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Old 10-10-2013, 10:40 AM   #1
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94 F150 302 swap?

My 4.0 is dying so I'm thinking about putting a 302 in my YJ. I have the complete F150 so I have all the parts I would need except for the adapter plates and motor mounts.

I've been reading tons of posts about this swap but I haven't seen any about swapping a 94-95 F150 302 into a YJ. I talked to my friend that would be helping me do it and he says I'm going to have to get the computer reflashed to get rid of the evap and emissions stuff. Does anybody have any experience with swapping a 302 into a YJ?

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Old 10-10-2013, 10:46 AM   #2
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Make sure when you install the engine mounts you have enough clearance for the oil pan. You am also need to swap the plenum for a "car" plenum.

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Old 10-10-2013, 10:51 AM   #3
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I thought I might need a smaller intake. And I should have enough oil pan clearance, the pan is a rear sump and I have 5" of suspension lift. Will have even more if I decide to go SOA while I'm doing the engine swap.
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Old 10-10-2013, 11:50 AM   #4
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I have a 5.0 motor out of an F150 I'mm gonna install but want to switch it to carb get rid of all the efi
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Old 10-10-2013, 02:50 PM   #5
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I'm definitely keeping the EFI on mine. Carbs suck out on the dunes where I run a lot.
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Old 10-10-2013, 03:36 PM   #6
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To do it right your gonna need a better ECM and harness. I use ford racing efi harnesses and a9l mustang ecms. You may not need to swap intakes depending on your motor mounts. I have detailed pics in my build thread.
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Old 10-10-2013, 03:52 PM   #7
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Is the truck a 5spd? If so that would be a sweet swap.
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'88 YJ 4.6L stroker, HEI, MC2150, AX15 swap
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Old 10-10-2013, 05:56 PM   #8
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The engine I want is in my 94, with an auto. But I have a complete 89 with a 5 speed for the bellhousing donor. I don't want the Ford 5 speed, its the Mazda tranny. But I have a T18 sitting in the garage that may go in. Not sure yet.

I'm trying to get all the electronic stuff figured out before I decide which tranny to go with. Ibuildembig, do you have any links to the ecm and harness you use? Will they get rid of emissions and all that stuff?
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Old 10-10-2013, 10:41 PM   #9
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I thought that truck would have a zf-5, but maybe the 5.0's had a different bolt pattern than the windsors. I am not a ford guy.
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Old 10-10-2013, 10:49 PM   #10
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The 300, 302, 351 Windsor share the sane bell housing spread. The zfs were an f250/f350 thing with a 351. They are out there but spendy
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Old 10-10-2013, 11:32 PM   #11
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Ibuildembig, would the harness and A9L ecm you were talking about come in a 87 Mustang? I've been skimming craigslist and found a 87 with the 5.0l HO for $1k. Tranny is bad and body is rough, but it only has 58,000 on the engine. Would this be better than the F150 engine?
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Old 10-11-2013, 09:10 AM   #12
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No, what you really want is a mass air motor which would be 89-93. The reason is they are more swap friendly and they accept camshafts and mods easier. I would buy a ford racing harness (575.00) and find a A9L ecm online (100-150) and roll on. If you try to patch harnesses together your asking for problems. I do 12v wiring for a living and wouldn't try that.
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Old 10-11-2013, 10:20 AM   #13
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So would the 94 engine I have now work with the racing harness and A9L computer?
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Old 10-14-2013, 04:38 PM   #14
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Yes no issues there except you will need a mass air meter.
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Old 10-14-2013, 04:52 PM   #15
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Alright, thanks. I've been looking at a bunch of engines to swap in, and I'm trying to decide between the 302, 4.8 Chevy, and 5.3 Chevy. It's a big decision
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Old 10-14-2013, 05:08 PM   #16
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Ford 86 to 95 were Speed Density, not mass air. California models on 95 were, but all others stayed that way until the 96 MY. Mass air came with ODB-II. Speed density was EEC-IV. F150 and up. The EEC-IV systems have fewer sensors and can be fooled easy enough. The OBD-II units have twice the sensors and pull speed from the PSOM, not the rear diff. The PSOM is integrated into the speedometer. The truck plenum sits high indeed. It is easier to swap to a car plenum.

Best system would actually be out of a 96 or later Explorer.

Painless wiring has a harness that will get you to Mass air from Speed Density.

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Old 10-14-2013, 05:13 PM   #17
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Quote:
Originally Posted by Ibuildembig View Post
No, what you really want is a mass air motor which would be 89-93. The reason is they are more swap friendly and they accept camshafts and mods easier. I would buy a ford racing harness (575.00) and find a A9L ecm online (100-150) and roll on. If you try to patch harnesses together your asking for problems. I do 12v wiring for a living and wouldn't try that.
Does the Ford Harness replace the injector wiring as well? It's been a while since I turned a wrench on a Ford product. I do still have an '86 Bronco that I can relate to though.

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Old 10-14-2013, 06:29 PM   #18
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Yeah the new ford racing harness is all three harness into one. It's basically a 4 wire hook up and plug/play. I've had several maf trucks in recent years one 460 even. The motor won't care if it's a factory maf or not to answer the op. The explorer motors are a nice swap but tk you will need mustang fuel rails and injectors unless you wanna buy the adapters, and a distributor if you don't want to mess with the crank trigger setup. We swapped one into a 79 f150 a few years back and it will smoke the 33s and gets 17 mpg all day long.

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