EFI and other questions
I've got the engine in, trans crossmember made and bolted in and the driveshaft
(out of the Lincoln-fit perfectly BTW) hooked up.
The Lincoln was SD and I'm converting to MAF. I've got a A9P computer, harness, and 19lb injectors. I've got the injectors in and a MAF meter on the way. I'm now ready to put the plenum back on but there was a coolant tube running along the right side of the engine. Do I need that? I had someone else just drop the engine in so, I didn't see how all that was routed in the Lincoln.
There's also a connector and wires coming off the right side of the injector harness that I don't know where it goes to. The wires were cut by someone else. There's one to the (what looks like) the temp sender and one to some other thingie on a coolant outlet. ???? Then this extra one. Vague, I know. Sorry this is my first contact with EFI.
Also, I see I need a MAP or BAP sensor. I've read where they are the same animal, just hooked up differently. MAP connected to manifold vacuum and BAP open to the atmosphere. Is that correct?
Next is the TAP, TAB or something or other. Are those the little do-hickies that were mounted on the fenderwell of the Lincoln or something else?
I believe they had vacuum and electrical hook ups. Two thingies side by side on the right hand fenderwell.
I got a book on the Lincoln but, it's not clear on those.
Do I even need those?
Oh, one more thing is the fuel lines. The feed from the tank/pump is at the back of the engine and the return is at the front. Correct?
Can those special fittings be bought? What's the best, safest way to attach fuel lines to these?
I know that's a lot but, I've got a lot to do before I fire this puppy up.
I've been to the page here on doing the swap but, these are things I didn't see covered in the text.
But, that don't mean they aren't there.....
Thanks,
Jeff
Yes, you can just remove the vacuum line from the MAP sensor. That is what I had to do when I converted my 88 5.0 Mustang to MAF. Leave the wiring plugged in.
There should be a Collant temp sender (small sending unit) for the gauge and a larger one that the ECM uses with 2 wires to control the timing/mixture. Then there is probably a IAT sensor in one of the front intake runners which tells the PCM the air intake temp. It looks very similiar to the coolant sensor, but the plugs are reversed.
I believe that the thingys that you speak of may control the smog pump valves in the hoses to direct the air to either the rear of the heads or downstream in the exhaust.
The fuel system was the hardest part of my EFI swap. The larger line on the fuel rail is the feed and smaller is return. You'll need special fuel injection line to run to the tank. Are you planning on using a high pressure in-tank pump, or an inline pump? The best way IMO is swap complete lines from a donor vehicle as it's a pain to splice and bulk line is expensive. They do make rubber hose for fuel injection, but it that should be kept to a minimum.
Last edited by brown 4x4; Mar 3, 2007 at 07:40 PM.
To answer the first question about my questions, the engine/trans is out of a Towncar.
After getting the harness out of the Towncar, I noticed several wires pulling out of some of the plugs. If it had only been one or two I would have just fixed them but, there were many. So, I found a guy on ebay that sold harnesses that he pulls and cleans up and removes unneeded wires. (headlights, marker lights etc and the TAB and TAD wires) So I got one of his. It included the main harness and the injector harness.
I'll use my old O2 harness and the one from the tranny. (I don't know where that wire(s) goes either)
The guy that pulled and dropped the engines for me is a....well let's just say he doesn't work on Fords much. He was good about not cutting wires but, there were two or three that got cut somewhere along the line. And he cut the fuel hard line.
On the back of the engine there's a hard line that connects each head (best I can tell)
and comes around into some kind of valve. Was that some of the smog pump stuff too? The valve was rusted and broken anyway. Can I just remove it and plug the heads?
I listed in the resgistry with a little bio of the truck if you want to see more about why I'm doing this.
https://www.ford-trucks.com/forums/3...gistry-17.html
#248
The hard line on the back is for the smog pump. I usually cut the pipe about 1 inch from the fittings that bolt to the heads, Crimp them flat, then solder them so that exhaust doesn't leak out, then just bolt them back on the heads.
I got my MAF meter the other day and I noticed it has a different plug than my harness.
The MAF I got is for a 96 Mustang 75MM. Can I just replace the harness plug or replace the hot wire box with one that will fit my harness?
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I know I'll need to add fuel pump(s) etc. I've been going by what others have done and reading up on the subject but, the tranny stuff is something I haven't seen covered yet.



