Always difficult to diagnose remotely but firstly what year (’88?), engine v12 or which 6cyl.
Do you get an error code on the computer trip readout?

Robin

I’m more familiar with my 3.6l than the v12’s, hopefully be someone with better expertise than I on V12 problems.

Has it been running ok until recently or is it the first time you have run for a while – i.e. been put away for winter months?

Good news is it starts! If it is relates to engine temp there are a few clues maybe. First is the engine temp sensor (different to temp gauge sensor) which inputs to ECU, giving cold start enrichment. They can go faulty and give incorrect resistance reading – or even the wiring connector gets corroded.
When it dies will it restart immediately or do you have to wait?

Hello Andrew,

Laurence asked me for what my suggestions might be to your issue, which is difficult not having seen the car at all but I’ll give it a go.

From my experience I would suggest you took a look the Ignition Amplifier or the Coil Outputs – faults on these can cause exactly the symptoms you are explaining which occur as the engine warms up, and then disappear again as the engine cools while being stood for 30 minutes.

It shouldn’t be too much bother to swap these for a working ones.

Hope this helps

Steve

Andrew, Have you found the cause yet? Always interested to understand what cures faults for future reference!

Robin

Thanks for the update, most interesting. Always good to know the solution.

I had a failure with my own crank position sensor after long term storage on my 3.6L and it took me ages to find source of problem. At that time I hadn’t realised it even had a sensor..
Costly item on the 3.6 too.
I was never quite sure whether it was the sensor or just the plug to wiring connector corroded but replacement cured the ignition problem.

Robin