turbodaily

ive got a fiesta turbo running t25,standard injectors normally running 10psi,however since yesterday its been overboosting running 20psi+...

i took the actuator off and noticed a crack in the diaphram so replaced it,its abit better but i cant get it to run anything less than 15psi and thats lengething the actuator arm by a stupid amount.

any ideas what it can be? ive checked the wastegate flap in the turbo looks ok,ive checked the pipe running to the actuator and thats ok too.

please help!!!!!!

fizzyturbo

did u get another standard actuator, or an uprated one, cus the uprated ones are for higher boosting engines and the lowest boost settings are higher

bud-weis

check the hoses haven't come off the amal valve

turbodaily

i got another uprated one,i noticed that the newer one had more resistence when pulling the arm than the old one so i swapped the springs around and it holds 10psi now

are there different spring ratings for these actuators then?? its a forge t2 actuator.

(ps am not running amal valve)

ive got another little problem now,missfiring when on boost but its like on and off,doent do it all the time so im guessing its a lead breaking down???

cheers lads

adamski frst

if running the ecu not chipped the missing will be frm the overboost kicking in.... or maybe even wrong plugs??? or gaps

xr-stu

does sound like the overboost protetion kicking in dude. best to get it setup mate id say, dont wanna be risking an serious damage....

robfrst

running to much boost for stock injectors and standard e.c.u but check the plugs as well

MATT-FRST

i thought you had to restart the engine to reset the overboost protection?

boostaholic

i had that problem with mine it turned out to be the plugs.i run it on escort cossie plugs agpr12pp with the gap reduced.