Tryn to bring my car back to stock an have to have 25 post to sell the parts so i thought i mise well fix any issues and this is the first.when i start the car the revs hang at 1 and jumps over and over again to 2 slowly.I did have a ollllld fuel filter i just changed tht caused sum lights(misfire) for about 5 minutes on the way back from the shop and shutterd a bit but once i changed filter it fixd all of tht,nw just the idle jumping.