94 f150 bought a new/rebuilt engine

[chris mcc]

bought a new/rebuilt engine for my truck from a local engine rebuilding place where i live and the engine they gave me has a diffrent firing order than my orig engine and i want to know if i have to change any thing to make this engine run correctly change any thing like the ecm both engines are 302 roller engines and supposedly i have the lightning cam in this engine they sold me i took the orig firing order in with me when i went to get the engine so i still have no idea how this got messed up and both engines are roller enginse i had to put the intake and stuff on the new engine so i am sure it is roller my origional engine firing order was1-3-7-2-6-5-4-8 new engine firing order is1-5--4-2-6-3-7-8

[freakboy]

change the distributer wires around so it runs. but if it runs as is keep it as is.

[Conanski]

Is your truck mass air? If so and you actually do have a cam in there with the old 5.0 firing order then you have a problem. In this case you have 2 choices, move 4 injector wires so it idles smoothly and live with the motor.. which will be weak compared to what you had, or change the cam to one with the correct firing order.
As far as I know there is only 1 Ford roller cam with the old 5.0 firing order, it was used in the late 80's cars and '92-93 trucks and is quite a bit smaller than the F4TE cam that you had originally. The 5.8 truck motor always used the 13726548 sequence and didn't get a roller cam until 1994.. which was the F4TE cam, and it was definitely not used in the Lightning 5.8 because that motor got a flat tappet cam.

[chris mcc]

can you tell me what 4 injector wires i have to move that wont be a problm to move the injector wires and secound thing is i know with this firing order i do have a roller engine i bought it at a local rebuilder but i am 100% posative it is a roller engine now the power i am not sure but i can also say i cant change internals because it is a 3 yo warranty engine the other question i have is if they used a aftermarket can they could have still given me the power i am supposed to have correct?

[Conanski]

Wires for injectors 3&5 and 7&4 have to be swapped.

Fr: 13726548
To: 15426378

[chris mcc]

i changed the injector wires as you told me and the truck still runs like crap no smooth idle have good compression good spark i am fairly sure i have good fuel and no vaccume leaks
any thing any one can think of




am almost at this point lol

[Conanski]

You have the plugs wired for the same firing order too right?