Engine cutting out? To run or not to run....
Discussion
Further to Magpies disappointment on Saturday, I thought I'd move my reply here to make it easier to search for in future. ( Mods please allow me time to delete my post on the Nov 1st thread. )
Are you absolutely certain it's a fuelling issue, and not electrical/ ignition LT ?
I had a very similar intermittent problem which started last year just before our Blyton track day in October last year, and it continued every so often right up to a couple of days before Spa this year. The trouble with intermittent faults is you never know when you've nailed it.
Austin has behaved himself since 19th May ( touch wood! )
I think I had a combination of faults, firstly the fuel pump relay socket base was not making a good contact with the relay, causing it to overheat and start melting. I always carry a spare relay just in case.
Next issue was an intermittent short on the supply to the 12v cig lighter socket which kept blowing the 10amp fuse. The cig lighter is fed from one of the light green cables that supply many things, including handbrake w/light, indicators, instruments and alternator w/l ( which is also part of the alternator excitation supply ). If this fuse blows, the engine will fire on turning the key, but will not sustain on releasing the key.
I ripped out the cig lighter and wiring after the plug and fitted a new socket wired direct to a constant live feed via an inline fuse.
I also replaced the fuel pump, main feed hoses, fuel filter, and cleaned out the accumulator in case these items were causing too high a load on the fuel pump circuit.
Next I found my cold start relay ( green, in the void between the passenger footwell and the inner wing ) had a lot of water in it. Probably not helping, but you may not have this since your cossie install. It's a good idea to make sure all your engine loom plugs and connections are clean, dry & healthy.
Finally, just before setting off for Spa, my alternator packed in ( rectifier diode failure ) so I fitted a new full alternator. Could that have been the root cause?
Anyway, since then, Austin has not missed a beat.
Hope my saga goes some way to helping you and others. There's nothing adds more spice to a journey than never knowing if you're going to make it!
Luckily, I always made it to my destination after a bit of determined fiddling about, never had to get towed or recovered. Luck or skill? 
We may never know! 
One further thought, is the wiring to/from your rev counter part of your ignition trigger circuit? Just wondering......
Forgive me if I've been preaching too much about sucking eggs!
Good luck mate.
Glen
magpies said:
I'm jealous as been having fuelling issues - so went for a short run on Saturday to check that the new fuel pump and filter (and expensive injector overhaul/test) had cured the problem however only managed 3 miles and then it stopped and although starts then dies so back to drawing board - only the regulator and tank to go..... I did check the tank when I had the body off and it had been clean. So home being towed behind a Range Rover and no Sunday run to Whitby 
Hi Mick, however only managed 3 miles and then it stopped and although starts then dies so back to drawing board - only the regulator and tank to go..... I did check the tank when I had the body off and it had been clean. So home being towed behind a Range Rover and no Sunday run to Whitby Are you absolutely certain it's a fuelling issue, and not electrical/ ignition LT ?
I had a very similar intermittent problem which started last year just before our Blyton track day in October last year, and it continued every so often right up to a couple of days before Spa this year. The trouble with intermittent faults is you never know when you've nailed it.
Austin has behaved himself since 19th May ( touch wood! )
I think I had a combination of faults, firstly the fuel pump relay socket base was not making a good contact with the relay, causing it to overheat and start melting. I always carry a spare relay just in case.
Next issue was an intermittent short on the supply to the 12v cig lighter socket which kept blowing the 10amp fuse. The cig lighter is fed from one of the light green cables that supply many things, including handbrake w/light, indicators, instruments and alternator w/l ( which is also part of the alternator excitation supply ). If this fuse blows, the engine will fire on turning the key, but will not sustain on releasing the key.
I ripped out the cig lighter and wiring after the plug and fitted a new socket wired direct to a constant live feed via an inline fuse.
I also replaced the fuel pump, main feed hoses, fuel filter, and cleaned out the accumulator in case these items were causing too high a load on the fuel pump circuit.
Next I found my cold start relay ( green, in the void between the passenger footwell and the inner wing ) had a lot of water in it. Probably not helping, but you may not have this since your cossie install. It's a good idea to make sure all your engine loom plugs and connections are clean, dry & healthy.
Finally, just before setting off for Spa, my alternator packed in ( rectifier diode failure ) so I fitted a new full alternator. Could that have been the root cause?
Anyway, since then, Austin has not missed a beat.
Hope my saga goes some way to helping you and others. There's nothing adds more spice to a journey than never knowing if you're going to make it!
Luckily, I always made it to my destination after a bit of determined fiddling about, never had to get towed or recovered. Luck or skill? We may never know! One further thought, is the wiring to/from your rev counter part of your ignition trigger circuit? Just wondering......
Forgive me if I've been preaching too much about sucking eggs!
Good luck mate.
Glen
Not from a TVR but friend had all sorts of intermittant running issues. We were convinced it was a fueling issue, starvation under load spluttering, only running on full throttle, or failing to start at all. Even foxed the AA man he called when stranded in deepest darkest Devon. Surprisingly a change of the rotor arm , in desperation has up until now (2 weeks) solved all the problems. Just added incase it helps.
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