When Im driving around and push the clutch in to stop, or lug it any the oil pressure goes from normal to 0 instantly! the red "Check Gauges" light comes on. Put a new oil sending unit it like two weeks ago. Any ideas? New Duramax may be in my future.

 

Clogged filter or bad pump.

[sm=badidea.gif]. Get a Cummins.

 

Thanks for the input. Just had oil changed and new filter. So Maybe its the pump.

As for the cummins Duramax thing my dad use to have V8 Mack big truck with straight stacks on it sounded awesome. I like everything about the cummins except that its an I6 and not a V8. Thanks again

 

Always suspect the new part first. Why did you replace the oil pressure sending unit? Were you certain it was bad?

 

No I wasn't certain it was bad I read on here somewhere that the gauge will bounce around like that when they are going bad. So I replaced it but the problem is still occuring. Thanks

 

... an I6 that has better reliability and power than the V8's. Thats reason enough for me. But, it's America, you can buy anything you want thats out there on the market.

 

The pressure was bouncing around (and going to 0) so you replaced the sending unit? But it didn't fix it? Not a bad call. But I'd still verify pressure readings SOMEHOW before condemning the pump. Can you screw a manual pressure gage into the sending unit hole to monitor pressure directly ... something? ... beats digging around in the engine when it might be a simple wiring problem.

 

True. And FYI, the oil pressure sending unit is to the engines right of the distributor. Oh... darnit... you know that, because you already replaced it.
Also, for these engines (3.9L, 5.2L, and 5.9L) the oil pressure is: 6psi minimum at curb idle, 30-80psi at 3000RPM.

 

stupid question but have you checked the oil since it was changed? same thing happened to me. got the oil and everything changed. id let off the clutch and same thing would happen. come to find that theres no oil on my dipstick at all. i still to this day cant figure it out where it went. didnt seam to be leaking from any place. its not in my intake and i didnt burn it. maybe some **** drained my oil so ill blow my motor up. [:@]

 

Old military adage ... If it's stupid and it works ... it's not stupid.

Always check the simple stuff first.