Surging and cutting out 1998 K2500 6.5 diesel Suburban

[jrsavoie]

I've never got a gauge set up. I've never been to to the point where I needed one for diagnostics before. Not that I didn't always want one in each vehicle.I always thought that should have been an OEM gauge.
The lift pump does put out a steady stream of fuel out the drain T while running.
I won't be messing with the Suburban now, til I find a transmission and get some other stuff caught up. I'll put the transmission in first and then get to checking the engine on the suburban. Unless I get a chance to go through the Suburban first. But it's on the bottom of my list right now. I'd like to check the glow plugs, compression and injectors.

LP going bad or not getting a full 12volts can cause the surging. What psi is your LP putting out?

 

[GM Guy]

I got a message back, its a 2wd.

 

[jrsavoie]

I got messages back also. I went back to the ad and it does say the trans is out of a c3500 Apparently neither of us noticed the little c

 

[Burning oil]

To swap tail shafts you need to gut the trans all the way. Might as well rebuild it at that point.

As far as LP go's, seeing onroad pressures is the best. At idle you can get what looks to be good, but onroad its a different animal.

 

[jrsavoie]

It'll also reveal fuel starvation do to an intermittent fuel tank strainer plugging problem. My 94 Dually ran crappy off and on for 6 months before I narrowed it down to the sock. It had some crud that would get sucked to the sock and then it would float away and the truck would run fine.

To swap tail shafts you need to gut the trans all the way. Might as well rebuild it at that point.

As far as LP go's, seeing onroad pressures is the best. At idle you can get what looks to be good, but onroad its a different animal.