P0087

Dieselcraft · Apr 25, 2012

Here's a story of me and a truck that I think I got figured out.
Truck has 159kmiles,dpf delete,h&s xrt pro. With latest updates
Truck came in with a check engine light no power
I checked base fuel psi=4 drops at acceleration
Performed fuel filter replacement no difference
Performed replacement of hfcm performed clearing of p0087
Re tested good low fuel psi=6 ,performed vacuum test no problem found
Droped fuel tank no restriction or any problems found.
Test drove found p0087
Performed data log with Ids found this at idle
Wavy frp 3900-7900
F-pcv 12-24%
http://www.youtube.com/watch?v=8a5avwl4K-0&t=24s
http://www.youtube.com/watch?v=TI3w_8iJEkw
Up and down up and down
I made some vids with I phone but they suck

I cleared dtc,cleared hp adaptive fuel tables, performed hp fuel system test=pass.
Data loged fuel system=npf
Let truck idle
Later found
The same problem again.
Turned off truck re started found no problem,
This seems to me as a intermittent f-pcv failure

I want some advice thanks

greasltn · Apr 26, 2012

Does it have an updated HPFP harness? If the harness has a bare spot on a wire it can short and cause a problem.

Dieselcraft · Apr 26, 2012

I thought of that but I have no blown fuse

Dieselcraft · May 10, 2012

Ok fellas. I got this one all figured out.
This customer called me Monday said truck died and will not start.
Had towed to shop found
Poo87,p2291
Performed diag found metal in fuel system
Checked lp fuel psi found 1psi at fuel cooler shearer valve.
Checked lp fuel psi at hfcm outlet. 7psi
Performed tear down of hpfp
Found pump water contaminated and failed