I have a 1986 isuzu pickup it is a 2.3L 4cyl 5 speed 4x4, whenever it is given higher gas it tends to knock quite loudly, timing belt is fine and all fluids seem to be up where they should be
It doesnt knock while idling it starts to loudly knock upon giving it more gas..oil is fine, all fluids are fine, timing belt is new, not only does it knock, but wants to die when slowing to a stop.
Cars & Trucks - Isuzu - Pickup - 1986 Isuzu Pickup
Answers & Comments
The knock is most likely detonation or spontaneous combustion
it comes from incorrect air / fuel ratio, incorrect ignition timing,
incorrect rpm for the throttle setting
It is detrimental to the engine as the increased combustion temperatures will melt piston tops if allowed to persist unfixed
start by running the fault codes to find the problem area
( most likely a heated oxygen sensor (HO2S) in the exhaust manifold not reporting correctly to the ECM which controls the injector settings