EFI Problems

mustanginwork · 03-14-2005, 06:28 AM

ok i have an 83 stang. converting over to EFI and new style dash. I have an 89 dash with a 88 EFI harness. The problem i am having is the fuel pump comes on when you turn the key switch off and not on. Im wondering if the harness is the same from a 88 and 89. Also im getting no power to anything except the dash stuff when the key is on. If anyone can add some help to this.....

Thanks Chris

Capri306 · 03-14-2005, 10:32 AM

This belongs in the Windsor Power Forum.

LX5liter · 03-15-2005, 12:59 PM

Are you going with speed density or mass airflow? Unless the harness is from a California car it will be a speed density unit.

Jeff Chambers · 03-15-2005, 01:05 PM

You need to get two things, a pin out for the year computer you're using and a wiring diagram for the year of harness/dash you are using. There are changes from year to year that will affect the overall wiring.

mustanginwork · 03-17-2005, 12:05 AM

well i fixed the problem it was the injecters all 8 were bad, thanks for the info

03-14-2005, 06:28 AM	#1
mustanginwork Registered Member Join Date: Mar 2005 Posts: 2	EFI Poblems ok i have an 83 stang. converting over to EFI and new style dash. I have an 89 dash with a 88 EFI harness. The problem i am having is the fuel pump comes on when you turn the key switch off and not on. Im wondering if the harness is the same from a 88 and 89. Also im getting no power to anything except the dash stuff when the key is on. If anyone can add some help to this..... Thanks Chris

03-14-2005, 10:32 AM	#2
Capri306 Moderator Join Date: Sep 1998 Location: Grand Rapids, Michigan, USA Posts: 1,001	Re: EFI Poblems This belongs in the Windsor Power Forum. __________________ Capri306, Moderator The Mustang Works Online 1979 Mercury Capri 1987 5.0L Mustang LX Notchback 1993 5.8L Eddie Bauer Bronco

03-15-2005, 12:59 PM	#3
LX5liter dude5l Join Date: May 2001 Location: Grande Prairie, Alberta, Canada Posts: 603	Re: EFI Problems Are you going with speed density or mass airflow? Unless the harness is from a California car it will be a speed density unit. __________________ Good luck! Brad R. 1992 L.X. 5.0 coupe MODS: A few little bolt ons New Best time ...11.60 @ 128 mph @ 2000+ ft altitude. Rice Haters Club member #39 Users rides #2542

03-15-2005, 01:05 PM	#4
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: EFI Problems You need to get two things, a pin out for the year computer you're using and a wiring diagram for the year of harness/dash you are using. There are changes from year to year that will affect the overall wiring. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"

03-17-2005, 12:05 AM	#5
mustanginwork Registered Member Join Date: Mar 2005 Posts: 2	Re: EFI Problems well i fixed the problem it was the injecters all 8 were bad, thanks for the info