Boost Problems

[allstaruk]

Hi

I fitted a boost gauge about a day ago after thinking that I had a few boost problems, and it confirmed my suspision. I have had a quick look at the pipes and all seem ok and well attached so I am now at a loss. What do I look at next.

The boost patten is 0.8-Slight Dip-0.5 so as far as I am aware when it hits 4500k the boost is dropping to 0.5. I feel a slight dip in power on the transition point.

I really am not sure where to start I am quite confident and can cope with most mechanics but not sure what I shold be looking for.

Any help would be good

Alan

[the lemster]

ok from what I can make of your problem you should get a slight dip in boost at about 4500- then a gain in boost as the secondary turbo comes online( about 4800) then it should increase back to 0.8 bar ( 10psi) from there...

if you get a dip at 4500 and then nothing back up the way then  the secondary turbo aint spooling up. this could be due to a pipe off or a blown turbo ( but you would know about that )

check all the pipes from the turbos and the vacuum piped fust behind/underneath the front strut brace if you have one fitted
its a little black box about 6 inches by 2 inches with two pipes in from the right and out from the other side... I had a similar thing and all it was was a pipe had come off here... it might be something in the rats nest or sollenoid or actuator or switch thing but pipes are cheaper so check them first...

good luck

[allstaruk]

The pipe\'s seem ok, I have had fiddle and they seem ok but i am gonna take them off and have a proper look in the daylight.

I have had one of the pipe\'s from the little black box pop of before and it doesn\'t feel like that,  when that pipe is off I don\'t feel the dip in power that is happening at the moment.