escort gti turbo boost problems
Hi, I own a 1998 escort gti, with turbo conversion, the mapping kit is megasquirt, and mapped on v-power fuel! the car has been running fine on boost, until this evening! i have just filled up with "supreme unleaded" could this be causing my issues which include..........
mapped to no boost, then at 4000rpm the turbo kicks in, but when this now happens, it holds back, like its fuel cutting, and backfires, although it sounds cool, it doesnt drive cool! could this be because of the mix, and diffeent fuel now used? should i run it just on v-power?
many thanks