New Engine stuff

[Ranger5.0]

Ok, so, its finaly time to get me a new engine. I was woundering if the H.O wireing harness is different then the non-HO harness? i;ve heard two storys on this and need to know the low down befor i get goin on this. Im colecting the parts and hope to get it done in two days as long as im not waiting for parts. Im ordering a reman' motor from a reputable shop, geting a used H.O Throttle body and buying the 19lb injectors. My old 5.0 engine was a wanna be H.O and i think the coble fooking that was done to make it work is partly relatedto it dying. I was using the non h.o injectors and throttle body/ecm with a h.0 shoft block with un known heads on it. so it was truly a mut haha. anyways, i know the basics about what extra plarts to plan on replacing, i juss need to know abour the wireing harness. also, the intake plenum and intake manafold are the same for the h.o and non h.o engines right?

 

[baddad457]

the intake plenum and intake manafold are the same for the h.o and non h.o engines right?

No, they're differnet. They look alike, but they're not. At least the upper anyway. It's really hard to understand the rest of your questions with all the spelling errors, you really need to work on that if you want intelligent answers.

 

[Ranger5.0]

ok
Is the wireing harness for the 5.0 H.O the same as the NON H.O engine, or is it just the ECM thats different. Also needed to know about the intake. What is different? Runner dimensions or do they flow better.?

 

[baddad457]

That I can't tell you, only that the uppers have different casting numbers. So Ford changed something between them. There were a couple members here or on the RPS forums that went over all that a few years ago. I believe the harnesses are the same, just the ECM different, that is comparing SD to SD and MAF to MAF.

 

[Ranger5.0]

Baddad-
Ya, he told me about some different #'s back in the day, but they all match up to two different intakes, but they are interchangable. I know they have tow different runner styles, but thats more of a issue whith not being able to mix and match plenums to intake manafolds, which isnt my issue. Thanks for the input about the harness, thats good news.

 

[SRL]

Check out this link from a Cougar/T-bird site doing an HO conversion. It helped me a ton.

http://www.coolcats.net/tech/advanced/ho_conversion.html

Only thing different I'd point out is that the ECM code you're gonna want will be either a A9L or A9P.

 

[Ranger5.0]

thanks man. My problem is at this point im prity damn sure what i need, but now im having issues with availibility. There are a lot of different ecm codes that work have the h.o programing. Im sticking with SD and i think thouse are mass air ecms....

 

[Psychopete]

Im sticking with SD and i think thouse are mass air ecms....

Just curious - Why?

I believe my friend's 93' HO was sequential injection, my 87' non-HO 5.0L was multi-port (bank fire/non-MAF/grey top injectors). I don't know the whole history of things, I really don't know a lot about the wiring, but I will tell you that you should get copies of the diagrams of the donor of the wiring harness, and diagrams of the donor of the PCM and go from there.

It might be in your best interest to go carb. or go with something more plug and play. I am not even going to mess around and get a painless or Ford Racing harness to avoid any issues in a used harness. I don't want an electrical gremlin I am going to spend a year trying to find.

Pete

 

[Ranger5.0]

Why am i sticking with Speed Density? because its what i have now, and it works fine for me. I have the wireing harness, and are you sure the 87 bank fire? Im not getting anything from a doner vehicle either, the engine came from a shop in Toronto, the injectors TB/Egr Spacer and ecm came from ebay. I dont like carbs either, they went out with bell bottoms in the 60's. I like the dependability and driveability of EFI.

 

[Psychopete]

On the MAF convserion for my 2.9L, I only needed to add 2 pins to the 60-pin harness. I imagine the 5.0L would be somewhat similar.

I have the wireing harness, and are you sure the 87 bank fire?

Woops, that was my mistake. You're right, I dug up the manual, and it's clear by the wiring diagram that it is in fact sequential fuel injection, I don't know what made me think that.

I dont like carbs either, they went out with bell bottoms in the 60's. I like the dependability and driveability of EFI.

That's more of a preference, honestly there's nothing really wrong with them except for the fact that they're "crude". A cave man can install a carburetor, but it sounds like you're going to put your self through a little bit of a hassle.

Pete

 

[Ranger5.0]

how am i putting myself through a hassle? Im already runing a 5.0 EFI in my truck?

 

[Ranger5.0]

I used to run a carb when i was younger. But i do a lot more then just highway driving, and smoth flat trials and mud. I get into some pritty weird situations when carbs always let me down. When ifirst worked with EFI i hated it, now that I understand what al lthe sensors and drivers do its not all that hard. I juss dont know alll the details about FORD ecms. I work for deere and deal with diesels all day...