so when i rev my car or take it out of gear and cost up to a light the revs drop down to like 400 and the car almost dies. cant understand why?? the only thing that is different is the fp intake with perrin filter and E85. car had been tuned but even the tuner can not figure it out. to me it seems like it isnt catching, like it doesnt see the idle point???? really lost and dont get it. have gave the injectors more volts, tried a number of known injector trims, checked for boost leak. still lost any ideas would be great. thanks

 

does it sound like a missfire? check ur plugs man..

 

not really, put new ones in about 2,000 miles ago. i will check them though just to make sure.