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  oil pressure sending unit question

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Author Topic:   oil pressure sending unit question
project66
Gearhead

Posts: 246
From: Baton Rouge, LA
Registered: Jul 99

posted 06-30-2001 04:56 PM     Click Here to See the Profile for project66   Click Here to Email project66     Edit/Delete Message   Reply w/Quote
This is on a 302 out of a 68 Fairlane that is now sitting in my 66 Coupe. It has two sending units: the bell-shaped one (like I had on the original Mustang engine, and the smaller, screw in unit. Not sure, but figured he did this because he had an idiot light and also installed a gauge.

Current problem: I have a newly rebuilt 302 that I've just gotten to run. I have my stock oil pressure gauge connected to the bell-shaped sending unit. When I turn the key to the first stop, the gauge needle goes all the way to high (pegged), then when I start the engine it drops to low (pegged). Don't completely trust the reading I'm getting, but don't see how the gauge could be set up wrong.

Any advice or insight?

Thanks again-
JimO

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cpmaverick
Gearhead

Posts: 1666
From: Santa Clarita, CA
Registered: Jan 2000

posted 06-30-2001 05:35 PM     Click Here to See the Profile for cpmaverick   Click Here to Email cpmaverick     Edit/Delete Message   Reply w/Quote
if he installed an aftermarket gauge then the sending unit probably isn't correct for the gauge, try a new stock sending unit.

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lyle29464
Gearhead

Posts: 958
From: Mt. Pleasant S.C.
Registered: Mar 2000

posted 06-30-2001 11:36 PM     Click Here to See the Profile for lyle29464   Click Here to Email lyle29464     Edit/Delete Message   Reply w/Quote
sounds like that is the off or on sending unit for a light.

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project66
Gearhead

Posts: 246
From: Baton Rouge, LA
Registered: Jul 99

posted 06-30-2001 11:41 PM     Click Here to See the Profile for project66   Click Here to Email project66     Edit/Delete Message   Reply w/Quote
It really does, Lyle. I know the previous owner had a gauge though, and I've tried hooking the wire from the stock gauge to both senders.

Tomorrow, I'll either wire the VDO gauge or go get a stock sending unit. Just not comfortable running the new engine without an eye on my oil pressure.

thanks-
JimO

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