another fd with probs

[arrouk]

i have an intermittent fault on my fd, its my 2nd tubby, some times i get .7-.5-.7 some times i get .7-.5-.5ish some times i get .7-.5-.2 which is really upsetting but what started getting me worried was when after the change over my boost started pulsing between .2 and .5.

if i throttle off and reapply there are no probs and i get solid boost (if only .5bar)

other than this the car runs mint just run in after rebuild new plugs oil ect, i have a cat back air filters and a slightly larger inter-cooler, i also have an ecu but i have no idea what it is, can any one point me in the right direction to sort this out.  i think it may be a vac hose thing and i don\'t want to start with that if i don\'t have to but say la ve.

matt

[banned advertiser]

Problem is no one is going to pin point your problem, although it does sound like vaccum problem, but you wont know till after changing.

[Gman]

Sounds identical to a problem i had with my old FD, in the end it was taken to rotechnics who found which vac hose was causing problems.

[clive]

other than this the car runs mint just run in after rebuild new plugs oil ect
matt

Hi Matt,

You say its just run in so I would presume that it is  only recently that you have pushed the car to show this problem.

If so I would think about taking the car back to whoever built the engine as it could be an install problem.

If all is O/K from your description I would look for a problem with a sticking solenoid or perhaps the actuator on the second Turbo is "bleeding" back, I don\'t believe you have a vacuum problem as you wouldn\'t get onto the second Turbo at all unless its a kinked pipe thats moving about.

[allstaruk]

I have similar problems to this I\'m going to change all the vacuum hoses as I know there all hard and britte before trying to diagnose the problem.

[arrouk]

thanks for the input guys i was just hoping there might be an easy answer to try before i get into the rats nest.

matt