406oc.co.uk

Hi there ive just fitted a twin piston universal dump valve to my 406 and it doesn't seem to be working have i got the wrong one or is there some thing that iam not doing right can anyone help please!!!!!!

i think they use single piston valves thats what ive bought for mine. check you vac hose that goes to the dv and make sure its not leaking, another posability is that the spring in the dv might be to strong for the vac to pull open

cheeers for that ill have to get a single piston one and see how i get on.

get a video of yourself revving it and stick it on youtube for us