What else could cause no oil pressure besides the turbo its not leakin there its got a new sending unit on it and it worked for a couple min and now nothing again so either the new sensor craped out or what I dunno I'm at a loss someone tell me where to look please, Oil pump maybe when its runnin it sounds fine just no pressure on the gauge.
Thanks Guys

 

Get a pressure guage (any kind of pressure guage), remove the 1/8" NPT plug on top of your oil filter and screw the guage in or better yet get some line, 1/8" npt fitting, some dot approved air brake hose (1/4" or 1/8" will work for you).

If you have oil in the crankcase you should have pressure - unless of course you oil pump died but I have never really heard of that happening on a Cummins.

 

Our 92 had a sender go bad when we were 400 miles from home on a delivery. I put a mechanical gauge on to confirm that it had pressure and replaced the sender when the trip was over. I worked for an auto parts store for 13 years and although it is rare sometimes the new senders can be defective. The other possibility is some trash got into the hole in the new sender preventing oil pressure from getting in.