Engine missing under load manual

 · Could be a ignition module that is cutting out under load. Faulty lifter would rattle in most cases because they are hydraulic, unless the oil pressure is over pumping them causing it to lift the valves off the seats, Most of that would be related to weight of oil in engine.  · Use good quality and correctly gapped plugs. Use Genuine coil packs not cheap ebay or ripco ones. Low compression would not cause a misfire under load it would miss at idle of low. Likely leads or coils or maybe other ignition component maybe the DFI . This condition gets worse under high load, higher speed, or climbing a long hill with higher throttle setting (hotter running conditions). Check valve clearance. "No miss fire is felt at low speeds under 40 mph. Recently I had to replace the head do you think that this may be a valve problem ".

25 HP Kohler Command on a Bob Cat, Pops, back fires, and misses under a load. This happens at all engine temps. It almost seems like a bad valve. We did a compression check and were getting about pounds on each cylinder. The exhaust smells like its running lean. I cant find any. Typically an engine misfire under load, will be a problem with the ignition system, while low engine speed problems will be a vacuum, fuel management or compression issue. When retrieving trouble codes, only consider related codes to a specific misfire problem, like an ignition coil failure code. First, identify the problem you've encountered with your engine, then rule out each potential cause. Remember to follow all safety precautions before starting any work on your engine. If troubles persist after checking the possible causes listed or you are unable to identify the problem, call KOHLER Engines Customer Service at or.

An engine misfire happens when one of the cylinders in your engine fails to them in a vehicle specific repair manual or on the manufacturer's website. With so many systems, it's hard to find the source of a misfire. Consult your car owner's manual or vehicle repair manual for your. -Spark - Check the base ignition timing following the instructions in a shop manual like Haynes. Make sure to disconnect the SPOUT connector. -.