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Author Topic: MPI/fuel relay fuel wire  (Read 564 times)

Offline daniel Dee

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MPI/fuel relay fuel wire
« on: April 11, 2014, 11:48:50 pm »
My voltage meter says 12 volts coming from PIN 2 fuel relay (black wire with green line), cranking

the fuel wire at the pump has no power.

What is the route of the wire from the relay to the fuel pump?
What is the color of the fuel pump wire at the tank?


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92 AWD TSI 5spd<br />Built motor ,AEM EMS, Arc2 cdi 1050cc&1000cc Staged injectors Billet S366 T4,top mount manifold.666 AWHP@39psi (RG Dyno 2010). New mods E85, BF cams, 72mm turbo, 70mm throttle body />90 TSI (gone), 95 TSI 5 spd sold, 93 Mazda 5sp(sold), 97 Acura 5spd Vtec 99 Audi A4 quad 5sp 2018 Civicturbo 6sp ktuner

Offline GlenMartin

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Re: MPI/fuel relay fuel wire
« Reply #1 on: April 12, 2014, 12:12:56 am »
Quote from: daniel Dee on April 11, 2014, 11:48:50 pm
My voltage meter says 12 volts coming from PIN 2 fuel relay (black wire with green line), cranking

the fuel wire at the pump has no power.

What is the route of the wire from the relay to the fuel pump?
What is the color of the fuel pump wire at the tank?




hopefully this might help

http://www.plymouthlaser.com/rewire.htm
« Last Edit: April 12, 2014, 12:17:01 am by GlenMartin »
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Offline Brett Haviland

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Re: MPI/fuel relay fuel wire
« Reply #2 on: April 12, 2014, 06:56:13 am »
do u have a re-wire kit installed?  check that.  could be a bad aftermarket relay instead of the mpi relay.


Got the new relay in, and still no power?
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Offline daniel Dee

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Re: MPI/fuel relay fuel wire
« Reply #3 on: April 13, 2014, 10:02:04 pm »
found the problems....
intermittent power to pin 9 (relay) cause by clutch switch....Rather than play with the switch I don't use
I put in a T tap to connect the wires (clutch switch).
The factory plug by the fuel tank has blue corrosion on both ends....Soak it in vinegar , dried,,,die electric grease......Voila!!!

Nothing wrong with the relay but I have a spare now too...

Is there an factory roll over switch that kills the fuel pumps??? I know the FI Mustangs had them.
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92 AWD TSI 5spd<br />Built motor ,AEM EMS, Arc2 cdi 1050cc&1000cc Staged injectors Billet S366 T4,top mount manifold.666 AWHP@39psi (RG Dyno 2010). New mods E85, BF cams, 72mm turbo, 70mm throttle body />90 TSI (gone), 95 TSI 5 spd sold, 93 Mazda 5sp(sold), 97 Acura 5spd Vtec 99 Audi A4 quad 5sp 2018 Civicturbo 6sp ktuner
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