Cutting out immediately after start up

Cutting out immediately after start up

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DAKOTAstorm

Original Poster:

419 posts

156 months

Sunday 22nd February 2015
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Ran the Tuscan to the shops, 20 min run down the motorway, everything ran fine. Upon returning to the car it started up fine, ran lumpy, I was able to move about 25 yards, then it cut out. When trying to re start, ignition comes on, fuel pump primes, engine starts and turns over then immediately cuts out. Same when throttle open. Fuel is in tank and battery fine. There are no fault codes. The speedometer has not been working, don't know if that could be related just giving all evidence. It's a mk2.

Any ideas? I am currently still in car park awaiting tow truck but thought someone may know the fault and how to correct it.

Tuscanuwe

323 posts

194 months

Sunday 22nd February 2015
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Pls check revolution sensor at flywheel for debris and function and if sensor cable is seperated from ignition cables.
After starting up there is a small limited time to give the rev signal to the Ecu. If this signal is not coming, the engine cuts off without red lamp!

Uwe

Milky400

1,960 posts

177 months

Sunday 22nd February 2015
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Has it been sat for a while? Mine was doing this lay week before the rad went, but cleared after 5 mins or so. Car had been sat for a couple of months

DAKOTAstorm

Original Poster:

419 posts

156 months

Monday 23rd February 2015
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Miraculously after sitting for an hour in the car park waiting for tow truck, out of boredom I gave it another go and she started up and off I went.

It had been sat for two days, in the rain, which it doesn't like at all, but driven to the shops where I was stuck. Hopefully she will start up this weekend and I can give it a long drive home and fix the speedo problem and fit new battery.

Milky400

1,960 posts

177 months

Monday 23rd February 2015
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Could it be moisture getting into the spark plug cover? Is it sealed?

330p4

668 posts

229 months

Monday 23rd February 2015
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Scott I had av similar problem at Le Mans the immobiliser was dropping the fuel pump circuit so no fuel pressure
Ian

DAKOTAstorm

Original Poster:

419 posts

156 months

Monday 23rd February 2015
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I do not know about the spark plug cover I will have a look this weekend, but then it was starting up and firing. If the spark plugs were at fault I'd have no spark to kick it in to life?

The fuel pump was priming, usually when I have a fault with the immobiliser it shuts off fuel circuit and it won't prime.

I did originally think water had gotten in somewhere and the hour I had sat and previous engine temp was enough to dry it off, but then why would it start originally to drive to the shops. Has me baffled.

Cockey

1,384 posts

227 months

Wednesday 25th February 2015
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When my car failed to start when hot (I had stopped the engine for about 5 mins), it turned out to be a failed coolant temp sensor. The dash pod water temp reading was fine, but the ECU uses a separate sensor which can only be viewed through the ECU software. I think the failed sensor was causing the car to mix the air/fuel incorrectly based on an incorrect engine temp.

Once the engine had cooled a bit, it stared fine. New sensor sorted it (about £20 delivered).