i'm new to the scooby seen my car is a 96 plate impreza turbo uk car and it was running great but it has now developed an annoying fault...

it runs perfectly till its up to running temp then it splutters at next to no throttle (30mph in top gear or 1000 to 1500rpm any gear) and feels like its got a huge flat spot if i try to accelerate, and it won't idle properly almost stalls then picks up and continues the cycle until i pull away or it does stall....

any help would be greatfully recieved, thanks guys

 

sussed it, seems my scooby was none to impressed with having a bailey's dump valve fitted to it....

put the standard 1 back on and all is well again

so what the best/loudest option on dump valves for scoobies then?