I was on my way out in the car and pulled out to overtake a Ford Galaxy people carrier and bam! No power! I was just about pulling alongside but barely accelerating. So I pulled out of that maneuver rather quickly and sheepishly dropped back to stop and try and find the problem. I opened the bonnet and nothing seemed amiss but the car was running very badly on what sounded like 3 cylinders.
So I set about the usual culprits, spark or fuelling. I changed the spark plugs for a brand new set but to no avail. So next I bought a second hand coilpack from the MLR forum. I fitted this and the engine fired into life running sweet as a nut again.
Often in this situation, I set about changing the cheapest item first. If you experience similar symptoms the following are usually the culprits in order of the cheapest up to the most expensive:
- Spark plugs
- Bad fuel
- Coil pack
- Wiring fault
- Fuel pump
- Timing out
- Coolant leak into cylinder often meaning Head gasket failure
Hope this helps!