******* **** is pissing me off hope some of you guys can help me out heres a video, and heres what ''i'' think its doing is its only getting fuel to one rotor, but how can this randomly be ? ive replaced the following parts with known good ones to see if these were the problem
n/a s5 maff
n326 trailing coil
460cc injectors ''primary's''
new ngk plugs
new main relay
ive checked the injector signals as well
also switched out ecus
ive also reved it up and the revs take forever to get to 5 grand than once it reaches 5 grand it acts like 2 step and back fires and if u give it a lot of gas it also back fires
much help would be great

http://www.turbobuick.com/forums/gen...o-failure.html
any one think its my walbro ?

 

You got an S5 Maf and a N326(S4) ECU?
..also 440?.CC injectors( they are regularly 460cc Primary).
Why do you have a walbro Pump on an N/A when they Run Rich as hell anyways.
..really,you should post ALL mods to the car and then Someone can Chime in with some Advice.
Right now,you have a "clusterFark" of things on that car that doesn't "co-habitate" with the other parts.

 

ive replaced the following parts with known good ones to see if these were the problem
n/a s5 maff
n326 trailing coil dont know why but they all say that
460cc injectors ''primary's''
new ngk plugs
new main relay
ive checked the injector signals as well
also switched out ecus

 

heres 4 things i have in mind
omp is bad witch is putting it in limp mode
or fuel pump is bad
or pressure sensor is bad
or fuel pump relay is casing the pump to fluctuate ?
gonna check all 4 tomorrow, i would like some one to drive to my house so i could use there pressure sensor

 

just clarify More about this car.
what is It?an S4 or S5?
which ECU are you using on the car?(is it original harness>?)
A failing Omp would put it into Limp mode IF it is an S5.(s4's do not have Limp mode).
also,do you have the original emissions equipment on the car?(or did you remove the Rat's nest)?
Is the Catalytic on the car?(If so is it Original)?

 

not trying to thread jack but i figured asking a question in an existing thread would be be better. sorry OP

i have an s4, was just wondering why thy dont have limp mode?

 

n374 chipped
S5 S5 S5 S5
no rats nest
no emissions
no cat

 

swaped fuel pump and pressure sensor still nothing does same ****

 

just saw the note about no cats.

cracked wire in the harness. check all the termination points

 

s5 has electronic OMP, so it's tied into the computer. it goes down/is removed, computer puts it in limp mode.

 

yeah but the type of limp mode it puts it in doesnt effect idle. i used to have a s5 n/a that had a bad omp drive motor and it would go into limp mode every 6miles and only effect the car under load. if you restarted the car it was fine for another 6 miles. my vote is a burgered up primary injector,low compression or bad ecu

 

+1 on bad ecu. I chipped an N374 with a speedlabs performance chip, and my car would run, idle, but would not boost. Find an N370 to try in there, it might save you a bunch of time & money.

Have you done a compression check?

Depending on the type of chip, it may have "limp mode" disabled so you can delete the omp.

 

no becuse ive tryed a n350 as well