Fuel injector pin out
09-05-13, 09:15 PM
#1
Fuel injector pin out
Can someone give me a pin out diagram to the fuel injectors from the factory ECU?
I need to check the continuity from the factory ECU to the injectors.
This is for a `94 touring edition BTW.
I need to check the continuity from the factory ECU to the injectors.
This is for a `94 touring edition BTW.
Last edited by Speeder165; 09-05-13 at 09:36 PM. Reason: edited for year and model
09-06-13, 08:41 AM
#2
RX-7 Bad Ass
iTrader: (55)
It's all the shop manual's wiring diagram. Also, the section covering the fuel injection systems has some nice diagrams showing which pins on the ECU are which.
Each injector has 1 wire that's always 12v (it's a common wire) and 1 wire that goes back to the ECU to the injector drivers. The ECU pulses that wire to ground to make the injector fire.
Unless your harness is REALLY damaged, the wires are probably OK. The connector could be broken and not making good contact. If so, hit up the junkyard - I found a '90s Protege that uses the same injector connectors, snipped off all 4 of them for a $1.
Or, your problem lies elsewhere
.
Dale
Each injector has 1 wire that's always 12v (it's a common wire) and 1 wire that goes back to the ECU to the injector drivers. The ECU pulses that wire to ground to make the injector fire.
Unless your harness is REALLY damaged, the wires are probably OK. The connector could be broken and not making good contact. If so, hit up the junkyard - I found a '90s Protege that uses the same injector connectors, snipped off all 4 of them for a $1.
Or, your problem lies elsewhere
.Dale
09-06-13, 08:09 PM
#3
It's all the shop manual's wiring diagram. Also, the section covering the fuel injection systems has some nice diagrams showing which pins on the ECU are which.
Each injector has 1 wire that's always 12v (it's a common wire) and 1 wire that goes back to the ECU to the injector drivers. The ECU pulses that wire to ground to make the injector fire.
Unless your harness is REALLY damaged, the wires are probably OK. The connector could be broken and not making good contact. If so, hit up the junkyard - I found a '90s Protege that uses the same injector connectors, snipped off all 4 of them for a $1.
Or, your problem lies elsewhere.
Dale
Each injector has 1 wire that's always 12v (it's a common wire) and 1 wire that goes back to the ECU to the injector drivers. The ECU pulses that wire to ground to make the injector fire.
Unless your harness is REALLY damaged, the wires are probably OK. The connector could be broken and not making good contact. If so, hit up the junkyard - I found a '90s Protege that uses the same injector connectors, snipped off all 4 of them for a $1.
Or, your problem lies elsewhere
.Dale
I had an idea the injectors were pulsed to ground to activate them.
Will turn the key over to "run" and see if I get all 4 injectors showing 12V at the ECU injector pins. Have a FSM and will do some digging this weekend for that diagram. Probably should have dug deeper into it before posting but was looking for the fast and quick method of info.
I suspect that I am missing battery voltage on 2.
If not, Oh boy......
Thanks also for a source where I can get replacement injector connectors.
Seems like off of the top of my head, I came across replacement connectors from a seller on the web sometime back. Whether they still sell them or not, I don`t know. If not, your info is invaluable at this point if that is my problem.
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