While driving my chev 454 truck the oil pressure went to 0 psi

ok the service manual shows all this,
is the cluster showing errors of any kind on engine oil? is this it?
31year old truck, maybe the engine serial number shows age of the 454cu-inch is different.
the senders for oil goes to the main oil gallery of most engines
and most engine V ,is on side of engine and near the oil filter.
the oil sender on the new truck is a switch that toggles at 7psi
lamp on below, lamp off above. a super simple design. then.
this sender uses TAN wire color code
the service manual shows the classic test for it
remove tan wire, meter lamp fails (keyon)
same wire grounded meter lamp works.
GAUGE FUSE NOT BLOWN
ON OFF TO 454 LAND AND EVOLUTION 30YEARS
7.4liter new jargon
checked VIN yet to see if if has VIN code for 454"?
facts
(complex only due to vast cars/trucks vette's used on)
Big blocks have two(3) locations. The one above the oil filter casting (the one you used) and one just above the pan rail at the left front of the engine.
the wire test is super simple. (the acid test we say)
if the tan wire test fails the wire is cut the gauge is bad or the fuse to the cluster is blown.
if you ground the tan P pin on the cluster connnect and it fails
the cluster is bad , fuse good
that is all there is.
the same oil port on the engine we test it for pressure correct.
using 60psi pressure gauge, 1/8" connect NPT.
cold pressure can be 50psi. (oil pump pressure relieve valve spec)



photos of 454 even cars with more options.







photo 22

I would start with the oil pressure sending unit. These can fail. Often replacing them will then have correct oil pressure readings. Oil filters (all of them) are designed to allow oil to flow through them or around the filter media if it's plugged thus not starving the engine of oil flow and pressure. So it is unlikely that is the problem.

yes,it reads oil pressure only,if its out as long as it was working fine before it went bye bye your fine,you won't blow up engine or break down.

Check the oil filter. The old gasket might be stuck on the engine (two gaskets stuck together), or the new gasket might be defective, misaligned or missing.

i recently went through the same problem, mine turned out to be a pressure seending unit, but i have also noticed that even after replacing the unit, that when my front main seal started going bad, it would alow pressure to release while decelerating

because your oil pressure rises to around 40psi when running and will leak at the weakest place,check your oil sending unit first and seals.






Tim

I just had the same problem with a malfunctioning gauge with a very oily sending unit. I went to Oreilly's auto and got a replacement sending unit for $38 and put it in and got the same results you did. I would have 40 psi at idle and it would drop to zero and throw the check gauges light when giving it throttle. I found some posts online that stated to only use official mopar sending units in these vehicles so I gave that a try. Problem solved!!! I now have 45-50 psi at idle and it climbs slightly when under throttle. The sending unit from Chrysler is around $52.

The oil pressure sending unit screws into the engine block so you will need to look between the oil pan and the head.I suggest that you try tightening your oil filter first.

If cleaning the engine does not work, replace the oil press. sending unit. These senders on Jeeps have had a history of problems where they will work one day and not the next day.

have them check the oil sending unit