locochriz1
New member
in higher gears? I have a 99 ford mustang 4.6l manual 5 speed which is hesitating and stumbling when i press on the gas/accelerate in higher gears most of the time. the problem seems to come and go. i replaced my spark plugs and intention coils. please be aware the car uses the coil on plug configuration thus there are no spark plug wires or a distributor. i have tried using the fuel injector cleaner you can buy at any auto store. the ignition coil wire packs are in tack and just fine. i have had problems with cylinder 8 misfiring in the past and i resolved that problem by replacing the coil in cylinder 8 which worked. i replaced the coil again when i replaced my coils and spark plugs. please advise. this problem does remind me of a slight misfire and it occurs most of the time when i try to accelerate especially in higher gears. the car has about 100,000 miles on it.