AVI_8
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This is fixed but I thought I’d share in case it helps anyone else in the future.
My car had been off the road for the winter and has sat in the garage for this time, whilst servicing it I changed the spark plugs, on starting it up the engine was misfiring badly with fault codes for 3 cylinders, they were Iridium plugs and on checking the gap they were 0.75mm, factory spec is apparently 0.70 so I used the correct tool to bring the gap down to that, I was very careful doing this but thought I must have damaged them so stripped off a whole load of parts to get back into them again and re-fitted the old ones, misfire still there but not on the same cylinders, diagnostics showed that multiple injectors had been shut down also.
Then followed a whole day of diagnostics, swapping everything about, tested every wire going to the plugs and injectors, all seemed to be fine, even ordered an oscilloscope in order to check for signal.
Then last night thought I’d go out and pull the plug for the MAF sensor to see what would happen starting the car in what I’d presume to be in a basic closed loop scenario.
Would you believe it ran perfectly, let it run for 10 minutes then plugged the MAF back in with the engine running and now runs as it should, cleared the codes and no further issues.
This is a new one on me as to why this happened but if it helps anyone else!!
My car had been off the road for the winter and has sat in the garage for this time, whilst servicing it I changed the spark plugs, on starting it up the engine was misfiring badly with fault codes for 3 cylinders, they were Iridium plugs and on checking the gap they were 0.75mm, factory spec is apparently 0.70 so I used the correct tool to bring the gap down to that, I was very careful doing this but thought I must have damaged them so stripped off a whole load of parts to get back into them again and re-fitted the old ones, misfire still there but not on the same cylinders, diagnostics showed that multiple injectors had been shut down also.
Then followed a whole day of diagnostics, swapping everything about, tested every wire going to the plugs and injectors, all seemed to be fine, even ordered an oscilloscope in order to check for signal.
Then last night thought I’d go out and pull the plug for the MAF sensor to see what would happen starting the car in what I’d presume to be in a basic closed loop scenario.
Would you believe it ran perfectly, let it run for 10 minutes then plugged the MAF back in with the engine running and now runs as it should, cleared the codes and no further issues.
This is a new one on me as to why this happened but if it helps anyone else!!
