351w swap help
6th Gear
Joined: Mar 2024
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The firing order on the 302 is 1-5-4-2-6-3-7-8 and the 351 is 1-3-7-2-6-5-4-8. So if I run the 351 firing order it should be fine?
Thanks, Joel
Last edited by joe21972; Mar 19, 2024 at 03:50 AM.
Mountain Pass
Joined: Dec 2020
Posts: 165
Likes: 50
From: Nebraska
Bank fire means that the driver side fires all four injectors at the same time then the passenger injectors all at the same time. The 1994 5.0 and later had sefi which is sequential firing so only the cylinder on its intake stroke would get a squirt from the injector.
Fleet Owner
Joined: Oct 2005
Posts: 20,789
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From: Kentucky
On V8s the injector firing is 1,4,5,8 then 2,3,6,7
Ford Speed Density EFI is batch fired, not bank.
6th Gear
Joined: Mar 2024
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thanks. So if I use the 302 wiring but run the 351 firing order it should work correct?
Mountain Pass
Joined: Dec 2020
Posts: 165
Likes: 50
From: Nebraska
Yes it should work for you. The only difference I can think of is that the 5.0 engine harness will have a knock sensor at the back of the engine. The 5.8 does not have a knock sensor. At least there isn't one on my 94 F250 or my 94 Bronco, both 5.8 Speed Density EFI. I would guess that you could just leave that plug hanging and be alright. Maybe I missed something, why not run the 5.8 engine harness on the 5.8. In the 1989 models, is there a plug on the drivers side fender to plug the engine harness into with a 10mm bolt? The 5.8 harness should plug right in there.
FTE Legend
Joined: Jun 2006
Posts: 31,930
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From: Ottawa, Ontario
Yes it should work for you. The only difference I can think of is that the 5.0 engine harness will have a knock sensor at the back of the engine. The 5.8 does not have a knock sensor. At least there isn't one on my 94 F250 or my 94 Bronco, both 5.8 Speed Density EFI. I would guess that you could just leave that plug hanging and be alright.
Because of wiring harness differences. In this case the motor came from a van so it will be pinned and loomed differently than the pickup version. Elecrtrically both motors are the same so either harness could work but the 5.0 pickup harness is guaranteed to make the project plug and play while the van harness will need to be modified.
Mountain Pass
Joined: Dec 2020
Posts: 165
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From: Nebraska
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6th Gear
Joined: Mar 2024
Posts: 6
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Thank you all for the reply’s
Thanks everyone. Feeling more confident about this swap now. Van will be much better with the 351. This is my first go swapping with fuel injection and everything that goes along with it. So much to learn. Or maybe I’ll stick with my older stuff. Pre 79 and I have an idea what I’m doing. Thanks again
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
Hey Joe what trans is in your truck now? If it has an AOD you cannot use the flexplate that is currently attached to the 5.8 it will destroy the pump the first time the engine is started. This combo requires a unique flexplate that was only ever factory in an mid '80's crown vic. If the truck has a C6 then the flexplate s good to use.
Hotshot
Joined: Jun 2015
Posts: 12,885
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Hey Joe what trans is in your truck now? If it has an AOD you cannot use the flexplate that is currently attached to the 5.8 it will destroy the pump the first time the engine is started. This combo requires a unique flexplate that was only ever factory in an mid '80's crown vic. If the truck has a C6 then the flexplate s good to use.
6th Gear
Joined: Mar 2024
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sorry for the delay. Just got back home to get info.
Transmission code is T. Which I believe is the AOD
I'm wanting to upgrade the van. The 302 has 400k on it and dropped a cylinder. Would not pull hills without constant shift down before loosing cylinder.
If I have to find rare parts I’ll probably just rebuild the 302.
Transmission code is T. Which I believe is the AOD
I'm wanting to upgrade the van. The 302 has 400k on it and dropped a cylinder. Would not pull hills without constant shift down before loosing cylinder.
If I have to find rare parts I’ll probably just rebuild the 302.
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