RS CR41G

when driving along in every gear the car starts jerking realy bad,its been doin this for awhile now,ive changed gearbox,clutch,clutch cable,gearbox and engine mount,ignition leads,and its still doing it,there is a good spark from all four spark plugs,any ideas on what else this could be?

RS CR41G

forgot to say its mfi aswel,

essexRSTSouthend

You getting fuel to all cylinders?
Timing set correctly on cam and distributor?
Spark leads in the correct order?

RS CR41G

yeah mate fuel to each cylinder,and good spark on all four,leads all correct,and timing top dead centre, its doing my head in now

Twins

iTrader: (18)

Have you changed the fuel filter lately,our tddi mondeo started doing this and was the fuel filter ,if it still does it after this ,check the fuel pump is not cutting out

RS CR41G

ok mate ill have to get one,cheers

essexRSTSouthend

How old the fuel?
Spark plugs in good condition?

all worth checking.hope you find the problem.

RS CR41G

its all new mate,was running fine then taken it off road for winter,when put back on road it started happening,the jerkin is that bad it makes the gears pop out in 5th,so i tryed a new gearbox and still the same,the only other thing it dos is backfire a bit on boost,

Micki

what set up are you running mate if your ECU is standard and your runing over 0.8 ish boost then your ECU wont be giving enough fuel.

RS CR41G

the ecu is chipped mate,and only running 12psi,it was sound at one point then when got it out of storage got all the juddering problems,ive just found out that the throttle postion senser is no good but not sure if this will cause the jerking? and also theres a air leak sound coming from around the inlet manifold,could this cause poor running?

Micki

change the sensor if no good mate but definatly find where air leak is coming from it will deffinatly cause bad running best way to find where its coming from is get a tin of wd40 and spray around the inlet manifold if the engine picks up a little in a certan area theres your leak,hope this helps

RS CR41G

ok mate i will try the wd40 way, cheers

RS CR41G

ive just tightened the inlet manifold nuts up,and the air leak sound as got louder and taken car for short little drive and the jerking as got worse,so i imagine this is the problem! goin to get new gasket! hope this solves it

Micki

sounds like it to me mate,let me know how you get on though,fingers crossed.

RS CR41G

sound mate i will defo let you now how get on cheers for the help,nice one!

crazycage

try filling the tank lol

jamie rst

iTrader: (1)

get it booked in some where for a set up mate could be a number of thing making it do this boost/fuel/air leak maybe a few thing together making it do this, i have heard of a few rst that was runnig fine on mfi took them off the road over winter and when they came back out they was running like a bag of sh!t

RS CR41G

the tank is always full,its a turbo so as to be full!

RS CR41G

soon as sorted air leak out mate ill be gettin it set up! got a new throttle postion senser coming tomorrow,and putting new gasket on,cheers for the advice jamie.

project rs

it sounds to me as if something has perished over the winter and caused the fueling to be knocked out or dirt has settled somewhere and blocked it

RAPID 3DR

mine also has a similer prob,wen sat at 30 mph it misses abit,but i also can here a air leak near the back of my inlet
would this be the problem??

RS CR41G

ive not ad time to put the new gasket on today so dont now if it is the gasket,i dont think the fuel system is blocked or got dirt in it because ive taken each injector out and each one is flowing fine,me mate sorted me a tps for free and got the new gasket for £4 so if is the problem,cheap and easy fix! lets hope so,