How many people, if anyone, is doing this?

[turbobird14]

So ive been tinkering around with my GST lately and replaced the battery tie down and tray when i saw the fuel pump testing connector. It got me thinking, for people who have had a problem with the MPI Relay/ Fuel pump issues: Has anyone ran a 12V Switch to it to put constant power to it instead of just while cranking? Just curious.

 

[bryanwheat]

Which mpi relay fuel pump issue are you referring to? I can say that literally no one is doing what you are talking about. Most people who have a problem with their mpi relay or wiring fix the problem.

 

[turbobird14]

^ Yes i knew this was coming. Im not having any MPI Issues, was just a wandering thought. Back when I was in high school my first car had a problem with the cooling fans not coming on when they were supposed to. Couldn't track down the reason why (86 Dodge Aries !) so we wired a switch to turn them on and off. I dont know why but kit kinda made me think if anyone is doing this.

 

[bryanwheat]

Well first off there is never a situation where a wiring problem is not diagnosable. There are people out there will just wire up a switch, but it is always fixable.

 

[EVO9_Inside]

On srt4s we run alternator to pump, with a relay. so your not talking nonsense.
but thats for preformance, not being lazy about diagnosis.

 

[turbobird14]

Well first off there is never a situation where a wiring problem is not diagnosable. There are people out there will just wire up a switch, but it is always fixable.

I was 17, and it would cost more to trace down a wiring problem than what the car was worth, so in this situation I don't see it being unreasonable.

 

[pauleyman]

That connector just powers the stock relay. Its good for diagnosing fuel delivery or the circuit and its good to pump fuel out of your tank into a bucket. Thats about it.

 

[92AWDHX40]

yes wiring can be a pita and expensive thing to trouble shoot, just about anything is fixable for a price.

 

[b00sted]

I would wire in my own aftermarket continuous duty relay, and then use a toggle switch or the ECM output wire to turn that relay on and off. I'd advise against a toggle by itself unless it's rated for the continuous amperage a fuel pump draws.

On racecars, I just use an aftermarket switch panel for everything. Ignition/Computer, fuel pumps, water pumps, etc...But I'm usually not working with a factory harness in the car either.

 

[bryanwheat]

yes wiring can be a pita and expensive thing to trouble shoot, just about anything is fixable for a price.

A 5 dollar multimeter from harbor freight is as cheap as it gets. You can test anything wiring related with one.

 

[92AWDHX40]

Did you figure it out.

 

[turbobird14]

I have a multimeter....used it a few times :/. When I was 17 I didn't even know how to change a headlight let alone trace down a wiring problem....fast forward to know and I'm pretty sure I know what I'm doing. So anyway to sum this up....it was just a thought, no I didn't have a problem, let's just leave it at that

Did you figure it out.

Blinker fluid was low

 

[DogWhistle]

Seems it would be useful to prime the fuel system following engine work, since the fuel pump only kicks on while cranking.