Rewiring the fuel pump
Senior Member
Joined: Oct 2003
Posts: 3,502
From: Canada
Originally Posted by Dramon_Killer' date='Jan 25 2004, 11:27 PM
I had a link my point was that they make it sound really long and tedious and hard.
I can't understand why it would be a tedious task..
Senior Member
Joined: Apr 2002
Posts: 870
From: NASA/JSC - Clear Lake, TX
Originally Posted by Dramon_Killer' date='Jan 25 2004, 07:47 PM
How do i check voltage?
And Fre, i read a writeup on how to rewire the pump and i remember it being a lot more complicated than just two things.
And Fre, i read a writeup on how to rewire the pump and i remember it being a lot more complicated than just two things.
then, drive your car around, with your multimeter in your lap, reading the voltage.
i got like 7.5V at idle, 8V while cruising, and 10.5 - 11 V at WOT and full boost. should be like 9V at idle and 12.5V at WOT and full boost, but those 2 volts aren't worth it for me to rewire the whole system.
you can also get a bigger fuel pump, then you wont have to worry about too little fuel flow.
Senior Member
Joined: Mar 2002
Posts: 288
Originally Posted by Dramon_Killer' date='Jan 26 2004, 07:27 AM
I had a link my point was that they make it sound really long and tedious and hard.
the DSM rewire is easy and takes about 30 mins...
you could do it the DSM way and just run constant 12v to the pump all the time. then you just run new wire into the back. and use a relay on the stock wire and new wire. but it'll probably end up causing you to run pretty rich at idle and cruise. especialy with a bigger pump
Senior Member
Joined: Nov 2002
Posts: 3,108
Originally Posted by Dramon_Killer' date='Jan 25 2004, 08:47 PM
How do i check voltage?
And Fre, i read a writeup on how to rewire the pump and i remember it being a lot more complicated than just two things.
And Fre, i read a writeup on how to rewire the pump and i remember it being a lot more complicated than just two things.
Senior Member
Joined: May 2002
Posts: 22,465
From: California
Originally Posted by RX7Aggie' date='Jan 26 2004, 08:01 PM
get a multimeter from walmart, run two peices of wiring from your fuel pump harness in the rear hatch area under the carpet, and hook it up to your multimeter.
then, drive your car around, with your multimeter in your lap, reading the voltage.
i got like 7.5V at idle, 8V while cruising, and 10.5 - 11 V at WOT and full boost. should be like 9V at idle and 12.5V at WOT and full boost, but those 2 volts aren't worth it for me to rewire the whole system.
you can also get a bigger fuel pump, then you wont have to worry about too little fuel flow.
then, drive your car around, with your multimeter in your lap, reading the voltage.
i got like 7.5V at idle, 8V while cruising, and 10.5 - 11 V at WOT and full boost. should be like 9V at idle and 12.5V at WOT and full boost, but those 2 volts aren't worth it for me to rewire the whole system.
you can also get a bigger fuel pump, then you wont have to worry about too little fuel flow.
Senior Member
Joined: Dec 2001
Posts: 147
It's not too hard, it took me a few hours to do. The drawing on www.1300cc.com really helped. Just take your time and double check all your wiring as you go and it should be fine. I don't recommend wiring it to see full voltage all the time. It'll make your car run super rich at idle and possibly smoke. And check the voltage before and after.
Senior Member
Joined: May 2002
Posts: 22,465
From: California
Originally Posted by 1971ChevelleSSV8' date='Jan 28 2004, 12:34 PM
What's wrong with the fuel pump anyway that requires you to mess with the wiring?
