truck bogging/ stumble

[jsf350]

went to the track and at about 900- 1000' the truck would start bogging -- almost as if it was running out of fuel and then it would get some and run out again...

-the truck also has stalled out a couple of times while coming to a stop

- I did notice one time while driving and the motor stumbled the rail pressure guage was at 200 psi (yes 200 psi)

Only thing that was changed was the cp3--

What would be causing this? FCA sensor going bad?

Thanks

 

[massdiesel]

What was actual fuel psi from fass!!!! Just went thru this with a truck 2007 5.9

 

[kino_fab]

Sounds like your fass isn't keeping up with your fueling mods, or could be getting weak. What Fass pump are you using and what cp3 and injectors are you using?

 

[jsf350]

The pump is a FASS 200 (alittle over 1,000 miles on it, 1-2 months old)
I dont have a guage for fuel pressure to the cp3.

Scott- how old was the one you had an issue with?

injectors are 75% extrude honed
Wicked diesel stg 3 cp3
capped rail

I had a Floor It stg 3 cp3 and removed it because it was leaking from the lower port (o-ring) ..... The wickeds was installed while the cp3 goes back to John-

we have never had this issue before and 2 weeks ago we made 19+ passes at the track, without any issue.

I'm alittle pissed because i wanted to get into the 11's...... ran 12.1 @ 104 (11+ mph off normal trap speed):doh::nail: