The V8 Owners Forum -

I have live to both terminals in the injector plug wiring on hotwire setup this cant be right ?

Are you saying +12v to both injector terminals on all 8no injectors? If so, remove main ECU connector and all injector terminals, then check for shorts within wiring loom. Also work checking resistance across each injector. See these sites for more good tech ref' info'

http://www.g33.co.uk/fuel_injection.htm

http://www.britishv8.org/Articles/Rover-14CUX-EFI.htm

If your only unplugging one inj plug for diagnostics etc from that bank then this is normal the +12v circuit it making its ways through the over 3 connected inj's via their internal winding's this is why your seeing +12v on both pins, try unplugging the other 3 then see its batch injection dont forget 2 rows of 4 ..... banks left and right

One side will have 12v from the cars wiring.

With the ecu connected and powered up, when the injector is off, most ecu's will apply 12v to the trigger wire.

No potential difference, no injector opening.

To trigger the injector it will ground the output.

So it isnt unusual to see 12v on both wires with almost every ecu I've worked on

Thanks guys I bought Noid light to day all sockets pulsing but still got misfire.
New Dizzy coil leads plugs voltages correct on tps and afm . worse when hot and seems to be down on 6 cyls. going to check injectors next Oh new fuel pump too. getting to point of fitting carb grrr