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Discussion Starter · #1 ·
I have a 91 f-150 with a 5.0 and I think it does not have the 5.0 ho or 351w firing order.My question is if I change the firing order of the cam (change to a 5.0 ho cam) do you need to change the injector timing?
 

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I think all the 5.0 non-HO motors had batch fire injector timing so it doesn't really matter what the firing order is. I think one side fires and then the other does, maybe all 8 fire at once, pretty sure it isn't sequential.
 
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