Gauge reading backwards.....I think -
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post #1 of 4 Old 04-27-2014, 11:24 AM Thread Starter
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1986 CJ7 
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Gauge reading backwards.....I think

Okay the longer I have this jeep the dumber I think I'm getting. JK.
So correct me if I'm wrong but the higher the RPMs the higher the oil pressure correct? Well that's what I thought as well but the new oil pressure gauge I just put in reads the other way around. At Idol it runs about 50 to 55 pounds and at 2k it runs at about 10 to 15 pounds. At least that's what the gauges says. So I tried reversing the red and the purple a wire and then it doesn't work at all. I even got the light to work everything is great is this sending unit the problem?


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post #2 of 4 Old 04-27-2014, 11:48 AM
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1978 CJ5 
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Sender and guage not be matched to each other. Check the specs on each.
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post #3 of 4 Old 04-27-2014, 11:54 AM Thread Starter
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1986 CJ7 
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I'll need to call Quadratrac tomorrow. The gauge is a new Crown, the sending unit was on the jeep when a got it so I have no clue. Thanks for the help!
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post #4 of 4 Old 04-30-2014, 08:24 PM
Jerry Bransford
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2004 TJ Wrangler 
Join Date: Jan 2003
Location: Escondido, California
Posts: 69,017
I got a sender from AutoZone that caused the gauge to work backwards. Two of the three senders I bought that day had problems. Get a Mopar sender, too many aftermarket senders are junk.

When you have a choice, buy American made.
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