NEED ADVICE ASAP--INJECTOR ISSUES OR ?

[korg70kbc]

my truck has been running rough (?) in the past 2 weeks I checked fuel filter, etc etc.
So, I threw the AE on it last nite & found that my injector control pressure has dropped from .8 to .2
I NEED to go out & am not sure if I drive this thing ''choking' for fuel like it is how much more damage i will do!!!

[korg70kbc]

THANKS GUYS! WOW, zero responses. I won't drive it till I check the rest of the info I got off the scanner............but I'm surprised no one came back with some other things for me to check ie; fuel pump, gas tank etc.
Pretty disappointed
I guess I could of gotten all the #'s right away & gone into a full description of what happened & how fast it happened, but I needed to go to a appointment & wanted to know what damage would occur............

[billelf123]

ICP may be bad, do you have any mods that increase injector pressure? Also I would make sure you do not have any leaks in your MAP sensor boost line.

[jcs]

I dont know where you should look next how rough is it running like just a little miss, is it smoking any, do you have a loss of power what year is your rig and how many miles

[korg70kbc]

Originally Posted by billelf123

ICP may be bad, do you have any mods that increase injector pressure? Also I would make sure you do not have any leaks in your MAP sensor boost line.

I have no mods to speak of. No leaks, ICP was at .84v on the 16th dropped to .20v. ICP pressure has dropped from 491 to 463.72 psi. It is actually jumping all over the place.
I also have barometric pressure down to 4.31v, I am not getting any fuel readings like before., pressure, pulse width which was reading before, mass fuel desired.
Just need to know where to start! fuel bowl clean, no chunks, fuel clear
. It seems as if something is clogged. It has drastically changed in performance in 2 weeks
I have only gotten 1 fuel related code & thats P0093-Fuel system leak detected-large leak and other codes related to speed, etc.
any help on where to start checking would be helpful
thanks

[korg70kbc]

Originally Posted by jcs

I dont know where you should look next how rough is it running like just a little miss, is it smoking any, do you have a loss of power what year is your rig and how many miles

it WAS only running "rough" at higher speeds, up hill etc. NO SMOKE, well once. It never smokes anymore. Its a 1999.5 w/180k.
Its very strange that my boost is b/t 17 & 20, & no gauges move AT ALL when it "chokes", thats why I feel like something is clogged.
Last night was the 1st time I worried about making it home. If I jumped on the throttle, it got worse. so I cruised home very slow. I've also noticed a drop in MPG's
& 1 more code b1203-fuel sender circuit short to battery. I am supposed to be replacing my fuse panel, but haven't had the chance yet & that was only due to window relay problems.

[billelf123]

P0093 Fuel Sys Leak Detected - Large Leak

Could be a clogged fuel tank pick-up or or possibly a bad lift pump? Fuel pressure return spring can weaken over time and may be allowing fuel to flow back to the tank lowering your fuel bowl pressure. Doesn't cost anything to check these things out before changing a bunch of parts.

[korg70kbc]

Originally Posted by billelf123

P0093 Fuel Sys Leak Detected - Large Leak

Could be a clogged fuel tank pick-up or or possibly a bad lift pump? Fuel pressure return spring can weaken over time and may be allowing fuel to flow back to the tank lowering your fuel bowl pressure. Doesn't cost anything to check these things out before changing a bunch of parts.

I wondered about the pick up, can this be checked with a FULL tank? I of course filled up b4 this went south on me.........
I also wonder about the fuel pump. I just need to know the area (part) to check & I'll search my ford disk for the procedure. It takes me a while, but I've gotten this truck to go from nothing to LOTS of power in just a few months.
No thanks to my previous mechanics..................

[billelf123]

I wondered about the pick up, can this be checked with a FULL tank?

Tank will need to be dropped to inspect the fuel pick-up. A full tank will make the job allot more difficult. I would recommend siphoning first.

I also wonder about the fuel pump. I just need to know the area (part) to check

Located driver side inside the frame rail, you cant miss it!

[korg70kbc]

Originally Posted by billelf123

Tank will need to be dropped to inspect the fuel pick-up.
I was afraid of that


Located driver side inside the frame rail, you cant miss it!

Yes, but what do I inspect? I know there is a screen in the regulator, but where?

AHHHHHHHHHHHHHHHHHH what I would give for a decent mechanic!!!!
thanks for the input