1989 Ford F-150 Repair Question
Topics covered: Engine, Ignition timing, Intake manifold.
Mileage: 50,000 miles.
Mileage: 50,000 miles.
Asked on February 17, 2011
1989 Ford F-150 engine pings / knocks up hills
1989 Ford F-150 mileage: 50,000. My engine knocks/pings on hills and during acceleration, but only when the engine is warmed up. Switched to 89 octane from 87 but it did not help. Engine has new plugs. Any ideas?
Asked by 2CarPros-ArchivesAnswer
Replied on February 17, 2011
Check ignition timing and the knock sensor; it may be failing. It is located behind the intake manifold in the block