Skoda Octavia vrs 2.0tfsi petrol 2006 74k

 

I bought this car from a elderly lady it was her husbands who passed , she told me it was an intermittent starting problem, she had broke down serval times with it she done a lot of short journeys but she managed to go down to patworth hospital twice without a problem at the beginning of the year , she told me it backfired recently. When the car doesn’t start or dies at a junction it doesn’t start again , until the faults are cleared , she also said she didn’t have a problem with the car since Skoda done a major service June 18 , She took it to Skoda in Great Yarmouth and they said it may be the electrics/ecu the lady then took it to a garage and had the ecu tested and no faults where found only water damage around/near the ecu garage had it 2weeks and no faults found . 

 

I bought the car started it and it ran very rough and as I pulled out of a junction it stalled on me and wouldn’t start , had a bloke come out with us diagnostic machine and found 13 fault codes and failure of all modules cleared then and I was able to drive home smoothly (1.5miles) and put the car on the drive and left it till next day , I went back to it show my dad started it and let it run for abit then revved it , it died and won’t start again and got in contact with mark green a auto technician he can out and got it working and it ran for about 20minutes where he said he thinks it the one of the flaps under the manifold is broken . (I wasn’t really happy about that ) I got a friend round he said it can’t be that as the car would still start and the fact is all the flaps are on a bar also if it was then why wen you clear the faults it starts again :/ next day I looked at the old paperwork and noticed it had a intermittent starting problem in 2013 and a relay 644 was replaced so I thought I’d do that , I installed the relay and it started 1st time and 2nd 3rd and so on , I let it run for 20minutes ran rough at 1st bout smoothed out , thought I’d fixed it .. also put it on a cheap Diagnostic machine o faults where found .. left it next day went to take off the drive , it didn’t start, cranking fine like every other time got a couple of fault code reset it still didn’t start went and got the battery tested battery was 100% that night I had to push the car to my drive as I now had the space , next day I had a quick look at it , reset the 2faults and it started I actually drove it round the block but was too worried taken it further , next day didn’t start . Spark plugs looked ok and a coil packs. What’s you opinion guys 

If I were you, I'd get the ECU checked again as there is nothing to say it was checked properly or is still undamaged.

 

Assuming it's good, start inspecting/verifying the wiring against the official WD. Continuity is not enough, you need to load test the wires using suitable tools. Even more so as there are reports of water damage around the ECU connector, it's certainly possible that the water has wicked down the wires causing corrosion.

 

You might also want to add what the 2 error codes were you cleared...

 

You should also post a full VCDS autoscan and confirm the ECU has been updated to the latest software version.

 

These are the fault codes hand written which I had when the bloke done it .. I changed the relay 644 and done the  diagnostic again (using a cheap one) and 2 fault codes remained p0688 p2149 

thank you

Do you think it’s anything else, like a relay ? When it drives it drives ok (rare occasions)