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ok so here goes, not sure why this happend, but I was doing some substitution with the wires, first taking the one that I was getting spark out of and switching it with the one right in front of it at the plugs, leaving the distributor end of the plugs the same, sure enough the spark stayed in...

good to hear, now I can move on to something else. I found this vacum device with some wires going to it. I belive the wires go to the fuel injector harness. and the other end of the vacum hose goes to the upper intake manifold underneath on the drivers side. I can't seem to figure out where to...

One Spark Update allright, a little update and a few more questions. first off for anyone new to my problem I am working on a 66 mustang with a 5.0 motor and T5 from an 86 5.0 mustang, I am keeping the Fuel Injection and I have transfered all three main wireharnesses over to the 66, the Main...

ok replaced the fuel pump relay, and now the fuel pump comes on WITH SOME HELP, I have to turn the key ON, then run a ground wire from the pump to the chasis, something isn't right with the factory gound wire I guess. and I have that test connector under the hood jumped to ground, but the fuel...

ok I believe the fuel pump relay is bad.however I don't think this is the main problem. the fuel pump was working, it was staying on all the time when the key was on. somehow I went around the fuse link and just wired it straight to the connector comming from the computer. that problem is fixed...

Just a thought. what if I have the fuel lines reversed. I have the hard line running from the tank, that's the easy part. then I have some rubber hosses connecting the hard line to the fuel rails. maybe I crossed the lines right before the fuel rails, I have been trying to find some pictures of...

Checked Salt and Pepper connectors cleaned them up, same deal. Thanks Ford Kid

Salt and pepper connectors, not sure which ones those are. you talking about the ones right there on the firewall as the main harness comes through on the passenger side. Thanks Ford Kid

Sorry- I am keeping the Fuel Injection. The fuel pump is aftermarket external, and did not come on the 66. so if I am understanding correctly it is normal for the aftermarket fuel pumps to run constantly. I am using the stock 66 fuel tank. the motor is a H.O motor. I only removed...

How do you check to see if the relay is stuck? Never had the distributor out. took the complete engine and trans in one unit and transfered it over to the 66. only unplugging what I needed to, to remove the engine. Thanks Ford Kid

Ok, tried to start the 86 5.0 that I put in my 66 mustang. leaving everything stock for the 86, two things that are going on, first, the fuel pump does shut off. I can hear it running and running and running while the key is turned on. the fuel pump shuts off once the key is turned off. I am...

yea that's what I decided to do. I am routing the lines from the 86 in. I am having to re-bend them in a few spots with a tubing bender of course, but I think it's going to work. the only thing that is being a pain is the end of the lines by the tank. since there is so many bends in that area...

well cost isn't the problem, since I allready have the fuel line. I have 28 feet of the rubber line. the hardline that was on the 66 is shot. I could try to take the hardline off of the 86, the bends are a lot different but I can always bend the hardline again using a tubing bender which I...

Hey guys, posting this here because of the EFI setup on a 5.0 motor even though it's in a 66 mustang. Quick question about the fuel line. I have 30 feet of 1/4 inch EFI fuel line. I went with 1/4 inch because the fittings on the external fuel pump and the fuel filter are 1/4 inch, the motor is...

Yea I am fairly certain it's a wire problem. I have no voltage on that wire when the key is ON, and only 3 volts when the key is turned to the START position. Thanks Ford Kid

Hey, the little wire going to the little screw post on the starter relay only has 3 volts when the ignition is turned to the start position. since there is some voltage you think I should be looking for another bad ground. or is the switch bad. the switch wasn't bad when I took it out of the...

Hey guys/gals Things are looking up. I am fairly sure I have a wire problem. before I spend hours looking for it thought I would check and see if anyone can narrow it down for me. I hooked up the ground wire I was forgetting about. and checked the rest. they look good. when I turn the key...

Holy crap I'm an idiot. Completely forgot about the ground wire comming from the engine block going to the firewall. I will also double check all the other grounds. and that's easy enough. always only one wire going to the left post. Thank you so much, your guys's help is greatly...

Hey, I have searched since I figured this question has been asked before. the only thread I found had different wires then mine, so here I am. first off I am posting this question here because the engine, transmission computer and BOTH wiring harnesses are from an 86 5.0 it is in a 66 mustang...

yea I know I needed the high pressure fuel system, just needed to figure out how to get the return line pluged into the tank, what I did was drilled a whole into the stock fuel pickup, and silver solderd a pipe in there. it's strong and has no leaks as of right now. of course I haven't driven it...