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1986 Ford F250 302 EFI Delete

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Gary Lewis

Re: 1986 Ford F250 302 EFI Delete

Administrator

The 400 is a much-maligned engine, just like its little brother the 351M. But the 400 could really have been something to love - if they hadn't retarded the cam dramatically and stuck a 2bbl on it. I know a guy that put a straight-up timing set and a 4bbl on his 400 and claimed it doubled the power.

So don't give up on the engine, it is quite capable if you just give it some love.

Gary, AKA "Gary fellow": Profile

Dad's: '81 F150 Ranger XLT 4x4: Down for restomod: Full-roller "stroked 351M" w/Trick Flow heads & intake, EEC-V SEFI/E4OD/3.50 gears w/Kevlar clutches
Blue: 2015 F150 Platinum 4x4 SuperCrew wearing Blue Jeans & sporting a 3.5L EB & Max Tow
Big Blue: 1985 F250HD 4x4: 460/ZF5/3.55's, D60 w/Ox locker & 10.25 Sterling/Trutrac, Blue Top & Borgeson, & EEC-V MAF/SEFI

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

In reply to this post by Phillip G.

The harness should still have a resistance wire built in, if you want to use the DSII coil.

Otherwise, get the square EFI coil. They don't care what voltage they're fed.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

In reply to this post by mat in tn

Yes, and it's a wiring hacked mess but I do have schematics for the '84 & '86 models. I can compare the two and hopefully come up with a correct wiring solution for this '86 even if it has to be a mix of both models.

I'm going to cut all zip ties and separate all the wiring so I can see what is what per the '86 schematic. Whatever this guy has the cylinder coil & distributor hacked into has burned up the coil & ignition points. When I figure out how to reduce my pictures using an Android you guys can see this engine bay mess.

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

These later trucks have a harness that will support DS-II or EFI.

'reduce' your pictures?
Use the 'big size' button at the bottom of the right hand column.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

There's a thread "Pre-emptive Fire"
that shows the resistor wire coiled up inside the dash, near the A pillar.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

In reply to this post by Gary Lewis

Oh yes, I understand. I've put aftermarket timing sets in the older Ford engines because of retarded cams. This '82 HD doesn't have an engine. I was saying that's the engine the truck had at one time. It still has the front axle, 4 speed transmission, transfer case, and HD rear differential. I'm working on an '86, I was just letting Jim know that I do have a HD truck which is the '82.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

In reply to this post by ArdWrknTrk

Okay Jim, that's something to keep in mind concerning the harness. Should I check anything in the "Float" column on the left hand side?

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

I don't usually bother with any of that.

But then again, I can't be bothered to re-orient my pictures either....

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

I understand, and thank you.

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

In reply to this post by Phillip G.

Phillip G. wrote

Whatever this guy has the cylinder coil & distributor hacked into has burned up the coil & ignition points.

If you have points you need a condenser, or they will eroded in no time

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

Yes, it's a points & condenser distributor. Just like before electronic ignition came put.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

Gary Lewis

Re: 1986 Ford F250 302 EFI Delete

Administrator

Good job on the pic!

The only time I use "float" is when I put two pics side by side. But that is tricky as you can't make the two pics larger than 95% of the screen size or things after the pics wind up between them.

Best not to "float".

Gary, AKA "Gary fellow": Profile

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

That harness has been hacked, spliced, and no telling where he's getting power & grounds from. I had to install a JPEG converter for the picture.

mat in tn

Re: 1986 Ford F250 302 EFI Delete

to make matters worse, you may also be finding crumbling wire insulation. don't over work the wires.

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

This post was updated on .

Oh, I've found that too. Lol. Which is why an older harness setup is looking good.

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

In reply to this post by Phillip G.

Phillip G. wrote

That harness has been hacked, spliced, and no telling where he's getting power & grounds from.

That's methed up!

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

viven44

Re: 1986 Ford F250 302 EFI Delete

This is exactly the reason why I was happy to use Painless wiring harness on "Big Red the Farm Truck". The farm trucks get jacked up always. Wiring on farm trucks.. almost a meme.

Vivek

- 'Big Blue 2WD' - 1984 F350 RWD 460/C6
- 1978 Bronco with the heart of a 1986 F250 Bullnose - under restoration
- "Bonded Bronco" -1985 Bronco - 302 4-speed fuel injected, Hibernating future project

Phillip G.

Re: 1986 Ford F250 302 EFI Delete

I'm going to look into that myself. Take it back many years. Does that Painless harness have a coil resistance wire in it?

ArdWrknTrk

Re: 1986 Ford F250 302 EFI Delete

Administrator

I think it comes with a ceramic ballast resistor, like a Mopar.

Jim,
Lil'Red is a '87 F250 HD, 4.10's, 1356 4x4, Zf-5, 3G, PMGR, Saginaw PS, desmogged with a Holley 80508 and Performer intake.
Too much other stuff to mention.

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