just wiring my erst engine into my mk2 fiesta the fuel is getting to the metering unit but only going to the cold start valve ive tried running the pump holding down the flap and cracking one of the pipes off but get nothing when you turn it over it almost starts but then backfires and stops ( might just be ignition timing) but its just the cold start valve whi8ch is giving it the petrol. its got a spark. could this to be due to the sensors on the inlet and below there are 5 of them but i only know 2 for sure
green- to knock sensor
brown- to brown sensor in middle of inlet below cold start
blue-?
black?
yellow-?
the 3 sensors are the
the cold start valve
the one right under the manifold
and the one next to the inlet on the water pipes
any hinput would be great cant wait to get it running thanks