Mk4 Turbo running EDS Phase 3.
Car has started to have issues when on idle. This is intermittent, but regular enough that it happens everytime i drive the car.
When ticking over on idle, it appears to have moments where it struggles to maintain rpm, in that the revs drop and it stalls, or it picks itself back up. The same happens when approaching junctions. I put the clutch in and the car almost/does stall.
My first area to check was all of the air hoses, and nothing appears to have split/come lose.
My only thought is the dumpvalve, which is a Collins. Boost gauge reads the desired boost, and the dumpvalve makes the necessary noise!
Coilpack changed recently for a new one.
Any comments/advice appreciated.