Found! IAC or TPS for 2.8

[natertot]

I believe this is the solution to my code 13.

 

[franklin2]

You haven't found the above on your engine correct? That is because your engine is carbed, and instead of a idle air control solenoid, you have dc motor controlled throttle. You have a DC motor that screws in and out to control the idle speed. If you simply have this mis-adjusted, and the dc motor cannot unwind enough to drop the idle speed of the engine, it will set this code.

I would experiment with the setting on the motor on the carb. Turn it back to lower the idle speed.

 

[natertot]

Yes, I have the

You haven't found the above on your engine correct? That is because your engine is carbed, and instead of a idle air control solenoid, you have dc motor controlled throttle. You have a DC motor that screws in and out to control the idle speed. If you simply have this mis-adjusted, and the dc motor cannot unwind enough to drop the idle speed of the engine, it will set this code.

I would experiment with the setting on the motor on the carb. Turn it back to lower the idle speed.

Yes, I have a carbed 2.8. I see this called IAC on several parts sites but it’s out of stock everywhere. To the best of my knowledge I had thought this was the throttle position sensor. I’ve read in a few places that the Cologne V6 had an IAC even though it was carbed because Ford was making a last ditch effort to make the carb viable in the mid 80s. That was confusing to me, so thanks for confirming it’s not true.

I wasn’t able to find any info on that DC motor in my Chilton but I’ll check Haynes when I get home. Thank you so much!

 

[Brain75]

do you have a part number - guessing since it is out of stock, any part number as long as you know the mfg too.

 

[Brain75]

I realized your photo is rock auto and went there first.. for those hunting:
the details of that part:

More Information for WALKER PRODUCTS 2201000

and right there the interchange:
Walker 2201000
OR
E3TZ9D825A, E3TZ9N825A, E3TZ9N825B, E47F9N825AB, E4ZF9N825AA, E4ZZ9N825A, E7SF9N825AA, E7SZ9N825A
(presumably FORD part numbers)

so I just googled one of em - the last one
looks like it lists as being for T-birds up till 87 and F series with 300 straight six as well... going the 300 straight 6 gave me this

1986 FORD F-150 4.9L 300cid L6 Idle Air Control (IAC) Valve | Shop Now at RockAuto

Fuel & Air Parts and More for Your 1986 FORD F-150 at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.

www.rockauto.com

Standard Motor Products AC20T
United Motor Products IAC9
Standard Motor Products AC20 (no T suffix)
and
Walker 2201000

well if all those are acceptable, then 3 of the 4 are not out of stock - could try one of those.
caveat - the 3 look to have a flange on the side to mount to the intake tube/throttle body/something - different than yours.
OR
Take your old part into a good brick and mortar (I like O-Reilly) with all those part numbers.Take your VIN too since they will want to start with the VIN....
and have em pull which ever one they have on the shelf in your brand/price range and compare that there isn't some little extra flange or some other reason why Oreilly's house brand or Standard or United didn't list for Bronco ii.

I'm seeing places where 1985 is the very very last year in the drop down now (fordpartscatalog.com) - so there just might be database issues with the online places basically dropping anything the day it hits 40 years.

 

[franklin2]

Yes, I have the


Yes, I have a carbed 2.8. I see this called IAC on several parts sites but it’s out of stock everywhere. To the best of my knowledge I had thought this was the throttle position sensor. I’ve read in a few places that the Cologne V6 had an IAC even though it was carbed because Ford was making a last ditch effort to make the carb viable in the mid 80s. That was confusing to me, so thanks for confirming it’s not true.

I wasn’t able to find any info on that DC motor in my Chilton but I’ll check Haynes when I get home. Thank you so much!

I think you will find replacing parts may not fix it. It may be an adjustment problem. It has a complex idle adjustment procedure. I have a scan of the procedure below. You can see they call it a "idle speed control". If you buy a new one, you will still have to go through this procedure to get it adjusted.

 

[natertot]

I realized your photo is rock auto and went there first.. for those hunting:
the details of that part:

More Information for WALKER PRODUCTS 2201000

and right there the interchange:
Walker 2201000
OR
E3TZ9D825A, E3TZ9N825A, E3TZ9N825B, E47F9N825AB, E4ZF9N825AA, E4ZZ9N825A, E7SF9N825AA, E7SZ9N825A
(presumably FORD part numbers)

so I just googled one of em - the last one
looks like it lists as being for T-birds up till 87 and F series with 300 straight six as well... going the 300 straight 6 gave me this

1986 FORD F-150 4.9L 300cid L6 Idle Air Control (IAC) Valve | Shop Now at RockAuto

Fuel & Air Parts and More for Your 1986 FORD F-150 at Reliably Low Prices. Fast Online Catalog. DIY-Easy. Your Choice of Quality. Full Manufacturer Warranty.

www.rockauto.com

Standard Motor Products AC20T
United Motor Products IAC9
Standard Motor Products AC20 (no T suffix)
and
Walker 2201000

well if all those are acceptable, then 3 of the 4 are not out of stock - could try one of those.
caveat - the 3 look to have a flange on the side to mount to the intake tube/throttle body/something - different than yours.
OR
Take your old part into a good brick and mortar (I like O-Reilly) with all those part numbers.Take your VIN too since they will want to start with the VIN....
and have em pull which ever one they have on the shelf in your brand/price range and compare that there isn't some little extra flange or some other reason why Oreilly's house brand or Standard or United didn't list for Bronco ii.

I'm seeing places where 1985 is the very very last year in the drop down now (fordpartscatalog.com) - so there just might be database issues with the online places basically dropping anything the day it hits 40 years.

Thanks for all this! Those 3 parts that are in stock on the link you sent look like the IAC for the 2.9 engine, not the carbed 2.8. I've been having trouble finding out if the 2.8 even did have an IAC, I don't see one on my vehicle, and the rockauto part I found that was labeled as an IAC is actually a throttle position sensor (I'm confident now because when I unplug mine I get a code 23, which is TPS out of range). Not sure why it's listed as an IAC, but I'm hoping that I can fix my code by adjusting the idle on the carb itself. The code refers to "idle speed control" - thank you for doing all of that research, I've been having a lot of trouble because the previous owner rebuilt the engine and ripped out a bunch of things and introduced parts from other model years. I will definitely take this in to a brick and mortar with my VIN and everything as well!

Interesting on 1985 being the last model year on a lot of sites, I saw the same - hopefully all the parts for my car don't drop off the face of the earth in 2026 haha. I'm marking this found but not deleting it so that others can have some useful info. Thank you!

 

[natertot]

I think you will find replacing parts may not fix it. It may be an adjustment problem. It has a complex idle adjustment procedure. I have a scan of the procedure below. You can see they call it a "idle speed control". If you buy a new one, you will still have to go through this procedure to get it adjusted.

I believe this is the key - I've been going in circles finding a lot of conflicting info, but since it's a carbed engine I doubt it has an IAC even though I keep seeing that. I'm assuming its a DC motor and needs to be adjusted. It's fantastic that you found that though! Amazing and infinitely helpful! I'll give it a shot when I'm back at home.

Also, where did you find this? It seems like that book/manual could be useful for other issues and it refers to some figures I'd like to see also

 

[Brain75]

assuming some PO ripped it out, is there a plug dangling to go to one? Ford didn't spend an extra nickle on wiring, it wouldn't be routed 3 feet away and tucked somewhere it would be within 6" of where it should terminate.

 

[franklin2]

I believe this is the key - I've been going in circles finding a lot of conflicting info, but since it's a carbed engine I doubt it has an IAC even though I keep seeing that. I'm assuming its a DC motor and needs to be adjusted. It's fantastic that you found that though! Amazing and infinitely helpful! I'll give it a shot when I'm back at home.

Also, where did you find this? It seems like that book/manual could be useful for other issues and it refers to some figures I'd like to see also

I can't remember where I got it, I have several manuals laying around.

I had a 2.8, was all original. But it would not run correctly. It would suddenly have a fast idle sometimes, I never could pinpoint it. So I took this system off, bought a regular carb from Amazon and bought a rebuilt distributor for a 1978 Mustang II with a 2.8. This distributor is the conventional style that does not need a computer.

The 2.8 in the 1970's was not computer control. So you can convert over. Problem is, everyone was converting, and the supply of the 1970's style distributor for the 2.8 dried up. I haven't looked lately, maybe you could find one if you wanted to go this route. There are some threads on here about people looking for a conventional distributor for the 2.8, and I believe a different style is being made in England that you might be able to source.

As you said, this system is old and can be difficult to work on. Some parts can be hard to find. It did work well when it was new.

 

[alwaysFlOoReD]

AFAIK there is a supplier in Britain with new distributors. There is a thread with his info in it somewhere, fairly recent.

This isn't the one I was thinking but may be legit;

Ford Duraspark – Performance Distributors

performancedistributors.com

 

[franklin2]

AFAIK there is a supplier in Britain with new distributors. There is a thread with his info in it somewhere, fairly recent.

This isn't the one I was thinking but may be legit;

Ford Duraspark – Performance Distributors

performancedistributors.com

I think this is the one. Looking at the lead time for the one above, I am wondering if they can even get it.

Ford Cologne V6 Bosch Type Distributor

Ford Cologne V6 Bosch Type Distributor from Powerspark| Electronic & Points Classic Car Distributors | from Powerspark Ignition | UK Supplier

simonbbc.com

 

[franklin2]

I think this is the one. Looking at the lead time for the one above, I am wondering if they can even get it.

Ford Cologne V6 Bosch Type Distributor

Ford Cologne V6 Bosch Type Distributor from Powerspark| Electronic & Points Classic Car Distributors | from Powerspark Ignition | UK Supplier

simonbbc.com

Apparently they ran the 2.8 engine overseas for a longer period and have more of them still on the road over there.

 

[natertot]

I can't remember where I got it, I have several manuals laying around.

I had a 2.8, was all original. But it would not run correctly. It would suddenly have a fast idle sometimes, I never could pinpoint it. So I took this system off, bought a regular carb from Amazon and bought a rebuilt distributor for a 1978 Mustang II with a 2.8. This distributor is the conventional style that does not need a computer.

The 2.8 in the 1970's was not computer control. So you can convert over. Problem is, everyone was converting, and the supply of the 1970's style distributor for the 2.8 dried up. I haven't looked lately, maybe you could find one if you wanted to go this route. There are some threads on here about people looking for a conventional distributor for the 2.8, and I believe a different style is being made in England that you might be able to source.

As you said, this system is old and can be difficult to work on. Some parts can be hard to find. It did work well when it was new.

I do still have to pass emissions and I think with the duraspark conversion you get codes that prevent that, right? I may be moving to a new state soon and would happily make the swap as long as I can register it like that haha. Thank you for everything, I'll try to track down that manual and adjust the carb tonight!

 

[bobbywalter]

Amazon.com

FORD CAPRI 2.3, 2.6, 2.8 V6 COLOGNE BOSCH TYPE ELECTRONIC IGNITION DISTRIBUTOR | eBay

For your Bosch Cologne distributor. FORD COLOGNE V6. FORD CAPRI 2.3 V6, 2.6 V6, 2.6RS V6, 2.8 V6. RELIANT SCIMITAR 2.8 V6(79 on)COLOGNE BOSCH TYPE ELECTRONIC IGNITION DISTRIBUTOR. TVR 280i, TVR TASMIN 2.8 V6 COLOGNE BOSCH TYPE ELECTRONIC IGNITION DISTRIBUTOR.

www.ebay.com

Ford Cologne V6 Distributor with Powerspark Electronic Ignition Capri Cortina | eBay

Built to original specification and improved with the addition of Powerspark™ electronic ignition and cast from a one piece mould instead of the original two piece moulding. Powerspark Electronic Ignition Kit - This kit (pre-fitted in this distributor) replaces the standard points and condenser...

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