No.1 injector wire testing

Hi guys.

having a problem with my 45 not revving past 4k still. perhaps feels a little down on power too, but its only 100bhp as standard so not expecting a rocket ship.



I've renewed the MAF for a genuine bosch one as the one fitted was no good. I've checked and refitted all boost hoses and theyre all ok I think.



So with the no.1 injector wire - I've had a good look at it and it looks ok. I've unplugged it and the car doesnt appear to run any differently. So should I assume that the injector wire is at fault, possibly broken internally? Can i test it with a multimeter? If so how?



Thanks

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