So been having a problem with my 207 1.6 thp 150 on a 2008 for last 6 month now with misfiring. First time it happened it said cylinder 1 and 3 misfiring so changed all 4 coils which sorted it for a couple of month then it come back with same codes so changed the sparks as coils looked fine and was only 2 month old. It’s now happened again with codes for cylinder 2 and 4 misfire. I had the walnut blast done on intake valves on Saturday as I thought maybe that was the problem but obviously not! So I’m kind of stuck what to try now as i can’t just keep replacing plugs and coils as their not cheap so any suggestions would be appreciated. I have read maybe some kind of back pressure from catalytic converters if blocked/faulty may cause this? I have attached picture of vault codes that were taken tonight. Anti pollution fault come up on way to work and was still on at my break 4 hours later but on way home which was another 4 hours after the light went off but codes were still stored as i code read it when I got home.
4.8 KB Views: 193