General Rotary Tech Support Use this forum for tech questions not specific to a certain model year
Sponsored by:
Sponsored by: CARiD

Fuel Pump

Thread Tools
 
Search this Thread
 
Old May 2, 2008 | 05:03 PM
  #1  
91' RX-7 Vert's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2008
Posts: 38
Likes: 0
From: Bear Creek, NC
Fuel Pump

ok my ECU is cutting power to my Fuel pump relay, what do I do to trick the Relay to keep powering the Fuel pump?
Reply
Old May 2, 2008 | 10:29 PM
  #2  
backroad-junkie's Avatar
Scotty Doesnt Know
Tenured Member 15 Years
iTrader: (3)
 
Joined: Apr 2006
Posts: 937
Likes: 0
From: wilmington, NC
cant you just wire the fp directly to the ignition or directly from the 12v power source with a toggle switch if desired..might be a stupid idea for reasons im not thinking of right now but its what i would do and id like to hear reasons why not. Dont mean to chase you around the forum but your problem has peaked my interest.
Reply
Old May 2, 2008 | 10:33 PM
  #3  
91' RX-7 Vert's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2008
Posts: 38
Likes: 0
From: Bear Creek, NC
thats what i think im going to do... so i can get to drift practice tomorrow... U know ive posted this question on ImportsNC.com dont ya

do you have Aim, Hotmail, myspace,yahoo? i need some serious help ill be up all night if i have to

Last edited by 91' RX-7 Vert; May 2, 2008 at 10:39 PM.
Reply
Old May 2, 2008 | 10:39 PM
  #4  
backroad-junkie's Avatar
Scotty Doesnt Know
Tenured Member 15 Years
iTrader: (3)
 
Joined: Apr 2006
Posts: 937
Likes: 0
From: wilmington, NC
yeah, but i hate reading back and forth stuff...figured you wouldve gotten down to the current problem and summed it up here to enable my laziness
Reply
Old May 2, 2008 | 10:45 PM
  #5  
91' RX-7 Vert's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2008
Posts: 38
Likes: 0
From: Bear Creek, NC
ok... heres my summed problem, The fuel pump is allways running on 12v unless the car is off right? if so ill just wire it up so i can go Boogidy boogidy boogidy... Its still wanting to crank up run then die

and what wires do what? I got 4 wires back there 2 grounds it looks like, I got 1 pure black thats kinda thick, a black and white that is just as thick, then i got a red and blue striped and a Blue and red striped wires what do these do...
Reply
Old May 3, 2008 | 08:27 AM
  #6  
91' RX-7 Vert's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2008
Posts: 38
Likes: 0
From: Bear Creek, NC
ok... Ive hot wired the Fuel pump and its still losing power... maybe fuel injectors?
Reply
Old May 3, 2008 | 08:56 AM
  #7  
Project84's Avatar
Open up! Search Warrant!
Tenured Member 05 Years
 
Joined: May 2002
Posts: 3,838
Likes: 3
From: Kicking down doors in a neighborhood near you
I'm not sure if your engine is completely stock or not, but if it it then I'm pretty sure the fuel pump does NOT get a constant 12 volts, its changes as the demand for fuel increases. If your car won't stay running, then there is most likely another problem. In the stock system, the AFM has to be plugged in so the ECU will read when the flapper door is opening, else it won't power the fuel pump relay. Like I said, I'm not sure of your setup and there could be a bunch of things causing the problem, but I doubt its a voltage problem.
Reply
Old May 3, 2008 | 10:31 AM
  #8  
91' RX-7 Vert's Avatar
Thread Starter
Junior Member
 
Joined: Feb 2008
Posts: 38
Likes: 0
From: Bear Creek, NC
Well... I think i found out what the problems is... Its still the ECU cause it will cut power to the fuel pump as well the fuel injectors
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
Jul 1, 2023 04:40 PM
Rotospectre
New Member RX-7 Technical
3
Mar 28, 2018 03:33 PM
ChrisRX8PR
Single Turbo RX-7's
21
Oct 18, 2015 04:01 PM




All times are GMT -5. The time now is 11:49 PM.