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EFV-8 Club Forum / General Ford Discussion / Testing Gauges 1941 Ford DeLuxe

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Discussion Topic: Testing Gauges 1941 Ford DeLuxe

wilsonsk

08-07-2022 @ 12:06 PM

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I bought a NOS oil pressure gauge for my 1941 DeLuxe, the needle was broken on the one in the dash. I put in the new one but it isn’t working. How do I test the sending unit and the gauge?

Thanks,

Steve

wilsonsk

08-07-2022 @ 12:40 PM

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That mystery is solved, the connection on the sender was dirty, I was testing the sender resistance when it was running, after I reconnected it it worked fine, a little over 20 idling, almost goes to 50 revving it up. Not sure how accurate the dash gauges are but its in the middle idling and almost pegged revved up, that should indicate that I have plenty and not a problem.

ford38v8

08-07-2022 @ 8:25 PM

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You might still have a problem. I can’t imagine oil pressure being that high on a flathead. Ideas might be mismatch sender/gauge, 12v conversion issues, or oil viscosity?

Alan

40cpe

08-07-2022 @ 9:09 PM

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Are you getting those readings on cold oil, or running temp?

wilsonsk

08-08-2022 @ 6:08 PM

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That was barely warmed up (it takes a while), I drove it about 30 miles at 55-60 today, ran a little under 190 temp, at a stop sign it went down to 10-15 (a little over the line between 0 and 20, ran at about the line between 20 and 50 at 60 mph (30-35psi?).

ford38v8

08-08-2022 @ 6:35 PM

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That's more like it.

Alan

51woodie

08-09-2022 @ 6:50 AM

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Regarding the comment on high oil pressure, my stock 59AB runs at 20 psi idle, and 60 psi at speed on mechanical the mechanical gauge. The dash pressure gauge shows 1/4 at idle, and just over half way at speed. I was initially using 15-40, then switched to 10-30, because I thought the pressures were too high. Changing to a lower viscosity made no difference in the pressures. Note: It is best practice to disconnect the lead to the coil when testing is done on the gauges, so there is no damage done to the coil or points.

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