Hi, I have own my Mk1 for about 13 years now, but about 8 years ago I fitted a 1.8 lump from a GTI Convertible, I believe to be 1992 year.
The most obvious difference was it was not oil air cooled and seemed to have a slightly different set up on the manifold, by this I mean we blanked off a inlet that we didnt have a pipe to go to..... Please bear with me as this was years ago and I have not really used the car for the last 6 years or so.
Anyhow since the moment we first cranked over the engine it never did fire from cold.
I have changed all the obvious things i.e cold start, injectors, 5th injector even new filler neck and tank incase of fuel contamination.
Its just that over the years I have put up with this, as all is needed is to start it 3-5 times and eventually it warms enough to drive, but it must be something simple to fix as it started when the engine was 1st installed.
I have always wanted to take the car to say TSR and get them to check it over but never wanted to drive it that far, as its not my 1st car anymore, and hasnt been for years.
So is there anyone nr heathrow/Sunbury that would like to have a look and see if they can sort out my old faithfull....... I would be prepared to pay the winning fixer

Cheers
Darren