Hi,
My MFi really struggles to start when cold, very lumpy like a plug lead is off. If you touch Throttle it will cut out untill its got warm.. Fitted another working Cold Start Injector but still same...
Any ideas what to try next, tested Warm up Regulator with tester and got a reading.. so hopefully thats ok?

 

You need to get the WUR off in order to see if the disc inside is working and moving as it should.

 

cheers mate, i'l have a look at it tomorrow