My car has been misfiring for the last few days, i took it into a garage, their diagnostic results showed a miss fire on cylinder 3, they thought it just needed a good service, so i had the spark plugs and all filters changed but the problem continued. After some forum reading i can see there is a common fault with the coil packs on the FSI engine, so i thought i might try replacing it

 

I was just wondering how easy they are to replace? with the information that cylinder 3 is miss firing, logic tells me that it would be coil pack 3 that needs to be replaced, if this is true how do i know which one that is? are they numbered from left to right?

 

Or should i just replace all 4?

 

thanks

Edited 27 July, 201411 yr by larn

Swap 3 & 1 & see if the misfire moves.

 

I'd do all 4 if it isn't going to cause excessive wallet pain

As Brad says it, swap them and go for a drive, then read the ECU and see is the one you swapped is misfiring still, then you have located a bad coil.

 

 

Its not hard to change, just careful when you unplug coils from the plastic top bar, as they have a small tooth to keep them in place and you might break it. Then a little force to twist and pull up.

 

Good luck.

I loop a cable tie around the front & back (cord or string would work as well) and pull them out with that