Resolved 1G No fuel. Bad MPI relay??

[3aG1e_7a1oN]

I proceed to follow this chart: DSMtalk Forums

Fuses, good so I started with the second pin on my MPI relay. Got power, so I'm supposed to suspect a cut wire between the relay and the pump. But I tried to jump the pump with the fuel pump test connector, and used a test light at the actual fuel pump location and got nothing. So what does this mean for me?

If it matters I also went through the rest of the chart and got power to the other wires.
(Result of that is bad MPI relay. But it doesn't make sense that it's the MPI relay if I've tried to jump the pump without using it and have used a test light at the pump sight, when it should be priming but is not.

90 Talon N/T

Also, on the VFAQs, for the fuel pump rewiring it says:

* 30 - feed wire from battery
* 87A - Not used
* 87 - when cutting stock 12V pump wire, this is to the pump
* 86 - when cutting stock 12V pump wire, this is to the car
* 85 - ground

What does it mean 86 goes to the car?

 

[steve]

Also, on the VFAQs, for the fuel pump rewiring it says:

* 30 - feed wire from battery
* 87A - Not used
* 87 - when cutting stock 12V pump wire, this is to the pump
* 86 - when cutting stock 12V pump wire, this is to the car
* 85 - ground

What does it mean 86 goes to the car?

It means that once you cut the old power feed to the fuel pump you have two ends. The end that runs to the fuel pump gets connected to the output of the relay on pin 87 and the end that runs back to the car harness get connected to the coil of the relay to trigger it on pin 86. It supplies 12v when the MPI relay fuel pump side is on, pin 86 runs through the new relay coil and out pin 85 to ground completes the circuit.

 

[3aG1e_7a1oN]

Oh, okay thanks. Update: I'm about to pull the ecu and look for leaking caps.

 

[3aG1e_7a1oN]

Okay, after glancing at the ECU, I decided I didn't know what a leaking cap even looked like. However after taking a closer look, right by one of the caps there is a black mark on the board and on this like white plate thing, looks like a burn. I took a picture of it. So is my ECU bad?

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Sorry if the pictures are bad, crappy camera.

 

[steve]

Not just the caps leaking but the front one shorted and burned up. That's the filter on the incoming power.

Depending on how badly if burned the circuit board it might be better to find a good ECU and send it out to have the caps replaced. I've fixed ones like that but it can get expensive to grind out all the carbon contaminated circuit board, fill the hole, and rebuild the circuit traces.