what else can i do?

[dieselsubmariner]

ok..
i have a 95 f350 , stock with a bullydog 6 pos. switch.

truck surges very bad during start up until i idle it up to about 1000rpm for 5 sec.
this issue is ALL the time. no matter hot or cold.

Lately, the truck is also running a little rough when cold and smoking white on startup.
today i let it warm up and when i push the throttle hard, it smokes white and skipps a little.

this is , what i have done so far:

-changed oil and filter
- new ICP sensor (old one was bad)
- replaced gpr ( was bad)
- checked all harnesses for burns and ohmed everything out. (noticed, when i had the valve cover off, most connectors are wet inside.. is this normal ?)
- checked glow plugs and injectors with ohm meter.
- replaced all injector o-rings.(old ones did not look bad)
- cleaned screen in fuel pressure regulator (was clogged)

any idea what to do next ?

[85_305]

Sounds like uvch to me

[dieselsubmariner]

ok.. the extreme surge on each startup is gone
I unplugged the chip and it fixed it..


here some different issues i still have :
white smoke on start up and under high throttle, no load, i get a good amount of white smoke. can’t see anything while running

I checked the Fuel pressure with a old gauge i had and i can see a lot of bouncing on the gauge.. the average on idle is around 40 to 45 psi, but it drops to 20 at higher rpm.

any thoughts ?

[85_305]

FP seems low. I'd shim it. If the EBPV is engaged though, then yes it's gonna be a bit more smokey than usual.

[dieselsubmariner]

not quiet sure, what you mean by "shim it".

about the ebp valve.. it will be gone, once i rebuild my turbo and replace the down pipe.

what are the thoughts on wet connectors under the valve cover ? the harness looked good , nothing burned, also ohmed out good, but the connectors were oily inside..
but then again, why would oil get in , when it is sitting over night... and it be better after running a while

[85_305]

You can buy a shim or BB for the FPR to shim it which will bring FP up a good amount, unless the pump is just fried and it doesn't raise FP.

I personally wouldn't remove the ebpv... it's very useful in the cold.

[dieselsubmariner]

is there a write up somewhere about shimming the ipr ? where would i get the shims?

about the ebp valve: i was going to remove it, to eliminate back pressure. i also live in the south and don't think , i really need it. for the two weeks, it gets cold here, i plug the truck in...

[85_305]

Originally Posted by dieselsubmariner

is there a write up somewhere about shimming the ipr ? where would i get the shims?

about the ebp valve: i was going to remove it, to eliminate back pressure. i also live in the south and don't think , i really need it. for the two weeks, it gets cold here, i plug the truck in...

You shim your FPR, not IPR.

The backpressure thats accrued from the EBPV is like... in the fractions. You'll never notice it being gone in terms of backpressure/performance/mpg/overall flow.

An old, but helpful, thread:
Super Duty FPR Shim