ok so a mate brings me an A4, says its down on power, says he wants me to change the turbo, so i swap the GT15 for a GT17 as thats all i had knocking about, anyway the problem is still there, infact he says its much worse, its realy slow to rev, like it takes about 5 seconds to reach the red line wen reving in neutral, any ideas? i thort it cud be a boost leek but surly it wud still rev? cud be a colapsed cat but it runs the same with no down pipe, is there a sensor or vacuum pump that could cause this? why would it be worse with a GT17 i thort it would be better?
im out of answers, dont know much about the controls around the AFN, if anyone can help would be greatly appreciated