Oil Pressure Gauge Problem
01-06-2016, 11:46 AM
#1
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Location: Midlothian, Virginia
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Year: 2002
Model: Grand Cherokee
Engine: 4.0 I-6
Oil Pressure Gauge Problem
I have a problem with the oil pressure gauge in my Grand Cherokee. I had to replace the sending unit (4.0 liter engine). The new one worked fine for a day or two then the reading dropped from 40-50 to 10-20. Took that one back and got another. Same thing happened again. Do I have to get the Mopar part or am I missing something else? Any suggestions would be appreciated.
01-06-2016, 09:34 PM
#3
Old fart with a wrench
YES....GO MOPAR!! There was a change later in WJ production where the oil pressure sending unit was just a switch, not an actually pressure reader. I bought a NAPA Premium one and all it EVER did was read 30 psi!
01-09-2016, 08:21 PM
#4
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Location: Dutchess county NY
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Year: 2004
Model: Grand Cherokee
Engine: 4.7
I tried to replace my switch today but couldnt get the connector off...04 4.7...gonna try again tomorrow after i go buy a 27mm deep socket ( didn't have that anyway )
01-10-2016, 10:00 AM
#5
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Year: 1993
Model: Grand Cherokee
Engine: 5.2L
Originally Posted by Rooch1008
I tried to replace my switch today but couldnt get the connector off...04 4.7...gonna try again tomorrow after i go buy a 27mm deep socket ( didn't have that anyway )
01-10-2016, 09:04 PM
#6
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Location: Dutchess county NY
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Year: 2004
Model: Grand Cherokee
Engine: 4.7
I actually bought a 1 1/16 deep socket for $10 bucks after the guy at the auto parts store tried to sell me a "special" oil pressure socket...it worked just fine...changed it in 5 minutes and gauge works like it should
01-10-2016, 09:15 PM
#7
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Year: 1993
Model: Grand Cherokee
Engine: 5.2L
Originally Posted by Rooch1008
I actually bought a 1 1/16 deep socket for $10 bucks after the guy at the auto parts store tried to sell me a "special" oil pressure socket...it worked just fine...changed it in 5 minutes and gauge works like it should
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