1985 Spider starts rough and dies

[Snoopy]

The spider is running !
I think it was a ground connection at the intake plenum for the injectors !!!
(Picture from Darsella1).
If i move the left connection the engine is running and the fuelpump is working in a the right way !
But where is the other end (at the gearbox ?) and why is the right cable not working (where should be the other end) ?
I will test tomorrow...

[rlux4]

The ECU responds to input from the sensors and completes the ground circuits as needed. A good ground is needed in the circuit for the injectors to open. So those grounds go back to the dual relay and ECU.
Ron

[Snoopy]

Is under the dashboard near the ECU another groundconnection ? The pictures in my manual are a bad copy...

[rlux4]

Snoopy, I think you're confusing the main ground with the injector grounds. The main engine/body ground is the big one that goes from the bell housing to the car body. Then there are grounds for everything electrical in your car. The electrical components need power and ground to operate. The way the injectors get their signal to pulse is through the ECU, which "makes" the ground side of the circuit that completes that circuit.(There is constant power to the injectors, they just don't pulse until the ground is supplied by the ECU.) I hope this makes sense, writing something is a lot harder than just saying it.
Ron

[Snoopy]

Thank you, i am a IT consultant
Whats happend know: The idle is bad... ohhh old cars..