Cold start problem - warm start OK!

I'd appreciate advice on the following

1.8K series (1999) - when starting from cold I need to run the starter for around 5-10 seconds before it starts. If restarted immediately after it starts normally. I've changed

- HT Leads
- Distributor & rotor arm
- Fuel, air filter
- Spark plugs

I've also tried removing the fuel filler cap before starting to release any vacuum etc

Presumably no fuel is making as far as the cylinders during this period (although I haven't checked)

Anyone any ideas?

Cheers

i would try pumping the throttle before starting, start by pressing throttle once on the first day or when cold, then 2 pumps then 3 pumps and see what happens.

Thanks for that. I do pump the pedal - it does help but I'd rather get rid of the problem completely if possible