Is there anyone out there who could help me please. The problem I am experiencing with a 1995 Jap WRX is that it cuts out the acceleration between 4000 and 5000 rpm. If I suddenly want to take off it will quit accelerating at 3000rpm but if I gradually build the acceleration up slowly it will go to the 4000/5000 rpm and and give up acceleration. I also notice it is running without the turbo kicking in. When travelling at constant speed of roughly 60 / 80mph the accleration will shiver... I am confused... what could it be... Please help :-( For a fuller description of the problem please see the 'drivetrain' section in the technical heading forum of the scoobynet.

 

MAF sensor?

Just a thought I know that is a symptom strongly connected to the MAF sensor failure...........