I have a Series 2 RS Turbo which has developed a problem. It will boost then when you hit say 15psi it shudders and erally holds back, no power at all. The boost becomes erratic and usuall drops down. Sometimes it will pop and bang and go no higher than 10psi. I have tried a new actuator which hasnt helped. Any Ideas?????

 

check your boost hoses especially the one going from your metering head to turbo, found that mine has gone so soft it's collapsing as when the turbo comes on full boost it's sucking in lots of air and sucks the hose closed

also check your dizzy as these commonly go

Dave

 

Just to let those know wh may have the same problem, i think it was the coil, i have changed this and it it running sweet again. Nice cheap fix

 

also check the bottom hose from the intercooler, sounds like a problem i had that bugged me for ages an cost me a fortune till i found it.

 

also check the bottom hose from the intercooler, sounds like a problem i had that bugged me for ages an cost me a fortune till i found it.
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this is a problem i have had too fixed with an alloy sleeve inside the hose

 

I'm getting this problem and don't know why. Just after my set up aswell

 

Ive experienced the same, but no luck sorting it yet.