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ABF'd MK1 tin top cutting out

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Hi all
Not been that active on here for a while as the car has been off the road for a couple of years. However, now its hit 40 I though I'd better sort it out.

Got her insured last Friday and had a little run, so thought I'd take it to work to day. Got about 4 miles...

Just cut out.
At first I though fuel pump as I couldn't hear it. It's usually pretty noisy, but there was just too much background noise.
I also though it could be the 2 yr old fuel in the tank, but when running it was sweet so unlikely to be that.

Then after a 30 min cool down, it started back up. So not fuel pump, or fuel me thinks.
I tried to get home, but I got less than half a mile in traffic so thought I'd sit tight and call AA as I was in a reasonably safe none obstructive place.

AA man thinks ABF ignition module.

I posted up on the Facebook page, and to be expected got a fairly mixed response.

Including some of the following:-
Hall effect sensor
Crank / cam sensor (seems to be a popular choice)
Fuel pump relay
Coil
Coolant temp sensor
ECU relay
WUR (didn't think the ABF had one)
Distributor
Injector seals

As it is an intermittent fault I only know if it is in fault mode if it stops.

I do have VCDS - will it help me? I'll see if it's logged any codes later, but I'm a very infrequent user (read complete novice)

Clearly I don't just want to throw a load of money at it and hope.

So where to start?Any suggestions with links to diagnose?

I quite enjoyed the 4 miles I had, but need to be confident I have found the fault before taking it out again.
Many thanks



 

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OK, so I have discovered that Carista and VCDS are not likely to help me.

I have also discovered I have a spare crank position sensor in my kit, so going to try that first.

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Changed out the CPS (bit awkward, but only took an hour) and left the car running for about 45 mins. It was proper hot (~110C) on dash as it was in the garage, but didn't cut out at all.
Next is to take it for a run, if i'm brave enough.

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Fingers crossed, intermittent faults are always the hardest to solve.

1988 Mk1 Golf GTi Cabriolet 1.8cc DX, K-jet. Daily drive. 317,000 miles and counting
1978 Mk1 Scirocco GLS 1.6cc FR, Webber carb. Weekend toy.

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what fuel system are you running mate ?

Do not know a lot but willing to help if possible

1989 Sapphire Blue Mk1 Cabriolet KR
1985 Atlas Grey Mk2 GTI 2.0 ABF

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Agreed. I'd rather it just break and not run again until the issue is fixed.

Std mk3 fuel injection system and ECU.

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Found some small holes in the coolant circuit in the return pipe from header tank to top of rad. 
Waiting for new pipe then take her for a run. Fingers crossed…

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Taken it for a good run and all seems good. Fingers crossed.

Definitely need to sort the suspension out though. Way too crashy.
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