The Top Mitsubishi Galant VR-4 Resource

Join the best E39A 1991-1992 Mitsubishi Galant VR-4 community and document your GVR4 journey.

  • Software Upgraded - Reset Your Password to Login
    In order to log in after the forum software change, you need to reset your password. If you don't have access to the email address you used to register your GVR4.org account, you won't be able to reset your password. In that case, follow the instructions here to regain access to the forum.

Code 0042 Fuel Pump Circuit Malfunction

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Thats what it says in Dsmlink, It will start for 2 seconds, and then die, This is all after a Fuel Pump Rewire and Ecu change. Still the same when the car is changed back to stock wiring. Anyone?
-Shane
 

Tre3zy

Well-known member
Joined
Nov 25, 2008
Messages
602
Location
South San Francisco, CA
you sure you wired it rite? did you read the link i gave you? maybe the first time you tried rewiring it you mixed up the wires and the pump probly failed...
 

Chim55117

Well-known member
Joined
May 7, 2007
Messages
429
Location
Little Canada, Minnesota, United States
This sounds dumb, but have you correctly compensated for your injectors in DSMLink? When I installed my 880's, I forgot that I had previously selected 650's, and the car would start for several seconds and then die.
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Quoting Tre3zy:
you sure you wired it rite? did you read the link i gave you? maybe the first time you tried rewiring it you mixed up the wires and the pump probly failed...



Link is set right, and yes I hooked it up right, I put it back to stock wiring and it as well sets off the code, -___-. I read on link forum that it means that the Ecu Pin 13 doesnt see 12v's going to the pump it will shut down. The ecu is good according to Bernard (ecu rebuilder) by looking at it, I will have to get a multimeter tomorrow.
-Shane
 

dsmless

Well-known member
Joined
Jun 12, 2008
Messages
224
Location
tucson,az
Dude I had the same problem with 96, even tho the ecu was repaired the fuel pump circuit runs were the caps like to leak so it's a chance that the acid ate that circuit too, just run a wire from your fuse tray by the obd port to pin 13 so that it will see 12 v andnot turn off the pump it will also clear the CEL easiest fix, search my username and there's a post on this
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
what wire did you run from the fuse tray? Thanks a bunch though, much appreciated, and yes the ecu was repaired before.
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
mpi fuse? yea still a complete fuse, I dont see why it would be any fuses since the car is starting, it just doesnt stay on after the code is thrown,I will run a wire to pin 13 but I need to know which wire should I run?
-Shane
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
By looking at this diagram, instead of Wiring a wire from the Fuse Tray constant 12v, Can't I just wire from pin 103 to pin 13? Pinout
 

Jostar

Well-known member
Joined
Dec 25, 2004
Messages
724
Location
Chicago,il
I had the same Problem before in a DSM, It was the Fuel relay box under the radio next to the ecu (dsm)I believe its near the ECu in the galant...
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Ive tried two different mpi relays....
 

Olson

Well-known member
Joined
Oct 7, 2006
Messages
1,237
Location
Moreno Valley CA
I had the same thing when i did my criuse elimination. Check and make sure the injector resister pack is still there or pluged in.
 

Olson

Well-known member
Joined
Oct 7, 2006
Messages
1,237
Location
Moreno Valley CA
Also its gheto and stupid to do it this way but you can if your careful. Pull your fuel rail put your injectors in there so there tight get a spare CAS or pull your cas ( witch will jack up your timing) and spin the CAS. When you spin the CAS the ecu will till the injectors to fire. If you dont get anything there you might have a bad pack .. from there i dont know
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Pics of injector packs? And i have fuel the plus are wet before
 

stevep

Well-known member
Joined
Oct 23, 2004
Messages
416
Location
St. Charles, IL USA
Quoting brunoboy:
I read on link forum that it means that the Ecu Pin 13 doesnt see 12v's going to the pump it will shut down. The ecu is good according to Bernard (ecu rebuilder) by looking at it, I will have to get a multimeter tomorrow.
-Shane



I know I didn't say that and checking the link forums Dave didn't quite say that either. The ECU will throw the code but it doesn't then turn the pump off as far as I can remember. Maybe they changed the code in DSMLink but the stock code doesn't.

I don't know how anybody can tell by looking if the trace for 56 or 13 is open since it sits under the heatsink.
 
Last edited:

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Spliced pin 13 to a switch to mpi relay pin or the constant 12v dnt. Remember which one but it works.
 

dsmless

Well-known member
Joined
Jun 12, 2008
Messages
224
Location
tucson,az
That's what I was trying to say, the ecu needs to see a constant 12v so it can keep the pump energized, any 12 v source would of worked I said the fuse tray because you can just use a spade conector and use any open fuse slot that wayyou can also splice a on off switch as a " poormans antitheft" either way it will work also the CEL should of came off well luckman
 

Brunoboy

Well-known member
Joined
Apr 25, 2008
Messages
2,880
Location
San Bruno,CA Home of SFO
Yea i just used taps, and the cel did go off, thanks a bunch.
-shane
 
Support Vendors who Support the GVR-4 Community
Boosted Fabrication ECM Tuning ExtremePSI Fuel Injector Clinic Jacks Transmissions JNZ Tuning Kiggly Racing Morrison Fabrications RixRacing RockAuto RTM Racing STM Tuned

Recent Forum Posts

Top