Going back to EFI, question about fuel pump. .

FC Zach · 03-31-2015, 12:52 AM

So after having my car set-up for carburetion since 2005 I had decided it was time for something new and that I wanted to go back to fuel injection, I'll be running the engine via a Sprint RE/Ludwig harness so no OE harness is present (was pulled years ago). I have reversed a lot of things I had done to the car in the past like pulling out wiring I made for the ignition, fan, fuel pump and what not. .

I'm trying to keep things simple and want the fuel pump to run off the original wiring (i had it hard wired to an open spot in the fuse block). I have reversed the hard wiring and reattached the pump wire (the blue one with yellowish stripe) back to the harness by the fuse box.

My question is, will I need to do anything else to the harness under the dash (there isn't one in the engine bay) to supply power to the pump? I believe there is a relay by the steering column for the fuel pump, not positive though. Terrible pic but this is what I saw in my manual, I think it says "fuel injection circuit opening relay"

Also, is this something I will have to have?

If those things are necessary I may just hard wire the pump again, any suggestions?

Thanks in advance, Zach

***TitaniumTT*** · 03-31-2015, 01:09 AM

You should hard wire the pump anyway.... I would run some good 14ga wire from the battery ( both hot and grnd) to a relay and use the trigger of the haltech to trigger the relay to power the pump.... Which fuel pump are you using?
That dohickey you posted the pic of looks like the fuel pump relay resistor.... Varies pump speed and useless shit like that

FC Zach · 03-31-2015, 01:32 AM

Thanks Brian! Yeah I think I'll just run some new wire to and from a relay because after seeing the resistor assy. from my searching I started to change my mind on trying to utilize the OE wiring.

I'm running an OE pump, not sure what series it is if there is even a difference. I got it from My5ababy a few years ago.

***TitaniumTT*** · 03-31-2015, 02:04 AM

Cheers Zack! Yeah, no need to utilize all the stock wiring when it's not necessary.... I remember I put a haltech in a bone stock TII and what I did was use parts of the stock harness and wired the haltech trigger to the factory connector by the blower motor, eliminated the resistor but jumped the wires, hooked up a toggle switch to the relay under the dash to make it a cutoff switch and just ran some marine duplex back to a new relay. Used what was once the stock fuel pump power wire to activate the new relay and bam! Consistent fuel pressure

FerociousP · 03-31-2015, 08:45 AM

Quote:

Originally Posted by TitaniumTT

You should hard wire the pump anyway.... I would run some good 14ga wire from the battery ( both hot and grnd) to a relay and use the trigger of the haltech to trigger the relay to power the pump.... Which fuel pump are you using?
That dohickey you posted the pic of looks like the fuel pump relay resistor.... Varies pump speed and useless shit like that

^this. fresh wire from a triggered relay (probably in your ludwig harness already).

FC Zach · 03-31-2015, 08:57 AM

^ True, I emailed Chris to see. My guess is that you're right Paul.

infernosg · 03-31-2015, 10:14 AM

If Chris builds yours any way like he did mine you'll have a dedicated output for fuel pump power. So glad I had him make the harness!

FC Zach · 03-31-2015, 10:35 AM

Sweet, Thanks!

FC Zach · 03-31-2015, 12:54 PM

Just got the answer I needed to hear, the fuse box will have wiring for the pump!

03-31-2015, 12:52 AM	#1
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Going back to EFI, question about fuel pump. . So after having my car set-up for carburetion since 2005 I had decided it was time for something new and that I wanted to go back to fuel injection, I'll be running the engine via a Sprint RE/Ludwig harness so no OE harness is present (was pulled years ago). I have reversed a lot of things I had done to the car in the past like pulling out wiring I made for the ignition, fan, fuel pump and what not. . I'm trying to keep things simple and want the fuel pump to run off the original wiring (i had it hard wired to an open spot in the fuse block). I have reversed the hard wiring and reattached the pump wire (the blue one with yellowish stripe) back to the harness by the fuse box. My question is, will I need to do anything else to the harness under the dash (there isn't one in the engine bay) to supply power to the pump? I believe there is a relay by the steering column for the fuel pump, not positive though. Terrible pic but this is what I saw in my manual, I think it says "fuel injection circuit opening relay" Also, is this something I will have to have? If those things are necessary I may just hard wire the pump again, any suggestions? Thanks in advance, Zach __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-31-2015, 01:09 AM	#2
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	You should hard wire the pump anyway.... I would run some good 14ga wire from the battery ( both hot and grnd) to a relay and use the trigger of the haltech to trigger the relay to power the pump.... Which fuel pump are you using? That dohickey you posted the pic of looks like the fuel pump relay resistor.... Varies pump speed and useless shit like that __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

03-31-2015, 01:32 AM	#3
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Thanks Brian! Yeah I think I'll just run some new wire to and from a relay because after seeing the resistor assy. from my searching I started to change my mind on trying to utilize the OE wiring. I'm running an OE pump, not sure what series it is if there is even a difference. I got it from My5ababy a few years ago. __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-31-2015, 02:04 AM	#4
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son iTrader: (4) Posts: 4,581 Rep Power: 10	Cheers Zack! Yeah, no need to utilize all the stock wiring when it's not necessary.... I remember I put a haltech in a bone stock TII and what I did was use parts of the stock harness and wired the haltech trigger to the factory connector by the blower motor, eliminated the resistor but jumped the wires, hooked up a toggle switch to the relay under the dash to make it a cutoff switch and just ran some marine duplex back to a new relay. Used what was once the stock fuel pump power wire to activate the new relay and bam! Consistent fuel pressure __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

03-31-2015, 08:57 AM	#6
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	^ True, I emailed Chris to see. My guess is that you're right Paul. __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-31-2015, 10:14 AM	#7
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA iTrader: (5) Posts: 811 Rep Power: 15	If Chris builds yours any way like he did mine you'll have a dedicated output for fuel pump power. So glad I had him make the harness! __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS

03-31-2015, 10:35 AM	#8
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Sweet, Thanks! __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4

03-31-2015, 12:54 PM	#9
FC Zach RCC Loves Me Not You Join Date: Mar 2008 Location: Eagleville, TN iTrader: (2) Posts: 2,267 Rep Power: 19	Just got the answer I needed to hear, the fuse box will have wiring for the pump! __________________ 1993 Yamaha GTS1000 1992 Celica Turbo AllTrac 1987 RX7 Sport 1979 Yamaha G1, KM24 powered 1975 Dolmar KMS4