Hi,

 

Driving home the engine died on me, from about 30mph and 2500 rpm it gradually died, no juddering, no ominous sounds.

 

I got it pushed back home. Now it won’t restart. 
 

Have looked at the following

- VCDS, no codes thrown

- Fuel gauge says 3/4 full but added some anyway.

- EGR valve removed and sprayed with cleaner and refitted.

- Fuel rail valve spits a tiny amount of fuel out when you press it.

- Spark plugs look to be getting fuel to them

- We disconnected one fuel injector and got a code, as expected

- Don’t think it’s a coil pack as I had one of those go before and the car ran rough and would start albeit roughly. Now it won’t start at all.

- Pulled one spark plug out, reconnected coil pack, and earthed it, tried starting. No spark seen.

 

Ideas welcome.

 

 

and 

 

 

Replaced that coil pack, didn’t make a difference.

Check the timing belts are intact.

Thanks. They seem to be, from opening the upper cover (second video link).

32 minutes ago, jonmad said:

Thanks. They seem to be, from opening the upper cover (second video link).

 

Wow, I didn't even watch the video, I'm not really a 'visual' person because I can use words.

 

I wonder if the throttle body has packed up.

Throttle valve looks like it opens and closes ok. (Also did a VCDS test of that before doing a test of the EGR valve while it was out.)

 

Also tried a different ECU.

Edited 25 April, 20215 yr by jonmad

Immobiliser LED on the door going off when you try and start it?

Checked any fuses? 52 feeds the ignition coils.

Ah. We checked 17 and 56.

 

52 was kaput. I swapped it with 50 (RH dipped beam). It blew when I turned the ignition on (I heard it go click).

Short to ground somewhere between fuse and last coil then, I guess? Or one of the coils shorting internally.  Disco all but one, try another fuse, then keep adding them in one at a time if that one doesn't re-blow the fuse?

Thanks Wino, that’s a great help. I’ll order some fuses then see how I get on.

On 25/04/2021 at 18:35, Wino said:

Short to ground somewhere between fuse and last coil then, I guess? Or one of the coils shorting internally.  Disco all but one, try another fuse, then keep adding them in one at a time if that one doesn't re-blow the fuse?

Perfect! One of the coils blew the fuse. Replaced it with a spare and all good. Thanks so much for suggesting that fuse. We’d checked a couple of others based on another post somewhere, but didn’t go down the list looking for other likely fuses to check.

Great news.  To be honest, your description of the fault and what you'd tried already went a long way to pinpointing the likely problem area.