Morning all.

Issues with - Octavia VRS TSI 2013 63 estate.

I was pulling out of a junction, got up to 20mph, changing 1st to 2nd. Passing through neutral the engine cut out. No bang/clunk/clatter/odd noises.

Stopped the car and tried to restart the engine. The engine turns over and just doesn’t fire.

The AA came and couldn’t find an issue. There’s fuel pressure, not the timing (is it a chain or belt…? I’m not sure 🤔)

So I needed recovery to a garage. The only location within the recovery miles allowed (free bank recovery) was a Seat/Cupra dealer. They do work on Skoda so agreed to look.

They’ve replaced the battery as this was dead when they got to look at the car, there’s compression across the 4 cylinders, they’re thinking it could be an ECU issue.

Has anyone had anything similar?

Cheers Mark

33 minutes ago, mabl287 said:

they’re thinking it could be an ECU issue.

Seems highly unlikely that an ECU would suddenly fail, far more likely to be a sensor or wiring if nothing mechanical or fuel related.

Could be the crank sensor, something similar happend to the Mrs on an old mercedes she had

I hope the dealer did a scan on the car...even with an offline version of ODIS. It's sounding a bit like guess work up to now.

This is the current state of play…

“So far I have,

Read the fault memory which is showing no faults

Checked the low pressure fuel supply

Checked the fuel for any signs of mis fuelling

Read live data from crank and cam sensors

Scoped the signals from both cam sensors

Removed the coil packs and spark plugs.

Compression check of all 4 cylinders

Found no spark, so tested lives and earths to coil packs, this also included checking fuse's and relays to engine control unit.  Fuse boards located behind glove box, so that needed removing 

Next steps would be to access engine control unit which is security bolted in, so isn't a quick job, then test wiring and signals to the coil packs, test of high pressure fuel system, scope crankshaft sensor (not easy to get to). Then we are potentially into a situation where parts nee to be replaced in an elimination process.”

Next I think I’m breaking it for parts…

140,000 miles not worth more than £4k…

Surely a fault is present. Maybe need a more sophisticated code reader to get it.

I can't imagine its a complex issue if it suddenly happened while driving at low speed and you have compression still.

The no spark suggests wiring or plug undone somewhere.

I'd say if you can get a decent electronic diagnosis it will show the fault. Eg get a live feed of engine parameters while cranking.

Maybe crank angle sensor is simply failed or wire broken or unplugged.

Or, engine immobiliser has somehow kicked in

Hooray!

Fault found. It’s a corroded connection in a plug 🤦‍♂️

So now it’s getting fixed!