Hello
My 2wd cosworth has started to have intermitant boosting problems. One minute full boost one minute no boost and alot of sucking sometimes lower boost. Normally ok from cold fine then goes off and dont normally come back on till re started after cooled.

What to try to eliminate

Dump valve do i take off?
Amal Valve do i un plug?

What can i try

Thanks
Ian

 

Boost leak perhaps? Although if this is the case it makes the turbo work harder to achieve the same target boost pressure! No unplugging the Amal will LOWER the boost pressure!

Is the actuator good?

Martin

 

how do i test the actuator was on the car when i bought it and looks new!

Could it be a boost leak as one minute fine the other as if no boost. the sucking is the air filter

 

the best man to asked is joe@ GSMOTOSPORT 07940 181847
My mate had same sort of thing. joe told him what to do on the phone to sorted it. he always helpful good luck mate

 

Lol thats normal for the air filter, it's kind of hard unless you have a pump etc to test, they do loose there strength after a while.

Martin

 

What Dump Valve is it??

 

Hi Matt Bailey piston type not dia not very old worked fine on me last car

 

never overlook a dump valve as they still can leak, blank it it off and try it

 

Will give it a go but otherwise gonna dump it at steve scotts as its proper doing me head in and got track days looming