problem with 2nd turbo on boast??

[evolutioncheng]

took the car out for a drive today and the car started playing up. Then problem is when the 2nd turbo comes on boost, the car jolts violently!! At 3.5 to 5000 revs any idea what mite cause this? We checked the odd pipes but can’t see anything obvious.  The car has a apexi ecu and gready boast controller mapped and fiited by pipe, I rung pipe and cause he cant see the car suggested that a pipe mite be lose. Help lol o when It happan the boast controller was flashing dnt know if that makes any different?

[Jono FD3]

Sounds like the boost controller is at fault!! check the power connections as if it is loosing power then coming back on that would mean it is intermitantly controlling te boost resulting in boost spikes & jolty ride under power!

Jono

[evolutioncheng]

mate ur spot on it was my GREDDY PROFEC B BOOST CONTROLLER. which is rather strange cause they aint known to break. so need to purchase a new one now. cheers to wgt tho cause i would never found that lol