05/10/2026
Here’s one of the biggest jobs this year.
I had Joe Nardini message me regarding his Octavia VRS heavily missfiring and running rough.
So I went out to take a look at it and ran a diagnostics.
There was a huge missfire in cylinder 1. I knew the spark plugs and coil packs had previously been replaced but I swapped them both with cylinder 2 to see if the fault moves or stay, and it stayed in cylinder 1. I checked all the wiring to cylinder 1 coil pack and everything was fine.
So decided to re run live data on the injectors and cylinder 1 injector was “open circuit”.
I was given more labour time to strip some parts down to access the injector plug, and the supply voltage to all cylinders was absolutely spot on, so I knew the wiring was fine and cylinder 1 injector was faulty.
I gave a few options:
1: just replace the 1 injector.
2: replace all 4.
3: replace all 4 injectors, replace the intake manifold gasket, clean out intake manifold, replace a fuel pipe as it was braking apart, replacing cylinder 1 injector that goes into the mani ( good safety measures), and a few more bits.
Joe decided to go for option 3, the full works package so he knows everything is hunky Dori.
Safe to say it was 1 long night stripping it down after doing a full day work, then a SUNDAY evening rebuilding it. But she fired up and missfire erased where as before it didn’t. Coolant re bled as had to remove a few houses.
Safe to say Joe Nardini is now a happy chap.