florotory

Can someone please help me locate the circuit opening relay? I think I am getting to frustrated on trying to get this thing running i can read the diagrams anymore. . I need to check it due to my fuel pump not turning on when the key is on. If i use the jumper terminal it works (car still wont start). So Im hoping my problem lies there. Im sure Im not that lucky though. Thanks

satch

iTrader: (1)

The fuel system is not designed to turn on w/key to on unless the jumper wire is in place or the flapper door of the AFM is opened enough. The relay is just under the dash and to the right of the steering column and the relay and plug are Yellow and Black. The Blue wire should have voltage when the key is put to start and also when the car is running and also when the jumper is in place along w/the key to on.

florotory

awsome. I didnt know that about the pump. Hopefully this will fix my problem. If not ill be at a loss.

dwb87

iTrader: (22)

Did you fix your problem? I have to use the jumper to start my car. I have rewired my fuel pump, though... So, is this circuit opening relay even necessary for me to have??

I just keep finding fuel pump rewire diagrams for TII's. Mine is a TII swap with an N/A chassis and wiring... So, I do not have the fuel pump resistor relay.

dwb87

iTrader: (22)

So, all of the rewire posts I have read... The N/A doesn't really need to be rewired.

Why do I have to jumper that damn circuit opening relay for my car to run?

dwb87

iTrader: (22)

Ah!... I have found PLENTY of old threads about this. (Pele had an informative one.) - I am going to test the circuit opening relay.

satch

iTrader: (1)

Which wires do you have to jumper?

dwb87

iTrader: (22)

The thin black and thin brown wires on the circuit opening relay. (Terminals E1 and Fc, I believe.)

According to the FSM: E1 = Ground; Fc = To fuel pump switch

satch

iTrader: (1)

It's either because the AFM fuel switch has gone bad or the Brown wire that runs from the AFM to the Circuit Opening relay is poor or the Black ground wire that is the ground source for the Brown wire at the AFM is poor.

dwb87

iTrader: (22)

Thing is... I don't run an AFM with my Power FC.

satch

iTrader: (1)

Then the Brown wire which originally comes from the AFM needs to get a ground from somewhere with the car running for the fuel pump to run properly.

dwb87

iTrader: (22)

So, I need to somehow wire a ground wire to the brown wire that only grounds when the engine is running...?

satch

iTrader: (1)

Correct.

dwb87

iTrader: (22)

And this can probably be done with a relay?

satch

iTrader: (1)

The fuel switch in the AFM is not really a relay in the true sense of the word as it manually closes/opens w/the movement of the AFM vane. A relay would be based off of the voltage as determined by either the ignition switch, fuses powered by the BTN fuse (constant power) or the Battery itself.

EDIT: I suppose what you could do is to keep the AFM but only for the purpose of providing the temporary ground to the Brown wire at the Circuit Opening relay thus the only necessary wires connected to the AFM would be the two wires found at the fuel check connector (Black wire and the Brown wire).

dwb87

iTrader: (22)

Ugh... There's got to be a better way. I'll figure something out.

satch

iTrader: (1)

Since you're not the only Power Fc'd car out there you would think that others have not resorted to the jumper technique to run their cars so maybe that crowd could point you in the right direction. The need for the jumper really has only one drawback and that would be in case of an accident where the engine turns off, but electrical power is still supplied, is that the fuel pump would still be on.

dwb87

iTrader: (22)

Yeah. The fuel pump runs when the key is turned to "ON"... I will see what others have done.