 97 cobra misfire
ive got a problem with a misfire , installed a stage 2 procharger p1sc kit 10 psi of boost the car didnt have a miss in it when i installed the kit . drove it to a friend to have him custom tune it. he installed 42lb injectors and a 90 mm mass air. for somereason it has had a slight miss in it since he done the work to it . could it possibly be an injector bad ? or a problem with the mass air, or the tune. everything else has been replaced , plugs gapped at 35 , new wires , coil packs. just dont know what else to try to replace that might cause the car to miss . also the injectors was used but had around 4000 miles on them . could the problem be the injectors since they had been out of a car for a while. anything that anyone can give me a hint on to check ... also i replaced the imrc plates with the deletes. | 
