My oil pressure is 90@700rpm and 100@1600rpm and my manifold pressure is very low any ideas whats going
oil pressure hi
Discussion in 'Peterbilt Forum' started by chickenlittle379, Jan 8, 2012.
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What kind of engine? Could be a barometric pressure sensor sending your gauges all whacked out.
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Caterpillar 3406E
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Herm, if its an E you most likely have a mechanical oil pressure gauge. Best thing to do would be take it to someone w/ a scanner / Cat ET. Toss a manual gauge on it next to the oil pressure sensor and compare readings from the ECM to the manual gauge. This will verify if you really do have an oil pressure problem, not a failed dash gauge. Could be a few things wrong causing you to make too much oil pressure, like sticking oil pump bypass valve. As far as the low boost, did both of these start happening @ the same time?
Last edited: Jan 9, 2012
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Well done had it tested and and had the same results on the manual and dash gauge and yes both started about the same time took it to a shop and they said it was the oil pump after I put the oil New oil pump on I still have the same problems
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