idils fine hot or cold but sutters at 4 000 rpm, help Options

[import202]

the car is a st202 import 3sge and it was running rough on idel but now run fine hot or cold but when ya reach 4000 rpm it starts to hold back and sruges like it wants to go but cant all hose vacums seem to be good also the fuel pumps wines alot which dont thinks right so was lookin round under bonnet and sin the dreaded fse boost valve how do u remove any pics or help


thanks dave

[import202]

ok sort v know were fuel goes lol but what bout the vac pipe thats on the fse boost valve does that just go back to fpr

[Rusty]

How did it start? Have you done anything to your car?

[import202]

NOT HAD CAR LONG BUT IT STARTED MISSIN N POPPIN AND RUNNIN VERY ROUGH SO CHECKED LEADS PLUGS N PLUGS WERE OILY N N NUMBER 3 WAS WORSE SO CHAngrd THEM N IT RUN FINE TICK OVER N WILL REV STANDIN STILL FINE DRIVIN IT IS DIFF PULL OFF IS OK ISH BUT SOMETIMES WANT TO STALL THEN GOES WELL UNTILL TRY GIVE IT SOME GAS IT HOLDS BACK N SURGES FORWOARD LIKE JERKIN N WONT GO OVER 4 000 RP

ALSO HAS FSE BOOST VALVE WHICH THINK MAKIN FUEL PUMP WINE

THANKS

[Rusty]

Has the engine light come on at all?
What fuel pressure are you running? 41PSI is factory fuel pressure/what you should be running

you might have a high flow walbro or similar fuel pump that is making the wine or might just be a worn factory pump loosing pressure under load/revs

[import202]

no cel s at all but gonna get it scaned to check and unsure ov fuel pressure but will have to check as for fuel pump i think its just f**ked so gonna fined n install thats

thanks 4 input man cheers

[import202]

just waitin 4 pressure gauge 2 arrive then will no wot fuel pressuse is will post out come

[import202]

after all that it turns out to be a poorly made dizzy cap just got set fuel up now as bin messin with it n its runnin little rich as when come off gas padel it go faster before it slows ie brunin excess fuel off happy man now it pulls likw train again YIPPPEEEEEEEEEE

[Rusty]

thats great

[import202]

when i tried to check the fuel pressure with gauge fitted in the fse boost vavle but doesnt read any pressure at all any ideas on how to check usein the fse please was ruunin loads better but can still feel the surgin so thinkin change fuel filter and go from there any ideas cheers

[Rusty]

why are you running the fse boost valve?

[import202]

why are you running the fse boost valve?

just cus it came wit it already on i know it not worth runnin one unless u turbo,d lol any how my fuel makes funny noises some times n other time cant hear anythink n car runs better then noiise come bk n it runs poor plus if u try goin up hill all power gone as fuel pump cant keep pressuse so bin informed lol anyways got my new fuel pump today thanks to powertex proformance parts which was £44.75 far better then the £123 was quoted by local motor factors so goona do that tomorrow then go from ther but u think id be better off goin bk to standard FSE ?

THANK DAVE