Question bout converting 4 banger to 5.0 EFI

bosco · 05-30-2002, 12:29 AM

I have an ex 4cly that now has a carbed 5.0 on it. I am about to convert to EFI. I also have a friend that will convert a 4cly soon. Our question was, all we will need is the computer and engine harness correct? and it should hook up to the car just fine? will there be alot of splicing wires and fabricating going on? We basically just wanted to verify that the harness and computer would plug into the 4 cly dash harness and stuff like that

Unit 5302 · 05-30-2002, 12:31 AM

What kind of 5.0 is it?

bosco · 05-30-2002, 12:38 AM

Well, i have an 87 coupe, with an earlier model block, and i have already done all the roller conversion and all that stuff, its kinda a built motor. Now i want to put an EFI on it. I do plan on getting a tweecer so i can adjust the firing order and tune it. I want to use the A9L and a mass air set up, does that help a little? let me know what other info you need

bosco · 05-30-2002, 12:39 AM

I already have the computer and the harness. I jsut wanted to make sure that i can just install the computer and plug in the harness and be trouble free, when i do do the conversion, or will i need splice wires and fabricate the harness to make it work, and any other advice you might have

bosco · 05-30-2002, 10:48 AM

Unit 5302 · 05-30-2002, 06:01 PM

You'll need the proper distributor, ignition system electric fuel pump, and firing order.

fast88 · 06-01-2002, 09:34 PM

in order for it to be a plug in affair you will need a efi harness from a 87-89 stang.If you want it to be mass air it has to be an 89 .The 90-93 harness will plug in but you will need a 90-93 dash harness and column.Same goes for the computer. Here is a run down .

86 by its self

87-88 speed density

89 by itself only year with mass-air and no airbag

90-93

You can plug a 89 mass-air harness into a 87-89 car the dash harness in all those years including 4 cyl cars are the same.

As statedbefore you will also need the efi dist. and fuel lines

bosco · 06-02-2002, 12:41 AM

Thanks for the replies, its really appriciated. Im not sure what year engine harness i have, but if i had to guess, i would guess a 90's something. what about the mass air sensor, does that matter?

what would happen if i used a 90's something harness in my 87?

05-30-2002, 12:29 AM	#1
bosco Registered Member Join Date: Nov 2001 Location: austin TX Posts: 115	Question bout converting 4 banger to 5.0 EFI I have an ex 4cly that now has a carbed 5.0 on it. I am about to convert to EFI. I also have a friend that will convert a 4cly soon. Our question was, all we will need is the computer and engine harness correct? and it should hook up to the car just fine? will there be alot of splicing wires and fabricating going on? We basically just wanted to verify that the harness and computer would plug into the 4 cly dash harness and stuff like that

05-30-2002, 12:38 AM	#3
bosco Registered Member Join Date: Nov 2001 Location: austin TX Posts: 115	Well, i have an 87 coupe, with an earlier model block, and i have already done all the roller conversion and all that stuff, its kinda a built motor. Now i want to put an EFI on it. I do plan on getting a tweecer so i can adjust the firing order and tune it. I want to use the A9L and a mass air set up, does that help a little? let me know what other info you need __________________ '87 coupe, 308, world product windsor jr. heads, comp cams 220@.050/.512 @110 deg., roller cam,crane full roller rockers, 4bbl 600cfm holly carb,1 inch spacer, wiend aluminum intake, pullies, msd distributer/ignition, 1 5/8 bbk shorties, off road h-pipe 2 chamber flows, 3.73 posi rear end, P.S.T control arms, steeda tri-ax shifter, t-5, auto meter guages, and more to come (hopefully )

05-30-2002, 12:39 AM	#4
bosco Registered Member Join Date: Nov 2001 Location: austin TX Posts: 115	I already have the computer and the harness. I jsut wanted to make sure that i can just install the computer and plug in the harness and be trouble free, when i do do the conversion, or will i need splice wires and fabricate the harness to make it work, and any other advice you might have Last edited by bosco; 05-30-2002 at 11:29 PM..

05-30-2002, 10:48 AM	#5
bosco Registered Member Join Date: Nov 2001 Location: austin TX Posts: 115	bump __________________ '87 coupe, 308, world product windsor jr. heads, comp cams 220@.050/.512 @110 deg., roller cam,crane full roller rockers, 4bbl 600cfm holly carb,1 inch spacer, wiend aluminum intake, pullies, msd distributer/ignition, 1 5/8 bbk shorties, off road h-pipe 2 chamber flows, 3.73 posi rear end, P.S.T control arms, steeda tri-ax shifter, t-5, auto meter guages, and more to come (hopefully )

06-01-2002, 09:34 PM	#7
fast88 Registered Member Join Date: Mar 2002 Location: Rockingham,N.C. Posts: 80	efi swap in order for it to be a plug in affair you will need a efi harness from a 87-89 stang.If you want it to be mass air it has to be an 89 .The 90-93 harness will plug in but you will need a 90-93 dash harness and column.Same goes for the computer. Here is a run down . 86 by its self 87-88 speed density 89 by itself only year with mass-air and no airbag 90-93 You can plug a 89 mass-air harness into a 87-89 car the dash harness in all those years including 4 cyl cars are the same. As statedbefore you will also need the efi dist. and fuel lines __________________ 88 Notchback orig. 4 cylinder car with a efi v8 swap from a wrecked 89 5.0 hatch,edelbrock performer rpm's 190/160,typhoon intake,comp cams 1.6 rockers,65mm tb and spacer,pa performance c4 w/ 3000 stall,3.73's auburn pro, 31 spline mosers,mac off road h-pipe,1 5/8 shorties ,and 2 1/2 pro dumps,kirban fpr,190 lph walbrp. SOON TO BE BLOWN!

05-30-2002, 12:31 AM	#2
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	What kind of 5.0 is it?

05-30-2002, 06:01 PM	#6
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	You'll need the proper distributor, ignition system electric fuel pump, and firing order.

06-02-2002, 12:41 AM	#8
bosco Registered Member Join Date: Nov 2001 Location: austin TX Posts: 115	Thanks for the replies, its really appriciated. Im not sure what year engine harness i have, but if i had to guess, i would guess a 90's something. what about the mass air sensor, does that matter? what would happen if i used a 90's something harness in my 87?

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