5.0 MAF conversion questions.
Freshman User
Joined: Oct 2009
Posts: 38
Likes: 0
Ford Fuel Injection Wiring Harnesses check that out it will tell you everything you need to know about the computer differences has charts an the fuel injection difference firin order an everything. Pretty simple. I had to rewire mine because I had a 94 bronco harness outta a HO motor, it was sequential, and I didnt have the computer for it, I was usin an older comp. and motor outta an 88' that was bank firing to get proper fuel with older computer.If you use the 95 harness, an computer, it will work. You only have to rewire it if you try to use an older computer and motor . 94 to 96 has the SFI
Lead Driver
Joined: Nov 2002
Posts: 9,558
Likes: 45
From: Concord, NC
Not all 94 and 95 trucks were mass air, and only the ones with mass air were SFI. The wiring pinout might be different between the mustang MAF computer and truck MAF computer as well. Just keep that in mind when looking for parts.
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Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
ok well i didn't have time to dig in the junkyards today, but tomorrow i will call around and try to find a '95 computer, harness, and MAF. hopefully with all that i can just put it all in the truck and have it work correctly.. am i right with this? i think i am... haha. i will read through that link tomorrow. thank y'all for the input so far!! hopefully we can get this thing up and running this weekend!! i'm getting excited 
this truck hasn't been driven in the last 2 years so i'm sure its looking forward to driving again! that is after i change all the fluids and everything.
this truck hasn't been driven in the last 2 years so i'm sure its looking forward to driving again! that is after i change all the fluids and everything.
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Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
hey guys. i was really confused on the MAF, but upon more research im starting to figure it out i think. if i get stang computer A9L which is sequential MAF, of course the MAF sensor(going summit probably 73mm).. do i need to install another O2 sensor using this computer? i'm not sure which year model A9L was from either, but i know its a stang mass air computer. haha.
Does anyone know where i could find an overlay harness so i can use my harness and then use the over lay harness to wire in the injectors and MAF meter? or should i forget that and use a '95 F150 harness with the F150 computer or should i use the A9L? is there an advantage to using the stang or F150 computer? the whole reason i'm confused is simply because there are so many people that did this conversion so many different ways that i don't know which way would be the best way to do this. i am now up to using the B303 cam b/c the place i bought the E303 couldn't have it to me in time so they sent the B303. LoL.
Thank y'all so much for y'alls help. if y'all could let me know if i should get an overlay harness and possibly point me in the direction of one or if i should get the F150 harness that would be great. i'm learning a lot about this truck so far!!!
Does anyone know where i could find an overlay harness so i can use my harness and then use the over lay harness to wire in the injectors and MAF meter? or should i forget that and use a '95 F150 harness with the F150 computer or should i use the A9L? is there an advantage to using the stang or F150 computer? the whole reason i'm confused is simply because there are so many people that did this conversion so many different ways that i don't know which way would be the best way to do this. i am now up to using the B303 cam b/c the place i bought the E303 couldn't have it to me in time so they sent the B303. LoL.
Thank y'all so much for y'alls help. if y'all could let me know if i should get an overlay harness and possibly point me in the direction of one or if i should get the F150 harness that would be great. i'm learning a lot about this truck so far!!!
Postmaster
Joined: Jan 2009
Posts: 4,558
Likes: 2
With the mustang computer it will need two 02 sensors , Also the rev limiter is set alot higher than the truck computer . Both will be sequential if its from a MA truck . Check out pro m racing , they have all the harnesses & meters for the conversion .... Lew
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Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
Lew, thank you for that. that was helpful!! i pretty much suck at reading wiring diagrams unless its VERY straight forward and the ones i been looking at arent that straight forward. LoL. so that helps a lot. is it better to have 2 O2 sensors?? i'm going to have to get a bung and put it in for the one anyways b/c i'm getting ALL new exhaust from the headers back. i would assume 2 is better b/c it can read more accurately using both sides. i will check out Pro M. i just want to make this as SIMPLE as possible b/c while i can wire in some pretty good stereo systems and what not this is totally different. haha. Do you think this would be the most simple route or the '95 harness?? THANK YOU SOOOO MUCH!!! 
5th Wheeling
Joined: Oct 2005
Posts: 41
Likes: 0
From: Louisiana
I'm following this thread faithfully. I'm doing what seems to be the exact thing this fella is doing, and I'm lost as to which setup to use as well. Somehow, I keep getting stroker engines and bigger displacement thrown at me instead of more pinpoint information. Threads have a way of doing that. 
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Hotshot
Joined: Jun 2007
Posts: 10,008
Likes: 7
From: Austin, TX
I'm following this thread faithfully. I'm doing what seems to be the exact thing this fella is doing, and I'm lost as to which setup to use as well. Somehow, I keep getting stroker engines and bigger displacement thrown at me instead of more pinpoint information. Threads have a way of doing that.
well i STILL haven't gotten mine running so don't follow any of my examples. haha. actually my engine is still sitting in the shop b/c i haven't figured out how to make this intake manifold work yet with the vacuum lines and everything.
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