stangstomper68

iTrader: (13)

Ok so just finished rebuilding the motor in my car and runs great except sometimes it will have a miss at idle and has a awkward miss when you have light throttle moving in a parking lot. Wide open is fine, and half throttle is fine. Any thoughts as to what this might be. Only code that it is throwing is a random multiple cylinder missfire PO300

redbird555

iTrader: (14)

plugs, wires, vac leak, coil pack, dirty maf clogged fuel filter etc. I would try cleaning the maf and doing a basic tune up with what I mentioned above. if it still has issues then get a scanner and start looks at fuel trims and sensor read outs