My daughters Monte Carlo 1.2tsi CBZB has developed a misfire/hesitation underload between 1600-1800 rpm. I would say it's normally in 3rd and 4th, but once past that rpm it flies with no other misfires or hesitation. No warning lights have appeared on the dash.

The previous owner has changed the coil pack, and today I replaced the plug leads. Before replacing the leads I plugged in code reader and it showed up that cyl 3 and cyl 4 had been logged. After replacing the leads I took it for a spin and the misfire was still there, plugged in code reader and it only showed up that a cyl 3 had a misfire. As I haven't replaced the plugs and am not sure when they were last changed that's the next job.

I'm hoping someone would be able to shed some light on the issue, if the plugs don't sure the problem what else could be the cause? I've read about the turbo actuators playing up but I'm not sure that would be the cause

Also which brans spark plugs would you guys suggest fitting? And if you could supply part numbers that would be awesome

Reckon your first thing would be to inspect sparkplugs and probably replace. If the gap is too large or are dirty etc you may not be getting a proper spark/combustion at lower revs plus bad plugs can damage coil plugs. As for brands I use NGK on all my vehicles etc. Never had a problem with them. Avoid cheap or unknown makes especially champion. Had a quick google and think the oem is 03F905600A (skodaparts.com)

NGK cross ref came up with this

Not sure if you need a sparkplug boot removal tool on yours. Sons mk1 fabia needs one to avoid damaging leads.

Alasdair

Thanks for the advice Alasdair. I’ve ordered a set of the NGK plugs so hopefully get them swapped over this weekend. I know what you mean about getting the plugs leads off, as I was replacing them I just pulled them off but it looks a right arse of a job now that I need to take care. I’ve seen the use of a zip tie so I’ll give that a go. It was a nightmare just getting the new leads seated on the plugs…. Took it out for a spin this evening and there was only one small misfire so hopefully the new plugs will cure that 🤞