Re-wiring 1986 EFI Questions

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Re-wiring 1986 EFI Questions

ReneH
This post was updated on .
So, I'm back starting a new topic.

I will do a documentation of the re-wiring process. So maybe this will also help others who have to do the same. In parallel I also have to ask about some unknown things or devices.

I'm starting at the very end of the harness on the passenger side. And also here is my first question...for what are this vacuum relays used?


So, here it is...harness from hell!



I also have found some unknown connectors.


This one was inside the car, directly at the ECU connector.

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Re: Re-wiring 1986 EFI Questions

86 1/2 Brutus
I do really think making the new harness is going to solve your problem.  From the pic i see, there are many very badly cracked insulation within wire kinks.  I have a good feeling about this.  Vacuum relay?, do you mean vacuum solenoid?  If your truck has those horrible neoprene vacuum lines like mine had, you are going to want to change all of them out immediately.  They crack and crumble.  they are inside and out.  We replaced every single one of them which were bad.  If you have them, do yourself a favor and save many many headaches and change them out as well
Nick and George
1986 1/2  F150 XLT Lariat 4X2  300 Six  - C6 - 3:08 in a 8.8 -  Fully Loaded - 8 Foot Box
Owned since new
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Re: Re-wiring 1986 EFI Questions

85lebaront2
Administrator
In reply to this post by ReneH
The solenoids are EGR Vac and Vent and two Thermactor (air pump) controls. The other item in that area is the MAP sensor (Manifold Absolute Pressure).

Unfortunately I can't enlarge the harness picture, but from what I can see it doesn't look pretty, probably exactly what I said originally.

Small plug on inside near the EEC was probably what Ford called an "inferred mileage sensor" It was used to turn on a "service emissions light" If you are going to rewire it. and are using a newer EEC, I highly suggest using that upper left bulb location for an MIL light (lets you know there is a problem). The EEC 60 pin plug can be disassembled and relocated.

The injectors are Bosch units so you should be able to get connectors for them easily, sensor connectors will probably be more difficult in Europe, it's hard enough here.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: Re-wiring 1986 EFI Questions

ReneH
Ok  so I can remove the solenoids.
I haven't installed the whole EGR system.

Ok, sobi will check to install this bulb for signaling.

I will use the 1989 351W ECU. And this brings me to my next question...can I buy new crimp contacts for the ECU connector?
If this is possible, I can do a better re-wiring.

I also have the problem that I won't get out my ECU. I already have removed the bracket near the connector...but it seem that there is another screw or holder on the top for that I have to disassemble the whole dashboard...

Ok, thanks for the information about the sensors connectors...I will search for them.
Injector connectors are already new.
If I won't find the sensors connectors, I will maybe build my own...
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Re: Re-wiring 1986 EFI Questions

ReneH
In reply to this post by 86 1/2 Brutus
I already have changed all remaining vacuum lines with high quality silicone lines...only some of the hard plastic ones are still there...
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Re: Re-wiring 1986 EFI Questions

85lebaront2
Administrator
In reply to this post by ReneH
I believe there is a source for them, let me do some looking. If you are using a 1989 ECU, the EGR control is different, the control valve is a 3 port, with the center one going to the EGR valve, outer port (furthest from the solenoid coil) is vacuum, inner port is vent.

If there were an easy (and inexpensive) way to get them to you, I have lots of the sensor connectors.

Here is a link (Europe) for a connector kit for the ECU: https://picclick.de/Ford%C2%A060-Pin-OEM%C2%A0EEC-IV-Computer-ECM-PCM-Connector-E4LB-14489-266087444785.html?refresh=1
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: Re-wiring 1986 EFI Questions

ReneH
Hey Bill. Thanks for the link of the ECU connector! So I can directly set my cable to the connector without additional linking of every wire.

About the EGR: I have removed all components. So I also can remove this solenoids completely.


Are there any other differences regarding the pinning of 1986 and 1989 ECU?
The pinout schematic here on this site is the one for the 1986, as far as I know...

About the sensor connectors...ok. thanks for this. I will check what prices I get for shipping and come back to you.
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Re: Re-wiring 1986 EFI Questions

85lebaront2
Administrator
Rene, here is where the pinouts for all Ford EEC-III, EEC-IV and EEC-V for our trucks (EEC-V is on there as Gary and I both have 460 (7.5L) engines converted from carbureted the MAF/SEFI (mass air flow/sequential electronic fuel injection): https://www.garysgaragemahal.com/electronic-engine-control-eec.html

Go there, then on the pinouts tab (link should take you to Electronic Engine Control) the pinouts are an Excel spreadsheet, but if you want a copy you can print out, email me and I will send you the file. You need to look at the bottom tabs to be sure you are on EEC-IV. This will give you the original pinouts from your 1986 and the ones for the 1989. BTW, EEV-V uses a 104 pin connector vs the 60 pin of the EEV-IV.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: Re-wiring 1986 EFI Questions

Rembrant
In reply to this post by ReneH
There is a company making a new Bullnose "complete" harness, but holy smokes it's expensive...

https://www.americanautowire.com/shop/classic-update-kit-1980-86-ford-truck-bronco

1952 Mercury M-1 Pickup '96 5.0/4R70W swap project...
1984 F150 4X2 Flareside. Mild 302 w/ 5spd. Sold.
1980 F150 4X4 Flareside. 300i6 w/ 5spd. Sold in 2021.
1980 F100 4X2 Flareside. 351w/2bbl w/NP435. Sold in 1995

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Re: Re-wiring 1986 EFI Questions

Gary Lewis
Administrator
Yes, that is expensive.  But it might be worth it if you were building a truck from scratch.
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 in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI

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Re: Re-wiring 1986 EFI Questions

85lebaront2
Administrator
In reply to this post by Rembrant
That doesn't seem to include the engine harness, so wouldn't be a lot of help on the EFI issues.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: Re-wiring 1986 EFI Questions

ReneH
This post was updated on .
In reply to this post by Rembrant
Ok, thanks for this link. But every harness made for automotive use I have ever seen was junk. Only single isolated wires with bad quality isolation materials.

That's the reason I do wiring at all my cars on my own. It's a lot of work, but it's worth it. I also eliminate all connectors, if possible, cause they are the next weak part in the electrical system. I also set higher wire gauges for the power lines to the distributor points I build. And the last important thing I do is to route ground to every endpoint within the cable. If the device gets ground from its own case, I connect the case also directly.

Here are some photos of my 1986 CJ7 wiring:







And this is the tiny cable I will use for Broncos ECU connection inside the engine bay:


PIP, SPOUT and IGN GND will get their own, shield cable. Also power lines will be routed within an extra cable directly from the battery.

Fusible links will replaced by automotive fuses in a centralized, watertight box...
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Re: Re-wiring 1986 EFI Questions

85lebaront2
Administrator
Rene, I agree with you. I helped a friend doing a restomod 1955 Dodge pickup, he kept everything pretty much Chrysler except front suspension and rear axle. He bought a Painless wiring kit and steering column, great if you are doing a Chevy, not so good on the Dodge.

I completely rewired my 1986 F350, using later Ford wiring and extending the frame portion as mine is a crew cab and the rear harness is 35" or roughly 20% longer. Underhood, I used a 1996 Power Distribution Center eliminating the fusible links. I don't mind connectors as long as they are weatherproof and definitely prefer them to working on something with continuous harnesses requiring each component to be individually disconnected.

I have done the same on my 1986 Chrysler Lebaron, updated a PDC and inside fuse panel to a newer style.
Bill AKA "LOBO" Profile

"Getting old is inevitable, growing up is optional" Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator Wife's 2011 Flex Limited Daily Driver 2009 Flex Limited with factory tow package Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413

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Re: Re-wiring 1986 EFI Questions

ReneH
This post was updated on .
Yes, that's the only way to get it long lasting.

Today I have bought the connector for the ECU, of which you have had sent the link to me.
I also have ordered some power Schottky-Diodes and a 50W power resistor with 22kOhms for the ignition distributor.

My solution instead of using connectors are  my distributor boxes. In most cases you have much bigger problems, if you have to remove a cable. So I my case I may have some more work to remove a bit longer cable, not split by a connector. On the other hand I have no contact resistance and no possibility for water to enter...every seal has it's end. Another thing is that replacing a cable is very easy, cause all are covered by industrial norms and don't have any spooky connectors that maybe are hard to get after some decades.
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Re: Re-wiring 1986 EFI Questions

ReneH
Ok, I'll start on Saturday. Now I still have the problem that I can't get out the old ECU.
I have removed the bracket near the connector, but it seem that the unit is fixed on another position upside...does somebody hava a hint for me?
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Re: Re-wiring 1986 EFI Questions

Gary Lewis
Administrator
The bracket should look like these, and the ECU is held in by the arm at the top that just squeezes the ECU, and the tab at the lower right that locks it in.  The tab is held with one screw and when it comes out the ECU should be able to slide straight down.


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 in front & 10.25 Spicer/Trutrac in back, & EEC-V MAF/SEFI