im running a stage 3 saff 4x4 t34,dark greens,big intercooler and now and again it keeps over boosting, its really pissing me off now. what could be causing this to happen please help

 

[quote="dean sturgess"]im running a stage 3 saff 4x4 t34,dark greens,big intercooler and now and again it keeps over boosting, its really pissing me off now. what could be causing this to happen please help

WHAT are the signs as to you thinking it's over boosting some times, r u sure it's NOT the spark plugs being blown out when under load due to wrong type etc!

only a thought m8

 

i took mine to GGR with exactly the same problem, was solved by adjusting the actuator i believe nothing too major anyway!

 

Maybe a problem with the amal valve? Perhaps it's intermittantly sticking, causing too much air to be bled off - anyone had trouble with them before? Or a split in one of the thin pipes from turbo, via valve, to actuator? Either of these would cause the actuator to operate at a higher boost pressure than it should. Could be the actuator itself also, split/sticking, therefore not opening wastegate properly.

 

normally runs ok peaks around 1.8/1.9 and holds 1.5/1.6bar but the odd time the boost goes around to 2.5 bar which then hits the boost limit plugs are brand new harvey gibbs set the gap and fitted them,also new vacume pipe from amal valve.

 

I WOULDn't want mine boosting @ over 30psi any time on greens so best go and get it checked out! b4 it ends in

 

Can only really be amal valve, or actuator/wastegate then methinks. Get actuator tested for opening pressure. Check wastegate operating arm is moving freely with actuator rod disconnected. Could also try replacing amal valve with a bleed valve setup, even just to diagnose/eliminate amal valve as the cause.

 

well went and had a word with harvey gibbs today,he just told me to turn the boost down one turn

 

My 3 door maybe over boosting???? sometimes its as if the whole engine shuts down for a split second is that over boosting???????

 

sounds like it, but could be a few other things aswell....