engine swap


Old 10-12-03, 11:46 AM
Visiting Guest
Posts: n/a
engine swap

Can anyone tell me if I can put a 1990 Ford 302 with fuel injection that came out of a full size Bronco into a 1989 F-250 that has a 351 fuel injected motor in it. If so do I have to change any wiring.
Can I use the computer thats in the 250 or should I use the one from the Bronco. Both vehicles are 4WD. The 250 has a standard transmission and the Bronco is a automatic.
Any help will be greatly appreciated.

Sponsored Links
Old 10-12-03, 01:48 PM
billys68ss's Avatar
Join Date: May 2003
Location: USA
Posts: 1,459
Received 0 Votes on 0 Posts
The engines are virtually the same dimensions as far as the mounting goes. just do the usual swaps...ie. Flywheel, mounts etc. If the fuel injection is the same type then the computers should be similar. If it is different types of FI then you will probably need to swap the computers.
Hope this is helpful ta ya,
Old 10-12-03, 06:13 PM
Visiting Guest
Posts: n/a
Why would you downsize the motor? There won't be any fuel savings, but power and towing if you use it for that will likely suffer.
Old 10-14-03, 10:48 AM
Visiting Guest
Posts: n/a
The automatic will more than likely have a different CPU than the standard.
The 302 will have different computer tuning than the 351 as well.
This probably wont cause ill effects, but I would swap them out just to be certain.

The injector harness will work, and the other wiring should be the same, verify if the connectors for the MAS/TPS/MAP..etc sensors are the same.
Old 10-14-03, 11:25 AM
coops28's Avatar
Join Date: Feb 2002
Location: Kansas City
Posts: 1,752
Received 0 Votes on 0 Posts
Unless the 351 is unrepairable then keep it. The 302 is a dog.
Old 10-14-03, 06:17 PM
mike from nj
Visiting Guest
Posts: n/a
the computer is usually pre-programmed for a specific engine size, in terms of timing and especially injector sizing and flow rates. i also think the ford computer is specific for a manual or automatic trans

more importantly----ford is the KING of having weird engine packages, in terms of internal vs. external balancing, (remember the 351 cleveland and 351 windsor, nothing was interchangable!)
the flywheel and flexplate probably have different weights for the different engine balancing requirements, and even if you swapped them, it still might not be right. the result will be a shorter life for the engine and a constantly rough idle(out of balance)

if both engines are internally balanced, it would be a possible swap, but i don't know that answer.

my vote---fix the old engine or find a salvage engine that's exactly what's being replaced.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title: