Hi, I have a Disco 1 3.9v8 1995, with 145K
I have recently refurbed it (using lots of sagely advice from this site).
Have renewed head gaskets and cleaned up intake and renewed the stepper motor, fuel pressure reg, coil, dizzy cap, rotor arm HT leads. She started as usual on the third turn and as she warmed up, slowly died (as if strangled).
Cannot now get her to fire up at all. I am pretty sure all connections are correct - fuel & water temps etc. I did not move or alter the dizzy at all.
I have a spark, but the plugs get totally wet and it wreeks of fuel.
A garage man told me that the cats break up inside and block the exhaust. So I bought a new cat manifold - still nothing.
I am now running out of ideas......Help anybody?

Excess fuel or not enough air, one of those two.

I'd go back and look at some of the things like the stepper motor, maybe put the old one back on as a substitute.

If all the plugs are wet then something has gone well wrong, especially as the engine fired up OK to start with.

Peter

It is likely to be something you've done as peter says, rather than something else coincidentally breaking.
Could be base idle too low but it should start from cold and die again like the first time.
Beware of fuel getting past rings and contaminating oil.

The item u don't mention in your replacement parts list is the ignition amplifier, u may have a spark but its not big enough to ignite the fuel due to a faulty amplifier, okay while it's cold but failing as the engine warms up.

The remote ignition amps can fail in such a way that the ecu sees a pulse, but insufficient spark from coil.
Make sure that connections on amp are nt corroded (amp held by two bolts) and when renewal that conductive compound used.

Many thanks guys, I'll give it all a go