Testing Injector plugs

[RichValver]

Can anyone help me out and tell me how to test injector plugs?

I have a multimeter but cant seem to get a reading from them.

I Have error code P0300/multiple missfire but it only seems to be at certain revs

Changed 3 different injectors now and changed coilpack so suspecting the wiring or atleast want to rule it out

thanks in advance

 

[bloke]

Perm 12v with ignition and pulsed earth on cranking.

Decent code reader will tell you what cylinder is the issue.

 

[RichValver]

Perm 12v with ignition and pulsed earth on cranking.

Sorry to be dumb but this isnt making much sense to me, can you talk me through what i need to do?

Thanks in advance

 

[Raymond_11]

Set it to ohms and put it onto the plug on injector and I'm sure they should be like 16 ohms

 

[RichValver]

Yeah I know how to test the actual inject but I was looking to test the actual wiring. It seems its an injector at fault anyway

Thanks for the input though

 

[HarvB]

Because they're pulse-width modulated you'll struggle to pick them up on a cheapy multimeter. Best you could do would be to continuity trace the plug back to the ECU.

 

[da rok]

I use one of them testers with a light in it to see the pulse...