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Topic
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car: 2003 Ford Falcon BA “VCT” ( australian make) 170Kms on the odo.
story: few days back i almost floored the accelerator pedal just needed to overtake a car. however car was running good after that. next morning misfire started. checked all the coil one by one, checked injectors one by one. replaced plugs with old used ones. got no code. no vacuum leak i sprayed wd40 all over the place can think of. cant find the problem. misfiring when idling misfiring on drive, misfire even worse when going uphill. please share ur ideas.
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The symptom of acting up more under a load has me leaning more towards an ignition related issue such as a coil. If you do not have access to a scanner with live data you could try this… Brake torque the engine in gear to put it under a load. Be careful not to overheat it. See if you can find an rpm that will cause the misfire to remain more constant. Perhaps it will throw a code your way. The PCM should detect the misfire after a predetermined/programmed number of occurrences. Other thoughts…check for carbon tracking on the spark plugs coming from coils… Check your fuel pressure as previously suggested…do a spray bottle test in the dark to look for any leaking sparks…
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