Sumodoggy

It’s while driving

Bump and update. Still getting judders but also noticed that on a long steady motorway run , there were times when I wasn’t getting any judders but mpg on dashboard display was showing 95mpg+ (if only) and seemed underpowered (might have been imaging). Also had a few occasions that engine, from standstill, has petered out needing manual restart. Now has stage 1 remap with egr delete. All seemed very well but now having repeats. Up until yesterday I had no dash lights (and no obd errors) but after a cutout and juddering pretty much every assistance system and glow plug symbols flashed up. Stoped and restarted but had a couple of stop/start errors showing. Could the issues be something to do with stop/start? I have noticed that when it is acting up, the stop/start doesn’t seem to activate when I’d expect it to and the we tickover is at around 1000rpm not the normal 800rpm. Any thoughts?

I posted a couple of weeks ago about an occasional judder my Superb has developed. It’s a 2.0l diesel auto. Getting occasional juddering / loss of power while driving. Comes and goes. No warning lights or other symptoms. Had to call out a mobile mechanic as I was away. He reckoned it was a lose oil filler cap, I’d topped the oil up and hadn’t clicked it shut. This was allowing air into the system and confusing the engine management. Clicked it back up and mainly ok but now getting the issue back. It’s been serviced in the meantime (non Skoda dealer) and no obd errors showing. I did notice yesterday when on cruise control on the motorway it was showing 90+ average mpg (which it obviously wasn’t doing). Any ideas?

Yes but after the oil top up and not screwing the cap in properly

Thanks for the info and the offer. I’m in Birmingham!

I’ve a 2 litre diesel Superb Estate. 4 year old, 55k with full service history. Never missed a beat. Started occasional juddering (short power loss). No real pattern to it. No dash warning lights. I was away from home last week on hols and only mechanic I could get out couldn’t see any errors on his tablet plugged into the car. I’d topped the oil up a week or so before and he reckoned I hadn’t clicked the filler cap or dip stick airtight and that was sucking air in and confusing the engine management. Sounded feasible to me and the car has run fine up until this evening when the judder is back (still no warning lights). Only thing I’ve done differently is to top up with premium diesel and add some Wynns diesel ‘cleaner’ to the fuel. Any ideas?