hi guys, got a ka with a fiesta rst engine fitted running on ofac management, but wont start, i have got spark, and fuel getting up to the rail but no further, just wondered what i shud be getting at the injector multi plugs to switch the injectors on, with ignition off both pins on the multi plugs are earth, igntion on they both turn live, when cranked one pulses live and the other pin stays live, what shud i be getting here? any help wud be greatly appreciated, cheers.

 

This exactly what you should be getting.
The reason both pins have 12 volt with ignition on is the following:
1 pin is the feed, it always has 12 volt on it. The other is switched by the ecu.
To define the signal and minimize noise a pull-up resistor to 12 volt is used.

When 1 pin pulses during cranking fuel is injected.
Try starting with a disconnected catalyst. Will make a lot of noise!

 

Check all the earths for the engine loom, Had exactly the same in my ka when i changed from zvh to zetec turbo and i had missed the earth near the amal valve.

 

ok will do, cheers guys, much appreciated!