oil pressure help needed

JERSEYTHUNDER · Jun 12, 2007

hi,
need a little advice....94 COBRA ...fire her up....oil pressure climbs right up....drive it around...still looking great.....about a 1/2 hour goes buy, stop the car,let it idle, drops to 0...all the way down....tap the gas, just past idle...right back up...let up....back down.
stock guages....when it drops my freaking heart jumps!

this happen to anyone else?
change sending unit?
go to mechanical?

looking for good news :noes:
JT

95-stang · Jun 12, 2007

I usually have an old mechanical handy, i just plumb it in, put the pipe through the side window and drive to see the readings.
Electric are not the best, or the most accurate, but its better to see if you have a problem before you start replacing everything.

ripper · Jun 12, 2007

I had that same thing happen to me in my old chevy work van. It was the sending unit.

scarface · Jun 12, 2007

I had this problem in my old truck... I put a high volume, high pressure oil pump in, and it didnt help. So I sold it. THe new owners said it turned out to be the cam bearings?

JERSEYTHUNDER · Jun 12, 2007

cam bearings?......your the second person that said that... :noes:
if it is the cam bearings, um..... :dunno:

JT

scarface · Jun 12, 2007

JERSEYTHUNDER said:
cam bearings?......your the second person that said that... :noes:
if it is the cam bearings, um..... :dunno:

JT

rebuild and machine work I believe.

JERSEYTHUNDER · Jun 12, 2007

I WAS HOPING THERE WAS A MAGIC OIL TREATMENT.......

scarface · Jun 12, 2007

JERSEYTHUNDER said:
I WAS HOPING THERE WAS A MAGIC OIL TREATMENT.......

sorry to disappoint you

ripper · Jun 13, 2007

Change the sending unit. Its cheap and easy. Unplug 1 wire, screw it out, little anti seaz, and put new one back in.

JERSEYTHUNDER · Jun 13, 2007

going to try replacing the unit this week end.....OEM or AFTERMARKET?

JT

ripper · Jun 13, 2007

scarface · Jun 13, 2007

OEM if you want to use the factory gauge...if you are truly concerned about it get an aftermarket gauge.

uncltrvlnmatt · Jun 16, 2007

Install a mechanical gauge and get a true reading on the oil presure. If you are still getting a very low reading, most likely it is a bearing problem. How many miles on the engine?

JERSEYTHUNDER · Jun 17, 2007

How many miles on the engine?

LMAO...290,000 MILES... :hammer:

i know. i know.....it's do

BUT!! it still runs great, doesn't knock,tap,burn,leak...etc.
just went to a 10/40 with lucas oil treatment....it may have cleared the problem, i may have went to light with 5/20.
tried the lighter to see what would happen.... :aresehole:

THESE FREAKING 5.0 ARE GREAT!!!!

JT

Downshift · Jun 17, 2007

290k in miles or Kilo? Thats beastly mileage man. Thats 290 original on the motor or the body? Pretty insane that car was driven A LOT haha. Hopefully you got it fixed for NOW, I wouldnt be angry if the engine needed a rebuild soon though.

95PGTTech · Jun 17, 2007

scarface said:
I had this problem in my old truck... I put a high volume, high pressure oil pump in, and it didnt help. So I sold it. THe new owners said it turned out to be the cam bearings?

it is possible...as we all know, pressure is the resistance to flow. so if the camshaft bearings (on, say, an OHV engine) are worn and have larger passages for oil than stock, the vehicle will lose oil pressure.

this is not uncommon on modular motors from my dealership experiences.

JERSEYTHUNDER · Jun 18, 2007

290K MILES.......yep motor has never been touch, except for a timing chain and dist.

rear completely rebuilt....

lots of Florida blasts!!!!. :banana: :banana: :banana:....from OHIO... :drunk: :drunk:
picked it up from a guy that wanted one of my bikes....now it's my 17yr old daughters car
kind of a daddy/daughter project...we're both having fun...

JT

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