Im having trouble with my `89 RS Turbo!!

Its difficult to start n when it does eventually fire up it refuses to idle properly!! Its sparking fine n it is fuelling when the metering flap is pushed down.

Iv disconnected the cold start which made no difference, iv disconnected the multiplug on the side of the metering head which again made no difference!! Iv changed the pump, accumalator, ECU and Pink fuel pump relay. Iv checked the fuse for the heated seats n its ok. Im now running out of patience n cash!!

Has any1 got any idea of what else it could be or shall i just change the metering head as this is the only thing i havnt changed??

Any help appreciated!! Thanks