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68c10airstream · 01-31-2017, 10:25 PM

A mechanical gauge hooked up is a must, as mentioned before. Your oil pressure SENDER should be a 3 wire sender. One wire used for the gauge, and the remaining 2 wires used as a backup fuel pump 12 volt+ supply in case the fuel pump relay goes out (fails). A trouble code would be present for a failed fuel pump relay and you would detect a longer crank time to get started because oil pressure has to build up before the fuel pump would run.

If i went back into the pan of a small block i would weld the pick up tube to the pump for 2 reasons, can't move and potentially fall out and ruin the engine and do you think the press fit tube to pump is sealed 100 percent or could it possibly suck air into the pump. Easier to suck air than oil up the tube!! I believe the point where the tube meets the pump is out of the oil??

01-31-2017, 10:25 PM	#7
68c10airstream Registered User Join Date: Mar 2013 Location: Marquette michigan Posts: 828	Re: Oil pressure driving me crazy A mechanical gauge hooked up is a must, as mentioned before. Your oil pressure SENDER should be a 3 wire sender. One wire used for the gauge, and the remaining 2 wires used as a backup fuel pump 12 volt+ supply in case the fuel pump relay goes out (fails). A trouble code would be present for a failed fuel pump relay and you would detect a longer crank time to get started because oil pressure has to build up before the fuel pump would run. If i went back into the pan of a small block i would weld the pick up tube to the pump for 2 reasons, can't move and potentially fall out and ruin the engine and do you think the press fit tube to pump is sealed 100 percent or could it possibly suck air into the pump. Easier to suck air than oil up the tube!! I believe the point where the tube meets the pump is out of the oil??