[SinCityLocal]

I just recently rebuilt my 2005 5.7 and put a new Melling high volume oil pump on it. I intended to use the pressure spring with the stock value, but that got overlooked and the pump still has the high pressure spring in it. The oil pressure switch/sensor was damaged during the rebuild and would only read 0 psi or 50 psi, so I replaced it. Now I get an engine light and a high oil pressure code.

How are you guys with HV/HP pumps remedying this?

 

[Vincent.1]

Following thread

 

[Hemissary]

Even with the high pressure spring installed - the engine management system does not report an over-pressure. So the PID must be reporting high for an extended period of time - then triggering a DTC.

is the oil pressure sending unit brand new? It is the correct PN? Note; even brand new specifically oil pressure sending units can be faulty.

 

[IcarusLSC]

Aftermarket oil pressure sensors seem to be hit or miss with these cars too I've been seeing...

 

[SinCityLocal]

Even with the high pressure spring installed - the engine management system does not report an over-pressure. So the PID must be reporting high for an extended period of time - then triggering a DTC.

is the oil pressure sending unit brand new? It is the correct PN? Note; even brand new specifically oil pressure sending units can be faulty.

It is a new "Standard" brand sending unit. I cleared the code twice and haven't had a recurrence in two weeks. If it becomes a regular issue, I'll get an OEM unit and see if that resolves it.

 

[Korben]

I don't have any suggestions but I'm curious what oil pressure you're seeing?

 

[SinCityLocal]

I have seen upward of 80 psi cold, but I'm not sure what the threshold is to set the code.

 

[Hemissary]

80+ psi cold with the Melling pump is normal.