Jim Galbally

an odd one for you guys...
i can be on part throttle making boost (ie 20% throttle, 10psi) then all of a sudden the boost will drop off to 0 (and i can hear a hoise from the engine bay at the same time)

i assume this is NOT normal?

i'm guessing the dumpvalve might be faulty (std recirc) and opening causing the boost to be lost?

this fault is 100% repeatable and always happens when accelerating steadily at part throttle, its a bit annoying as it means i have to apply more throttle to get the boost back and i just want to keep a static rate of acceleration

ECU Monitor Enthusiast

iTrader: (1)

Faulty TPS making ECU back off boost ?

Jim Galbally

nope, gotta be mechanical. boost is 6psi with boost controller off and just on actuator pressure. plus ECU not that inteligent.
its only today i realised it made a noise when it did this, so im thinking thats the noise of the DV opening

JTECH James

iTrader: (13)

yeah, sounds dump valve related to me, blank it and try it, as an elimination process

Jim Galbally

can't blank it as it's kinda screwed into the plenum not on a hose

just wanted a sanity check before i go buy a new one

JTECH James

iTrader: (13)

cant you drive along with you finger in the hole?