GT40 no start

[TRIP]

Hola, got an issue that has been developing slowly over the last couple weeks. Started with engine dying after 1.5-2 hours of use. Then took 10-15 minutes before it would start again. Did turn over but did not start until then. Something getting hot, needing to cool down..?
Happened 2 or 3 times, then also died after only a couple minutes of use. Plus getting harder/taking longer before it would start again.

Now, been trying to figure it out for several days, some days it won't start at all. Other days it will start once, run for 15 minutes or so, then die and won't start again. If it runs it runs pretty good. Not perfect, especially when idling you feel/hear rpm's change a little bit, but nothing terrible.
Changed the fuel filter inside the FCC.
Got a spark, and got fuel going into the rails.
Changed ECM with one from another GT40 but didn't change anything.
Spark plugs were pretty grey but seem OK. Going to try to find the right ones though and change 'em out (not as easy as it sounds where I am).

What's driving me mad is that occasionally it does fire up, but 99 out of 100 attempts it does not.

I read about starter solenoids, could it cause this behaviour? Where do I find it and how can you check if it's working OK.
Other recommendations, tips, ideas...?!

Thanks in advance!

[Aaren22]

I have a 2001 SAN that has been starting rough lately and after a lot of searching I figured out that in the top of the Fuel Control Cell where the wires come into for the fuel pump there was a plastic housing that was cracked. So everytime I went to plug the fuel pump onto the connector it would push the terminal clip up through the housing and not make good contact. This must be a common problem because they make a repair kit a nautique parts for $40

[TRIP]

Will check, thanks!

[NautiqueJeff]

Starter solenoid will not cause the engine to stop once it is running, and if that was the problem, the engine wouldn't crank at all.

I had a similar situation with my '99 SNOB. It ended up being a loose connection behind the dash at one of the two main plugs from the dash to the wiring harness. You might disconnect those and reconnect them and see if that makes any difference.

[TRIP]

Turned out to be the distributor that slowly went out, and eventually pretty much died.
Thanks for all your help!

Nice shot of my buddy riding yesterday, for your viewing pleasure

[charlesml3]

The distributor, or just the distributor cap and rotor? Unlikely the entire distributor went bad...

[TRIP]

I had changed cap and rotor recently. It was the sensor inside the distributor it seems. But I don't think you can change just that part, so had to change whole distributor.