Can a vacuum leak cause a misfire in cylinder 5?
Can a vacuum leak cause a misfire in cylinder 5? Generally no. A vacuum leak generally affects an entire bank if cylinders or both. Most often a vacuum leak will trigger code p0174/0171 (too lean) or even p0175/p0172(too rich). Single cylinder misfires are usually caused by ignition issues (spark plugs or ignition coil or wires) or fuel injectors. Can bad spark plugs cause vacuum leak? This may be due to a vacuum leak, but it can also be caused by a weak or inoperative accelerator pump in a carburetor, dirty injectors, or even ignition problems such as a cracked coil,...