Mini Cooper S Engine With Serious Misfire Problem
This client brought their Mini Cooper S to GP Motor Works with a serious misfire. The engine felt “out of balance” and also very uneven when accelerating. They requested we conduct computer diagnostic testing to isolate the reason for the misfire.
We traced the fault to cylinder number 1. We then conducted a compression test which showed a zero reading on the cylinder. We expect to see a reading of approximately 9bar so clearly there was a serious problem. When the cylinder head was removed we immediately noticed there was a hole burnt through the piston. The reason this happens is because of carbon buildup in the cylinders which precipitates a detonation which causes a burn. This leads to a hole in the cylinder and hence the loss of pressure.
Unfortunately, this requires the engine to be rebuilt.
We presented the options available to our client which were to rebuild the engine or to fit a second hand engine at 70% of the cost. They requested we source and fit a second hand engine.
Common Causes of Engine Misfires
There are several reasons why an engine may begin to misfire or a rough idle:
- There may be a vacuum leak
- An issue with the spark plugs
- A problem with the ignition coil.
Get in touch with us the minute you notice your Mini Cooper starts to misfire. Early detection can prevent costly repairs!