Ignition/Tuner/ECM/Fuel Injection Need advice on ignition issues? Questions about a tuner? Have questions about a EFI calibration or Fuel Injection? Tips on Engine Diagnostics, how to get codes, and what they mean. Find your answers here.

Converting over

Thread Tools
 
Search this Thread
 
Old Nov 25, 2020 | 04:05 AM
  #1  
tinymike66's Avatar
tinymike66
Thread Starter
|
Tourer
10 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2011
Posts: 373
Likes: 27
From: Ontario
Default Converting over

Hi folks.
so I'm converting over from MM EFI to carb.
Current:
2001 Ultra , 95ci kit , SE heads, SE 257 cams , SE cam plate & hydrolic tensioners, HV oil pump.
Rienhart 4" 2 into 1 exhaust.

I obtained a complete wiring harness, and ECM off a friend
I assume this would make this pretty much a plug & play with electrical.

I have the manifold, carb, choke cable and upper Mount with choke bracket.

Question is I don't think his old bike had cruise. Is there a way I can salvage my cruise or will I lose it converting over with the ECM and harness?

Thanks
Mike.
 
Reply
Old Nov 25, 2020 | 08:00 AM
  #2  
Ed Ramberger's Avatar
Ed Ramberger
Grand HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: May 2015
Posts: 3,584
Likes: 1,213
From: Then Wisconsin, now North Carolina
Default

Originally Posted by tinymike66
Hi folks.
so I'm converting over from MM EFI to carb.
Current:
2001 Ultra , 95ci kit , SE heads, SE 257 cams , SE cam plate & hydrolic tensioners, HV oil pump.
Rienhart 4" 2 into 1 exhaust.

I obtained a complete wiring harness, and ECM off a friend
I assume this would make this pretty much a plug & play with electrical.

I have the manifold, carb, choke cable and upper Mount with choke bracket.

Question is I don't think his old bike had cruise. Is there a way I can salvage my cruise or will I lose it converting over with the ECM and harness?

Thanks
Mike.
If the carburetor has the throttle cable bracket that accepts the cruise cable you should be fine. It looks like an extra cable groove with a nub the cable clips to. Be careful disconnecting it from the old intake as the plastic may be a little brittle by now.

The cruise module is not run through the ECM on that bike. Above you say you got a wiring harness and an ECM from a friend. The only thing that makes sense is that you got an ignition wiring harness and an Ignition Module from a friend.

If you don't have the carbureted ignition harness, you can get it from NAMZ.

What is wrong with your EFI?
 
Reply
Old Nov 25, 2020 | 09:26 AM
  #3  
tinymike66's Avatar
tinymike66
Thread Starter
|
Tourer
10 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2011
Posts: 373
Likes: 27
From: Ontario
Default

Originally Posted by Ed Ramberger
If the carburetor has the throttle cable bracket that accepts the cruise cable you should be fine. It looks like an extra cable groove with a nub the cable clips to. Be careful disconnecting it from the old intake as the plastic may be a little brittle by now.

The cruise module is not run through the ECM on that bike. Above you say you got a wiring harness and an ECM from a friend. The only thing that makes sense is that you got an ignition wiring harness and an Ignition Module from a friend.

If you don't have the carbureted ignition harness, you can get it from NAMZ.

What is wrong with your EFI?

No I got a wiring harness and actual ecm from a carbureted 01 Electra glide
I also have the spark plug box, coil

Right now efi is ok. But I'm planning on more mods and I prefer carb over efi.

MM is great when it works but I hear horror stories when it doesn't
 
Reply
Old Nov 25, 2020 | 12:23 PM
  #4  
Zanthamos's Avatar
Zanthamos
Outstanding HDF Member
Veteran: Air Force
Joined: Feb 2015
Posts: 2,414
Likes: 433
From: Arkansas
Default

Eds point with the ECM is that only EFI bikes have ECMs whereas carb bikes have Ignition Modules.
 
Reply
Old Nov 25, 2020 | 12:39 PM
  #5  
tinymike66's Avatar
tinymike66
Thread Starter
|
Tourer
10 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2011
Posts: 373
Likes: 27
From: Ontario
Default

Originally Posted by Zanthamos
Eds point with the ECM is that only EFI bikes have ECMs whereas carb bikes have Ignition Modules.
So then it must be that
So what I got was a full harness.
Ignition coil
Top engine mount
Choke cable
Manifold
CV Carburator
And a small rectangle box with two female pin plugs ...he said it's the computer
 
Reply
Old Nov 25, 2020 | 01:19 PM
  #6  
eighteight's Avatar
eighteight
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,804
Likes: 7,444
From: OH
Default

[QUOTE..he said it's the computer[/QUOTE]

Part # on that box will allow you to confirm or deny that it`s an ignition module for a carb bike.

( I mentioned in your other thread that that your proposed engine modifications "may" require a programmable ignition to alter the spark advance curves / Daytona Twin Tec is one such unit )
 
Reply
Old Nov 25, 2020 | 01:58 PM
  #7  
tinymike66's Avatar
tinymike66
Thread Starter
|
Tourer
10 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2011
Posts: 373
Likes: 27
From: Ontario
Default

Originally Posted by eighteight
[QUOTE..he said it's the computer
Part # on that box will allow you to confirm or deny that it`s an ignition module for a carb bike.

( I mentioned in your other thread that that your proposed engine modifications "may" require a programmable ignition to alter the spark advance curves / Daytona Twin Tec is one such unit )[/QUOTE]


I'll check that #

I think those mods might have to wait.
The heads I got don't seem to be compatible with a 98 or bigger build
There's a lot of research I need to do.

 
Reply
Old Nov 25, 2020 | 02:09 PM
  #8  
eighteight's Avatar
eighteight
Seasoned HDF Member
Joined: Oct 2019
Posts: 10,804
Likes: 7,444
From: OH
Default

Your S.E. heads can be compatible provided you select the right piston & head gasket

'Someone" made it work with your current 95" !
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Nov 25, 2020 | 06:37 PM
  #9  
tinymike66's Avatar
tinymike66
Thread Starter
|
Tourer
10 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2011
Posts: 373
Likes: 27
From: Ontario
Default

Originally Posted by eighteight
[QUOTE..he said it's the computer
Part # on that box will allow you to confirm or deny that it`s an ignition module for a carb bike.

( I mentioned in your other thread that that your proposed engine modifications "may" require a programmable ignition to alter the spark advance curves / Daytona Twin Tec is one such unit )[/QUOTE]


 
Reply
Old Nov 25, 2020 | 06:43 PM
  #10  
Ed Ramberger's Avatar
Ed Ramberger
Grand HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: May 2015
Posts: 3,584
Likes: 1,213
From: Then Wisconsin, now North Carolina
Default

That module is not for your combination, it is for a stock bike. The timing will be too advanced. Buy a Daytona Twin Tec.
 
Reply



All times are GMT -5. The time now is 05:57 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE