my sisters st 170 judders when driven wether its crusing at normal speeds or pulling off any ideas???

 

flywheel? there a dual mass

 

Does it make any unusual noises?

If it feels like its surging then it could be lambda sensor, mine used to do it til i changed the lambda!

 

it sounds like a diesel on tick over, has had the oxygen sensor replaced as the ecu showed it was at fault, also its very flat throughout the rev range

 

is this a common problem??

 

would appreciate replies on this also, my 170 has the same symptoms.

 

Flywheel....... and they are Ł300

 

Mine has the exact same fault, no warning light and a judder when above 3k revs.

Replaced lambda,crankshaft sensor,plugs,leads & coil pack to no avail.

Last night i changed the fuel filter and it is much better but not quite right stil. Spoke with a number of Ford specialists and they have all said the fuel pump is what needs changing.

Looking into this so will update when fitted....

 

That'll be the dual mass flywheel then!

 

Mate you need to be employed by every ford tuning specialist in the country becasue non of them suggested that!!

 

Fuel filter fitted and guess what......problem fixed!!!

 

My st170 also sounds like a diesel on tick over, did you ever figure out what it was??

 

My st170 also sounds like a diesel on tick over, did you ever figure out what it was??

 

The ST170 does have noisey top end due to the solid lifters and uprated cams. It does not sound anywhere near that of a diesel though

 

Does the noise go when you depress the clutch

 

No, but probably just getting used to the noises the car makes as standard. Thought it would sound smoother, thats all. Thanks.

 

hi my st170 judders in between 1000rpm to 2000rpm and when over 4000rpm it seems to lose power and won't rev rite up have already changed the fuel rail,fuel filter.crank sensor,air flow mass metre,plugs and yesterday the coil pack but still the same so i,m ready to crack up! anybody with any ideas would be much appreciated

 

that sounds like the imrc, look on the end of the inlet manifold and you will see a cable , there is a black plastic thing there, they are prone to wear and breaking etc,
the imrc is the inlet manifold runner controller, the is a solenoid on the bulk head which controls it all. its what gives the nice surge of power at 4000 rpm