level is optimal, i see no reason to replace the ecu at this time. if your funds are limited, this isn't hurting anything at this time. its a fictitous reading due to the ECu issue.
Be sure to test the oil pumps properties. if they are ok, i woudl hold off on the ECu repair.
First test the engine oil pressure by removing the sending
unit and temporarily installing a mechanical oil gauge. Run the engine and
note pressure at normal engine temperature; at idle 15 to 20 pounds is okay.
Raise the engine speed to approximately 2000 rpm. The pressure should be 40
to 50 pounds. If the readings you get are lower, you may have a oil pump that
needs replacing.
To check for these conditions a manual oil pressure gauge
is needed. Locate
the oil pressure port near the engine oil filter. Remove the sender or switch
and install the oil pressure gauge. Start the engine and observe the gauge.
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Can you tell me what the normal oil pressure range should be and the best way yo test normal pump operation? Also, do you know the proper idle rpm range both in and out of drive? thanks
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