having problems with a gas research blow thru turbo setup
in a 180b
on boost the mixer holds on full throttle
have extra return spings but still holds on(very scary)
has any one had this problem??
any info would help
tommo

have you tried it without boost to see if it sticks? was the throttle body new or second hand?

got 2 mates running gas research throttles and havent ever heard of them having a problem

Without the car running check the travel of the throttle. What you are looking for is to make sure that at WOT its not going over centre. So closed the butterfly should be flush with the housing and at WOT the butterfly should be at 90 degrees to the housing, nice and flat say if it goes over 90 degrees to like 95 degrees or more is going "Over centre" and this can cause it to stick and make it difficult for the return spring to pull the butterfly back from going "over centre". From memory GRA throttle bodies have a throttle stop so this may need adjusting but I am unsure, its been I while since I last played with one

One more is to feel how smooth the throttle action is cause maybe the roller bearings on the throttle shaft are worn and are sticking