hi
i have a greddy t78 single with greddy external wastegate
i get up to 2 bar boost in 2nd gear, some days ago it worked fine with 0,95-1,2 bar
my apexy boost controler is fine, i checked the solenoid with 12 volts, its working, i also cheked the solenoid cable with a 12 volt light...began to shine when i reached 0,8 bar.
i unpluged both vacuum lines from the solenoid to let the wastegate work against the spring alone, still 1,3 bar in the first gear and 2 bar in the 2nd.
someone told me the wastegate stucks.
so what can i do?? and what can i do to avoid this in the future? i bought this turbo kit used but checked all the parts, the wastegate seems to be fine when i put it in...