[urq] still poor starting

[SpotatAshleys]

I still have a bad starting problem.
The symptoms are as follows: 
Sometimes the car will start first time with virtually no turn over of the engine and no foot on throttle pedal.
However if it does not catch first time it will not then start on that go.
I have to stop and turn it over again with my foot flat to the floor and after a few seconds of continuous cranking it will fire.
It always fires up and has not let me down but this long cranking is a pain.
I use the car every day. The most it lies idle is over night but if I don't use it for a few days the next time i use it it fires first turn of the key.
I have noticed that if I switch off when hot and then fire it up again a few minutes later it fires straight away but the air fuel meter shows an extremely rich mixture. I would not have expected this on a hot start.
Car has solid lifters (WR engine) and the gaps are all generally 0.05mm wider that spec. I have checked the various fuel pressures and they appear to be in limits, I have fitted a new starter and new injectors, fuel filter and plugs, leads and distributor cap and rotor. 
Will it be a thermotime switch problem or CSV?
Why is it imtermittent?
Any ideas would be most welcome.

Thanks

Keith

'87 WR