Still Hi Oil Pressure

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Rocky LaRochelle - 30 Jan 2006 04:41 GMT

Got a '96 Cherokee I6 with 114K miles, running synthetic oil and after a
little while the oil pressure gauge jumps around from 40 to over 80.
Sometimes it settles down, sometimes not. I've changed the oil filter and
replaced the oil, nothing shows up on the magnetic plug. I've cleaned the
contacts at the oil pressure sensor, didn't help. Any suggestions on what I
should try next? Thanks.
--Rocky
(rockylarochelle)spam(@)(gmail.com)

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billy ray - 30 Jan 2006 05:37 GMT

Temporarily install a mechanical gauge to find out the true oil pressure.

It is possible your cleaned sender is defective or dying but don't just
replace it without knowing the actual pressure output.. Many autoparts
stores will lend/lease you a mechanical gauge with a small deposit.

Oil pressure gauges acting oddly are not unusual..... check the pressure
with a mechanical gauge first.

> Got a '96 Cherokee I6 with 114K miles, running synthetic oil and after a
> little while the oil pressure gauge jumps around from 40 to over 80.
[quoted text clipped - 5 lines]
> --Rocky
> (rockylarochelle)spam(@)(gmail.com)

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Simon Juncal - 30 Jan 2006 06:26 GMT

> Got a '96 Cherokee I6 with 114K miles, running synthetic oil and after a
> little while the oil pressure gauge jumps around from 40 to over 80.
[quoted text clipped - 4 lines]
> --Rocky
> (rockylarochelle)spam(@)(gmail.com)

Mine did this too until I replaced the sender... this involves unpluging
the wire from the top unscrewing the sender, and replacing it with the
new one in kind... in other words it's easier than an oil change.

Signature

Simon
"I may be wrong, but I'm not uncertain." -- Robert A. Heinlein

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Drifter - 31 Jan 2006 00:48 GMT

>Got a '96 Cherokee I6 with 114K miles, running synthetic oil and after a
>little while the oil pressure gauge jumps around from 40 to over 80.
[quoted text clipped - 4 lines]
>--Rocky
>(rockylarochelle)spam(@)(gmail.com)

Probably a bad sending unit, mine did the same thing (97 Cherokee)
Still it wouldn't be a bad idea to double check with a mechanical unit
as well.
Drifter
"I've been here, I've been there..."

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