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post #1 of 9 Old 03-25-2013, 01:10 PM Thread Starter
mattjlin
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high oil pressure

My oil pressure guage says I'm running over 80psi! Is this something to worry about? It just started reading like this today. Motor sounds fine, idle is fine,doesn't really seem any different. Any ideas about whats happening?

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post #2 of 9 Old 03-25-2013, 01:29 PM
Hudson
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Quote:
Originally Posted by mattjlin
My oil pressure guage says I'm running over 80psi! Is this something to worry about? It just started reading like this today. Motor sounds fine, idle is fine,doesn't really seem any different. Any ideas about whats happening?
Most common cause of that is a bad pressure sending unit.

Can be replaced for about $25. It's located directly above the oil filter. Shouldn't take more than 5 minutes to change

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post #3 of 9 Old 03-25-2013, 04:01 PM
CCKen
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Suggest you rent (deposit refund) a mechanic's diagnostic oil pressure gauge from O'reilly, advance, etc., auto parts store and check your oil pressure - before investing in an oil pressure sendor.
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post #4 of 9 Old 03-25-2013, 07:35 PM
Charley3
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Could be a bad sending unit.

However, when I had high oil presure in my 96 XJ, it was a clogged K&N oil filter (that was not due to be changed yet).
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post #5 of 9 Old 03-25-2013, 08:44 PM
Flyordie
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This is why I just dumped the sender. Mine was located at the oil galley port right next to cylinder 1. I had to pull the Alternator and Compressor to get even get to it. I just dumped the sender and went to a mechanical gauge mounted under the dash. :-)
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post #6 of 9 Old 03-27-2013, 01:17 AM
Charley3
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High filtration filters like K & N and others that filter smaller than normal particles, are prone to clogging.

Wix filters or Napa Gold filters are the best IMO and priced right. They filter as small a particles as makes sense, but no smaller.

Note: Napa Gold are made by Wix. Same filter.

Buy Wix brand. It's less money than paying Napa for same filter.
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post #7 of 9 Old 03-27-2013, 02:24 PM
BigBadWuf
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Hastings is also a great oil filter brand, and if you have fisher auto parts where you live there filters are hastings but like $3 cheaper. Thats what i run, used to run purolater but there quality has declined lately. ( no drainback valve) i dont know how much that matters on 4.0s but on my nissan with a brand new motor it would always make it tick on startup, switched to hastings and never had a problem again.
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post #8 of 9 Old 03-31-2013, 10:27 AM Thread Starter
mattjlin
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my oil filter is an stp. anyone have any issues with these?
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post #9 of 9 Old 03-31-2013, 10:42 AM
dmill89
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Quote:
Originally Posted by mattjlin View Post
my oil filter is an stp. anyone have any issues with these?
Those are pretty bad. They have felt end-caps that are poorly adhered to the filter-media and poor anti-drain back valves. WIX, Moper, Purolator, Napa Gold (rebranded-WIX) are generally the recommended filter brands. If you want to go with an oversized filter the Motocraft (Ford) FL-1A is also an excellent option (This filter is used on the Ford 302, it is the same diameter as the standard Mopar filter but much longer/taller giving a larger capacity).
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