Archived Surging - VP44 Symptom?

[EEdstrom]

Surging - Is it a VP44 Symptom?

I started getting the dead pedal and code P0216 about a month ago on my 1999 2500 so I know my VP44 is going. I was running about 6psi between the filter and the pump so I decided to replace the lift pump with the Galcier Diesel GFS-392. Got that on at midnight last night (great kit!) and am running about 20psi at idle. On the test drive this morning I am getting surging at idle while in gear. RPM varies up and down about a 100 rpm. Seems fine at speed. Is this just another sign on an almost dead VP44 or did I screw something up in my GFS-392 install?

I bought a replacement VP44 from mwfi.com and am having a local shop install it this week - don't know if should risk driving the 20 miles to the shop.



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99DCTD2500 Auto 4x4 3:54 Stock except K&N and GFS-392 lift pump kit

 

[Davidson]

EEdstrom, I dont think you will have any trouble driving the 20 miles to the shop. I had the dead pedal and the 0216 and drove the truck about 5000 miles before it got progressively worse and I changed it. Good Luck!!

Larry

 

[EEdstrom]

I'm wondering if the surging is a symptom of a bad VP44 or something else. It was not surging before i replaced the lift pump with the GFS-392 kit. I theorize that the additional pressure of the GFS-392 is compromising internal seals on an already weak VP44 and causing the surging. Any input?

 

[DMannon]

Sounds like you might be getting air in the fuel lines.



Try bumping the starter and listen to the Glacier pump as it pumps and builds pressure. Do you hear some random clicking from the pump area? That's the sound of your pump cavitating. Check all the new fittings you made for any leaks. It can also cavitate from a clogged or broken pickup in the tank.



I just replaced both my LP (with a GDP 392 ) and my injection pump. It would run with a lopey idle for about 5 minutes and quit. Then I'd have to bleed all the injectors to get it start.



I was about ready to drive the whole thing off a cliff until I dropped the tank and found a broken fuel pickup. Richard at Glacier helped me figure it out. Give him a call.

 

[Graphic man]

I have heard of surging on a bad VP44, now that you have the puel pressure that you need, it may be time to change the VP44



Scott