Does any one know if their is a carburater intake manifold avaliable for a 89 or newer 460? What is the difference between the old 460 heads and the new ones? Is there a chance I could machine a old intake to work, or weld up the injector holes in a new one and make a adapter for the carb? If I weld up the holes and put a carb on it will it still flow right?

 

I think the EFI head intake ports are at a different "elevation" than the carb ports. This'll create problems mating an old carb intake to the EFI heads.

 

You could also swap out heads to match the intake, if you have to have a carb. I'm assuming you're having problems somewhere and want to get rid of the computer control or you are wanting to modify the truck for some reason. With more details we could help more.

 

My truck is a 79 F-350. I put a 93' 460 into it. But it just doesn't have the power I think it should. I know It is wired up correctly, I have tripple checked it, and have had friends check it. The only thing I'm not to sure about. Is that The wireing I use was from a 89' truck, I tried using a computer from that year and it wouldn't run at all. So the computer that is in it now is a 93'. Is any of the componets like O2 sensor, map, tps, etc different from 89' to 93'?

 

If the computer is having problems, it "might" tell you. Check for error codes. Sometimes it will tell you one thing and mean something else though. For example you have a bad injector but it doesn't pick that up. On that cylinder, it'll run lean. The O2 sensor tells it's lean and relates to the PCM , which richens all 8 cylinders. You check for codes and it says O2 sensor indicates lean. But you know the truck is running rich. You can tell by looking at the plugs. Some people jump to conclusions and change the O2 sensor. We have to get info from the truck and figure out the problem before we can find a solution.

I am not familiar with EFI 460, just the smaller engines so I can't help on the wiring/sensor issue. Sometimes the PCM has to be more specific to the truck. Since yours is a '79 it may help or hurt. What trans do you have? More than likely you have a manual or C6 so the PCM isn't governing the trans. If you did install E4OD you'd need a PCM from a truck with E4OD. However, you don't have trans trouble so I'll try another angle. If the PCM is from a California equiped truck it may require more than what you have. I'm sure there are differences between trucks and years. If you got it all wired up, you are ahead of me. I would have to use a MAF conversion just to get it wired and running. If you don't have enough power I'd look at 1) Did you run the truck with another engine? Maybe the gears are taller than necessary. If you ran it before, you have some expectations for the truck. 2) I'd check the engine for codes. I'd try to remedy any any problem there with sensors and such. 3) I'd check compression on engine to see what shape its in. 4) I'd check fuel supply and ignition. If the truck's engine is running properly, it should have as much power as a '93 460 although used. I could go further but I still couldn't answer you're questions about the wiring. Check for codes and let me know the result. If it says there's an error with a sensor, we might be on track. Parameters for reference voltage may vary between sensors, though Ford should have changed the plug to keep us from using it. Good luck. By the way, I know some emission stuff was changed on '92 up 5.8. You do have same year engine and PCM though. If the wiring hooked up, I'd think it would be enough.

 

Ford made changes to the 460's heads for 93. The 89 computer should have been able to run the 93 engine, though not perfectly.

In 89, the TFI module was still mounted on the dizzy. By 93 it was seperate. Perhaps you didn't get it hooked up right.

 

Thank you for all the sugestions. I will try those things over the weekend and let you know what happens. Braidy