Notices
Tech / Misc Tech topics that don't seem to go elsewhere.

91 civic hatch fuel pump/wiring problems

Old 10-28-2013, 12:11 PM
  #1  
Honda-Tech Member
Thread Starter
 
KYLEEFinG's Avatar
 
Join Date: Oct 2013
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default 91 civic hatch fuel pump/wiring problems

Have a 91 civic hatch dx with a d16z6 swap running a chipped p28 when I turn the key to on position "II" the main relay clicks like its priming the fuel well it doesn't stop the fuel pump just keeps pumping gas. Please help trying to get this figured out ASAP thanks
Old 10-28-2013, 01:10 PM
  #2  
Honda-Tech Member
Thread Starter
 
KYLEEFinG's Avatar
 
Join Date: Oct 2013
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Bump
Old 10-28-2013, 02:09 PM
  #3  
Honda-Tech Member
Thread Starter
 
KYLEEFinG's Avatar
 
Join Date: Oct 2013
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Bump really need to figure this out ASAP I've replaced main relay and problem still occurs...
Old 10-28-2013, 04:05 PM
  #4  
Honda-Tech Member
 
Jjbaehr's Avatar
 
Join Date: Aug 2013
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Default

Pretty sure the Ecu grounds the main relay for 2 seconds at start up, it's probably the Ecu or the wire for it is shorted to ground
Old 10-28-2013, 04:39 PM
  #5  
Honda-Tech Member
Thread Starter
 
KYLEEFinG's Avatar
 
Join Date: Oct 2013
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Okay man I'll give it a shot 1st thing tomorrow I'll let you know if it works or not
Old 10-31-2013, 05:42 PM
  #6  
Honda-Tech Member
Thread Starter
 
KYLEEFinG's Avatar
 
Join Date: Oct 2013
Posts: 8
Likes: 0
Received 0 Likes on 0 Posts
Default

Bump, changed ecu and looked around for open or loose wires didn't see anything anyone know what wires trace over to main relay to control fuel pump priming??? Thanks guys
Old 11-01-2013, 04:01 PM
  #7  
Honda-Tech Member
 
Jjbaehr's Avatar
 
Join Date: Aug 2013
Posts: 270
Likes: 0
Received 0 Likes on 0 Posts
Default

Green/black wire is the wire that grounds the relay from the Ecu, the yellow/black sends power to the fuel pump. If the green/black wire is shorted to a ground it will cause the relay to keep sending power to the pump. If the yellow/black wire is shorted to power it will also cause the pump to run. The yellow/black wire also runs to the main fuel injector, and aux injector. FYI
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
cdmed6si
Honda CRX / EF Civic (1988 - 1991)
8
04-09-2013 08:08 PM
civic89si666
Honda Civic / Del Sol (1992 - 2000)
20
12-21-2009 10:25 PM
tegdude227
Tech / Misc
2
01-31-2009 03:59 PM
clinicmotorsports
Tech / Misc
4
02-15-2007 08:42 AM
0817crx
Honda CRX / EF Civic (1988 - 1991)
3
09-18-2005 08:00 AM


Thread Tools
Search this Thread
Quick Reply: 91 civic hatch fuel pump/wiring problems



All times are GMT -8. The time now is 03:51 AM.