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1990 5.0L Firing Order

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Old 11-01-2005, 07:51 PM
TheRoadVirus TheRoadVirus is offline
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1990 5.0L Firing Order

What's the firing order on my 1990 F150? It's apparently been converted to a Mustang GT computer, but I can't verify that for sure. I do have the old computer in my closet, though. (The old owner gave it to me..)

The reason I'm asking is because with the Ford Racing MAF conversion kit I'm buying won't it be using the Mustang firing order? Which if I'm not mistaken is different from my truck? How does that work.. Also; does anyone know which tuner I should buy after doing this conversion.. should it be the mustang one or for my truck.. SCT Xcal 2 is what I'm looking at.

Thanks.
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Old 11-01-2005, 11:42 PM
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EPNCSU2006 EPNCSU2006 is offline
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Truck firing order is 1-5-4-2-6-3-7-8. The mustang computer is set up for the 1-3-7-2-6-5-4-8 order. The kit wires the truck injectors so that they fire in sequence with the truck firing order (switches 3 & 5 and 4 & 7). If you tune the MAF computer, it will need to be for that computer, not for the truck. Blurry94 knows much more about the tuning aspect than I do.
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1990, 1990n, 1997, 302, 50, 50l, explorer, f150, firing, ford, gt, mustang, order, straight, truck

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