Hey there scotty, need some help with my 2010 Honda CRV with the R20A engine it has almost 100000KMs. I recently swapped my ignition coils for new ones. The plugs were fine and less than a year old so just cleaned them as i usually do. However there seems to be this recurring problem of car vibration/shudder when the ac is on and the car even hesitates to accelerate in that state. I once had this issue and i had to replace the alternator which improved it for a while but it has come back and is worse. When the ac is off the car has power. The AC compressor is a used one i got from a scrap yard. It still blows cold. But i cant help but wonder if the AC is the culprit kindly assist
The AC compressor is a used one i got from a scrap yard.
That could be your problem right there. It may be wearing out internally and requiring more power than normal to operate.
However I would load test your battery and alternator, or at least check voltage at the battery when the compressor engages, to see if it's an electrical problem.
