I've done searches for the exact location of the injectors but cannot find a diagram.

Am I right in thinking they are very close to the throttle plate cover, set down with two wires running to each? If so, someone has crimped rubbish terminals to the front four which are quite loose and the revs alter if they are moved! I've re-crimped the ones that seemed worst, will have to wait for the engine to cool a bit before the others.

I think new connectors might be in order.

my connections were all corroded,

 

so i tried making new spade terminals to each (yes you are correct, there are 2 wires from the loom which go to each injector, one + and one - )

 

that didnt work, they need to be spot on really.

 

new connections, 7.50 each, much better.

 

bit potchy getting them seated correctly, especially the 2 at the back. but nice when all done :)

 

 

get a volt meter, and test the amps at the connections after you have fitted to the injector. they should be 10-15a.

 

youl find with home made crappy connections, only about 0.3a will get through