Idle great cuts off with load

Nasty7.3 · Aug 30, 2013

The Truck is a 2008 6.4 with a egr delete dpf delete and a sparton. The truck idles fine but as soon as you start to drive it the truck cuts off and the rail pressure drops to nothing basically. Any Ideas?

Nasty7.3 · Sep 1, 2013

Stroked777 · Sep 3, 2013

Codes?

greasltn · Sep 3, 2013

Check your codes. Also check the base fuel pressure. If the low pressure pump is not working it will starve the HPFP and drop rail pressure.

Nasty7.3 · Sep 4, 2013

Low pressure is around 5 pounds at idle I haven't checked it with a load yet. I will tell you all the codes tomorrow.

Stroked777 · Sep 4, 2013

I believe that fuel pressure should be at 8-10

greasltn · Sep 4, 2013

Low pressure system specs are 3-7 psi. at idle, so you're in spec. If your filters are clogged you can get pressure at idle, but it will drop off with any kind of load.