Engine cut out while driving, can't start engine, no fault codes!

[Rob T]

On the way to work today my engine suddenly stalled when I was changing from 2nd to 3rd gear at approx 5500rpm.

While still rolling I managed to get it started again, but immediately it cut out when I tried to put it in gear.

I then pulled over and the car would not start properly. When you turn the key, it catches, but then just cuts out straight away.

My mechanic has seen it, and guesses it may be the air flow sensor, but there are no fault codes, other than an O2 sensor code due to the decats.

I've only had the car for a week, and it's been a nightmare!!

[Keyser]

Nothing else happening? battery OK alarm/remote locks and unlocks the car fine?

 

Check for a good engine earth as well, I had that problem but it would not start at all.

[RobPhoboS]

Cam position sensor or maybe crank position sensor are possibilities. (note - if you do try them, dont use a cheap ebay one!)

[Rob T]

No, other than what I've said, there are no other noticeable problems.

[Gassy]

Hmm sounds to me like either crankshaft sensor or an immobiliser fault however you should see a fault code for crankshaft sensor.Fuel pump?.Can you still hear it prime up?.

[RobPhoboS]

Hmm sounds to me like either crankshaft sensor or an immobiliser fault however you should see a fault code for crankshaft sensor.Fuel pump?.Can you still hear it prime up?.

 

I didn't get an error for the cam sensor - however I knew it was that as I'd just changed it over.

didn't happen again after putting the original one back in.

[Jay84]

It could be something simple like spark plugs going down.

[docwra]

Can you hear the fuel pump priming? AFM issue may not give a fault code so it could be that but it should still start and run on limphome rather than die entirely, my money is on fueling somewhere.

[Rob T]

Spark plugs were replaced in July, so shouldn't be that.

Edited March 21, 2017 by Rob T

[Rob T]

Thanks for the info so far.

I'm getting it recovered to my mechanic's tonight. Hopefully have more info for you tomorrow.

[Rob T]

Fuel pump is priming, so not that either.

Edited March 21, 2017 by Rob T

[davey_83]

Any updates?

[Ebized]

Maybe not in this case but having read many similar threads on here, and when feedback does pop up, the battery/earthing has quite often been reported as the problem.

[Jez @ H-Dev]

As above: Cam/crank sensor most likely - and use genuine. The non-genuines often don't work when brand new.

[Rob T]

Swapping the MAF sensor seems to have solved the problem!

The car is running well now, but I will be keeping a close eye on it.

Many thanks for all the replies 👌