1999 Saab 9-3 repair Question No Voltage at the Fuel Injecto

Hi
Injectors power from ignition discharge module on valve cover green/red wire. Ground is provided by computer.
Hope this helps
Thanks for donate

I think the ECU controls the injection on a Saab?

That's what I said ground controled by ECU ie. computer. Power come from module

Ignition Module works
I dont have ground from ECU

Check green/red wire coming out of Ign Dis Module it supplies power to injectors. If you have power and no ground then ECU is possibly faulty.
I'm confused your post started no power know no ground. Let me know

Green/red wire is OK
Sorry for the confusion, but that's the details I needed.
I have all grounds missing from the ECU
I will replace the ECU
I let you know

Good luck and yes let me know

I forgot to ask!
Voltage from green /red wire is pulsing
Is this correct?

Are you checking at injector terminal? if yes then ECU must be grounding the pulses indicate injector on/off. Can you feel or hear injector click? Can you get a noid light hook up will tell if ECU is firing injector

Car is running again.
Bad ECU
Bad Ignition Cassette (Orange Sparks)
Bad fuel pump
All at the same time!

Thanks for your help!

Hp

I have never seen so much stuff go out at once. No wonder you where having such a time diagnosing.
Glad it is running. Thanks for letting me know

i did not see where you did a fuel pressure test ,to find out if fuel pump is working or not ,plus check relays located under the d/s dash panel ,just below where dice unit is located ,saab ecm do not go that easy ,& saab system is all about power to grounds so do not mess with it if u do not understand it ,check basic system first ,do not get all technical ,saab's are expensive to repair if u blow the ecm module .