Hi - My son reported a loss of power driving our Fabia 1.2 BME yesterday - top speed was 40mph. I went to investigate and the car started normally but VCDS-lite shows fault "16686 Cylinder 2 Misfire detected", I took the car for a short drive without any problems.

 

She is on 106k miles and due new spark plugs so I swapped them out. Started the car and the engine was lumpy again as my son had reported, presumably running off 2 cylinders. Reseated the spark plugs but still had a lumpy engine. Swapped out the Ignition Coil on #2 and now the car cranks but will not start. Fitted the original ignition coil on #2 but still the car will crank but not start.

 

I ran a full scan using VCDS-lite and it showed fault "01314 Engine Control Module" but on Address 03: ABS Brakes. Not sure if that is related or red herring.

 

What should i be checking next? I can smell fuel, and i hear what i think is the Fuel pump kicking in on first click of the ignition. 

Edited 12 May, 20215 yr by garibaldy

2 hours ago, garibaldy said:

What should i be checking next?

How fast is it cranking?

Does it sound like it it is trying to start or not?

37 minutes ago, KenONeill said:

How fast is it cranking?

Does it sound like it it is trying to start or not?

This is going to be a subjective response :-) but in my opinion it is cranking well (battery was replaced a couple of months ago) but there isn't any signs of the engine starting.

If I place my foot on the accelerator (not sure what that does these days) there's a hint of it trying to start - but minimal. 

41 minutes ago, garibaldy said:

there isn't any signs of the engine starting.

Which suggests to me that you may have a fuel flow problem or no ignition.

Checked any fuses?

 Ignition coil feed is #52

When you say you 'swapped out' coil 2, do you mean moved it to another cylinder, or fitted a new one there?

22 minutes ago, Wino said:

Checked any fuses?

 Ignition coil feed is #52

When you say you 'swapped out' coil 2, do you mean moved it to another cylinder, or fitted a new one there?

 

I haven't checked any fuses, but will check fuse #52.

Fitted a new coil pack.

Edited 12 May, 20215 yr by garibaldy

18 hours ago, garibaldy said:

 

I haven't checked any fuses, but will check fuse #52.

Fitted a new coil pack.

 

Fuse 52 had blown. Engine now starts and is running smoothly, so just need to see if that fixes the misfire.

 

Thanks Wino!

What would have caused the fuse to blow? 

Maybe a dying coilpack?, a MOSFET transistor inside failing short-circuit, at a guess. 

Someone with a 1.4/16V engine had the same a week or two back. 1.4 BBZ engine stopped and won’t restart - Skoda Fabia Mk I - BRISKODA