guys i brought my car in for the nct, which is the irish mot, and it failed on lambda emissions, i brought it to the garage and its the fse running too lean, n i cant get it to balance it wont give a steady reading, at high idle (2700rpm) its down really low then it shoots up in heavens, and they were tryin to adjust it and it kept jumpin ll over the place, so now i have to put back on the origional valve, ne one had this problem or know ho wi cud fix it without takin off the fse?

Can you tell what FSE means. I'm crap with acronyms.

i duno actually its the name of the company its the fse powerboost valve im talkin bout

Yeah, FSE are the manufacturers :D

Re the tickover problem, you might want to set it up using the guide thats on here somewhere

happened to me before, its also worth getting a guage for the FSE, so you know its set right :D

Ah I see. Mentle note to self, FSE = manufacture not name of part.

Ive had problems with mine jumping 20-30psi in pressure on hot summers days,not nice at all...
They arnt very reliable.