Question about Cars & Trucks
I was leaking lots of oil and replaced the oil pressure switch. My gauge is running high but stays within the L-H at the higher end... If it aint broke...Don't fix it? Any thoughts appreciated.
Find out what the oil pressure is suposed to be at when idleing cold and hot and at a certain rpm. Then go get a mechanical gauge from any parts store and hook it up to see what is reads. I have noticed alot of time the switch is working ok, but the guage on the dash maybbe wrong.
Posted on Nov 25, 2014
For 50 years I never applied that theory,
nor does it make any sense
If you wait until something breaks & then have no
knowledge or experience & lots more damage,
your in a bad place, for no reason, in my world
Not everyone or today no one, works on cars,but the
pros & me & select few old time car guys
I take things apart that do work & are not
necessary to do so,that way you learn & have
a trouble free vehicle,as much as can be prevented
With today's technology your too busy with electronics
& keeping up, to have time for the mechanical, until you
can't wait any longer
First thought is NO ONE coming here show any vehicles
or much if any info
So your switch was leaking?
You replaced it & now is okey,no leak?
So why the different readings?
Is it the correct part?
Was the old part ever accurate- when new?
What should the gauge read?
The only important issue is--what is the actual oil
pressure at different temperature & engine speed
That is what you need to know,is there a problem
The gauge issue may stay a mystery,unless you want to
tour several dealers & repairs shops, for just a chat session
& I doubt they will give any advice if they even know,not
I would take the old switch apart- to learn how it works
If it is mechanical like a variable resistor type where you have
one wire to it & the threads are the ground,then you need to
look at scan tool data if avail or test with a volt meter by back
probing the wire to the sensor, to see what the voltage is,if you
can find or figure out what it should be at different pressures
You can also if careful, put an air hose nozzle & pressure on
both switches & an ohm meter or battery voltage & ground
to it, out of the vehicle & test them to compare
Posted on Nov 25, 2014
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Posted on Jan 02, 2017
SOURCE: oil pressure gauge reads past 80
now unless there is a very loud knocking of the motor which would mean that the engine's top end was not getting any oil I would say that your oil guage is sprung and needs replacing. a high pressure rating would indicate a restriction in the oil flow pasdt the sending unit or a plugged oil filter. if the filter were plugged you would know it because your enging would run tight in no time at all. replace the guage itself... please rate this........thanks
Posted on Sep 29, 2008
I don't know if this will help anyone, but i had a issue with my jeep running hot and check engine light coming on as well. After alot of trips to different shops - the last one found that there were two senors in the engine for the fan that need to be changed. Everyone would aways fine the one up top but not the second one. After that, have not had any other problems like it since.
Posted on Mar 23, 2009
The fuel pump on that model runs through the oil pressure switch so that if the truck looses oil pressure,It kills power to the fuel pump to prevent engine damage.you need to find the cause of the low oil pressure reading(possibly a bad oil switch).That would be the cheapest place to start,or have it checked with a mechanical gauge.Good luck,
Posted on Mar 30, 2009
I've seen pressure switches rust out and shoot a steady steam of oil out of them, so yes it could cause you to loose two quarts of oil. Book does not mention starter removal:
REMOVAL & INSTALLATION
Posted on Jun 23, 2009
Tips for a great answer:
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