so im buying a carbed 302 to replace my efi 302 in my 86 2wd f150... my question is what else would i need to complete this swap.. i have an AOD trans already there in need of a rebuild .. so i might as well do that while im at it... the motor im buying came out of a mustang a while ago then in his truck .. now im buying it from him , he said i need to switch to a standard ignition? i have no idea what that really means or what parts i would need.. do i need a new wiring harness , computer? he said aside from the ignition the motor is complete and has a cam ,different heads , intake ,carb, and its a roller motor... any advice on what to do would be greatly aprecciated and any advice on what to do trans would help alot too...
I think what he means is that you will need a stand alone ignition system when you switch from EFI to carburetor. If you don't, your ignition will not be able to advance because it will be looking for computer signals that will no longer be there when you switch to a carburetor.
Your present EFI system has a computer located under the dash that controls the fuel injectors, engine sensors, smog equipment, and ignition timing. ALL of these signals are read and the computer makes adjustments to make the engine the most efficient.
The ignition system you have now is computer controlled. You need to swap it out to something like points ignition or the Ford Duraspark ignition. This is the ignition system used on Fords when they still used carburetors. In addidition to the carburetor, you are going to need:
1. Distributor
2. Cap and rotor
3. Coil
4. Ignition module
5. Wire harness to connect everything together
Get all of that replaced and then your computer and all of the electronic engine sensors will not work. If you have smog testing in your area, YOU WILL NOT PASS WHEN YOU DO THIS!
Do a search for "Duraspark" and you will find many people, including myself (I switched from an electronic "feedback carburetor" system), who have made the swap.
Yeah, Franklin is right. It makes some sense to go from the electrical feedback carburetor to the earlier, more conventional mechanical setup. But to go from a complete EFI system to a mechanical system would be a big mistake for a daily driver street truck.
Keep the EFI system and you will save yourself a lot of headache, money, and aggravation.
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