Oil Pressure for my 304 pegs the guage 80+ psi ?? - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > Oil Pressure for my 304 pegs the guage 80+ psi ??

FS: 2007-2013 Jeep Wrangler "HALO" Angel Eye KitFS: Wranger BRIGHT License Plate LED! Just $3! Great valueIntroducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Reply
Unread 10-07-2013, 09:28 AM   #1
myridge
Registered User
1979 CJ7 
 
Join Date: May 2008
Location: Eureka, MO
Posts: 65
Oil Pressure for my 304 pegs the guage 80+ psi ??

I put my CJ7 back together after 5 years of sitting in pieces in my garage and when I fired it up it pegs the gauge at 80+ psi, When I turn the ignition on it zeros out then once running it pegs. I am not complaining if its high higher is better than lower but can I trust it?

Its wired to using the solid purple wire to the sensor.

1979 cj7 304, TH400, Quadratrac

myridge is offline   Reply With Quote
Unread 10-07-2013, 10:06 AM   #2
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,847
What gauge are you using?
IF, it's the OEM Jeep gauge. Don't believe it.........

LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 10-07-2013, 12:01 PM   #3
PantherChicken
Registered User
1976 CJ7 
 
Join Date: Aug 2013
Location: Pike Road, Alabama
Posts: 20
Strangely enough my Jeep has the same issue. I just purchased the jeep a few months ago, and the oil pressure gauge, if it moved at all, just fluttered around aimlessly. As part of the sale, the PO gave me a new-in-box sending unit.

I replaced the sender this weekend, and now the guage sits right at 80psi whether the engine is idling or revved up. I assumed I just got the wrong sending unit, and it's not 'calibrated' to work with my gauge. The good news is that I know I have oil pressure now ;-)

(I'm running stock 304 V8 with stock gauges, the jeep is a 76 CJ7)
PantherChicken is offline   Reply With Quote
Unread 10-07-2013, 12:14 PM   #4
myridge
Registered User
1979 CJ7 
 
Join Date: May 2008
Location: Eureka, MO
Posts: 65
Yeah me too, Stock Gauges and NOS sending unit.
myridge is offline   Reply With Quote
Unread 10-07-2013, 01:07 PM   #5
MoneypitCJ5
Registered User
1977 CJ5 
 
Join Date: Mar 2013
Location: Florence, AL
Posts: 170
I'd get a mechanical gauge and try to verify the oil pressure. If it is 80+ I bet there are problems with the relief valve or the oil filter. I think its supposed to pop off at about 70 psi.
__________________
1973 VW Karmann-Ghia first car
2009 Challenger R/T 6MT, Flowmaster, inTune daily driver
1977 CJ5 304, 3MT - under construction
And many in between!
MoneypitCJ5 is offline   Reply With Quote
Unread 10-08-2013, 08:43 AM   #6
PantherChicken
Registered User
1976 CJ7 
 
Join Date: Aug 2013
Location: Pike Road, Alabama
Posts: 20
It's much more likely that there is a simple electrical issue or a mismatch between gauge and sender, IMHO.
PantherChicken is offline   Reply With Quote
Unread 10-08-2013, 08:45 AM   #7
myridge
Registered User
1979 CJ7 
 
Join Date: May 2008
Location: Eureka, MO
Posts: 65
I think you may be right. I have all sorts of electrical gremlins going on right now. I checked under the dash and its using the purple wire to the post on the guage and again under the hood.
myridge is offline   Reply With Quote
Unread 10-08-2013, 10:18 AM   #8
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,847
The ele oil psi gauge that AMC used in our CJ's is a well known POS.
I had 3 sending units die while under warranty.
Don't trust'em, ever.........
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 10-08-2013, 12:30 PM   #9
Rollbar
Registered User
1984 CJ8 
 
Join Date: Aug 2005
Location: Tarpon Springs, Florida
Posts: 2,420
Here ya go-have them in my CJ8 and no problems. Twenty nine bucks.



http://www.summitracing.com/parts/sum-g2925/overview

__________________
Project CJ8 Build Gallery <----Click

CJ8 Build Thread<---- Click
Rollbar is offline   Reply With Quote
Unread 10-08-2013, 08:07 PM   #10
WSS
Web Wheeler
1972 CJ5 
 
Join Date: Oct 2012
Location: Chino, Ca
Posts: 2,044
Tried and true Stewart Warner gauges. All mechanical, no senders.





WSS is offline   Reply With Quote
Unread 10-08-2013, 08:18 PM   #11
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,847
The Stewart Warner gauges made today are NOT what they once were.
The SW's in my Jeep are 25+ yrs old and are the best. The ones today are NOT.
http://en.wikipedia.org/wiki/Stewart-Warner

Today, if I wanted gauges. Here, is who I would deal with.
http://www.marshallinstruments.com/c...erformance.cfm

LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 10-08-2013, 08:31 PM   #12
WSS
Web Wheeler
1972 CJ5 
 
Join Date: Oct 2012
Location: Chino, Ca
Posts: 2,044
Quote:
Originally Posted by LumpyGrits View Post
The Stewart Warner gauges made today are NOT what they once were.
The SW's my Jeep are 25+ yrs old and are the best. The ones today are NOT.
http://en.wikipedia.org/wiki/Stewart-Warner

Today, if I wanted gauges. Here, is who I would deal with.
http://www.marshallinstruments.com/c...erformance.cfm

LG
The only new one I have is the water temp. The rest are period correct for the Jeep.

I can't believe you of all people quoting wikipedia?

WSS is offline   Reply With Quote
Unread 10-08-2013, 08:52 PM   #13
LumpyGrits
Registered User
1985 CJ7 
 
Join Date: Jul 2010
Location: The Mojave Desert Palmdale Ca. U.S.A.
Posts: 4,847
Yeah I know
BUT, this time they are 100% correct.
That is the ONLY reason I used'em.
Still, SW's of today are in name only............
LG
__________________
Have'n you along, is like loose'n 2 good men
LumpyGrits is offline   Reply With Quote
Unread 10-08-2013, 09:01 PM   #14
WSS
Web Wheeler
1972 CJ5 
 
Join Date: Oct 2012
Location: Chino, Ca
Posts: 2,044
In the field (of heavy equipment) they are still highly trusted and used. I have never had anything but good luck with them. I would prefer American made of course but being made in another country does not make it a bad product. Obviously my opinion, so buy and use what you trust.

Way back, they were literally made like a fine watch, by the hands (no CNC!) of very skilled craftsmen. Now it is just a guy who loads a pallet and pushes the send button. LOL
WSS is offline   Reply With Quote
Unread 10-09-2013, 06:33 AM   #15
gmakra
Registered User
1985 CJ7 
 
Join Date: Jun 2008
Location: Chicago area
Posts: 2,783
Seems to me that there is a lot of chatter brands of gauges but what if the relief valve on the oil pump is jammed closed and the gauge is reading correctly?
I would put any old gauge on the engine and verify the PSI and then come up with a plan of action.
gmakra is offline   Reply With Quote




Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.