problem with power going to 2 of the fuel injectors.

[kalaydjian]

On my 90 se 2 of cylinders fuel injectors has no power, I checked the wires they are in tacted I dont know why there is no power going to the 2 fuel injectors any idea can anyone help. thanks

[kalaydjian]

The injectors that have no power going to them are injector 2 and 3.

[Dr.Hess]

Marcus posted a drawing in this thread:
www.pistonheads.com/gassing/topic.asp?t=224742&f=17&h=0

You will see that 2&3 are wired together. The failure could be anywhere from the ground to the ECM. Trace the wires all the way back to the ECM.

Dr.Hess

[Paula&Marcus]

Dr.Hess said:

Marcus posted a drawing in this thread: www.pistonheads.com/gassing/topic.asp?t=224742&f=17&h=0 You will see that 2&3 are wired together. The failure could be anywhere from the ground to the ECM. Trace the wires all the way back to the ECM. Dr.Hess

Hi Dr. Hess,
Yes you are right, could be the wiring or just the peak-and-hold-jumper that got disconnected.

Could also be the ECM-driver circuit that is shot ...

Marcus

PS: Please notice that the circuit is switched "inverted logic" that means that the injectors always get voltage from the fuel pump (wire 60W) and the whole circuit/injectors are actuated by the ECM-driver that actually puts the "loose end" to ground !!!
When you are saying that your injectors 2&3 donot get voltage, this would mean that there is a fault/cut in the supply wire (60W).



>> Edited by Paula&Marcus on Tuesday 29th November 16:30

[kalaydjian]

I found out what the problem was on my 90 se the reason there was no voltage on the 2 and 3 fuel injector wires the fuel injector it self was bad and shorted the wires on the injectors 2 and 3, had to replace the fuel injector and by the why they are cadillac GM fuel injectors.