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I Have A 87 Mustang That Changed To Mass Air, I Got A 93 Mass Air And Computer That Had A Auto In It My Car Has A 5-speed. Now The Car Don't Start Up. It Just Turns Over But Don't Start. Does The Auto Make A Difference? I Set The Firing Order To The 93 And Still Nothing, The 93 Harness Has More Plugs On It, Do I Need The 93 Relays As Well? Has Anyone Else Had This Problem?
 

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They do have different computers but you can use an auto computer in your 5speed just cant be used the other way around
 
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