ecm question
Thread Starter
|
Road Captain
Joined: Jun 2007
Posts: 676
Likes: 0
From: harrodsburg
ecm question
is there a upgraded version of the stock ecm. can a stock ecm go bad..im still trouble shooting a problem and im trying to eleminate a possible bad ecm..for those that have been reading the "map sensor" thread i started, i have changed the IAC and that didnt help anything.. i had the fuel presure checked and its ok. now im back to wondering if a got a bad ecm..it had a 1550 stage 1 download but i had it reflashed back to a stock ecm. that was done at the advice from jamie at fuelmoto...
Club Member
Joined: Feb 2007
Posts: 1,678
Likes: 3
Do you happen to have any of those braided sparkplug cables? I had a set of those arc against the engine and give me trouble. If you have upgraded yours, it might be worth a couple of minutes to install the stock ones and see if you still have the issue.
Thread Starter
|
Road Captain
Joined: Jun 2007
Posts: 676
Likes: 0
From: harrodsburg
not sure how to Duplicate the thread but i can kinda start over..bike starts when cold but if i shut the bike off while cold it will not start back up unless i open the throttle all the way.. if i start it up and let it run awhile then it will start right up every time.it also is getting very bad mpg.. i do notice that i am getting black smoke from the pipes when i have to open the throttle all the way to get it started. it used to pop on decel even with a map from jamie but now it dont pop on decel at all whether i use the powercommander or unhook the powercommander.. it will flood every time if i start it while cold and shut it back off then start it again. i dont get any trouble codes and the check engine light dont come on . right now i got the powercommander off the bike and pluged the ecm back in and before it would pop on decel like crazy but not now and with shortshots and se breather ,you would think it would be very lean but it dont seem to act like a lean running bike..it seems rich. it just dont have the pep it used to have and i cant figure what wronge with it..the dealer tells me they have never seen a bike do this and im not wanting to pay them by the hour to just stand over the bike and say "hell i dont know"..lol..i can do that here for free..
Last edited by hddave2; Aug 15, 2008 at 05:04 PM.
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,609
Likes: 1
From: Indy area
Sorry I haven't the time right now to postulate further with you. I will. What I'd meant was, you had started a thread and were getting "help" there. Now you have more information which really belongs as part of that old thread so that it can continue. Cut and paste your first post in this thread to a post at the tail of the old one. Let it continue. Somebody may come along later with the same problem, excitedly read through that thread, and figure you must've died and/or transfigured to the next lifeform in line for us before you found an answer to your and their problem. How will they know to look in a new thread for the continuation?
I want to try to help you get to the bottom of this, but I'd rather do it in the original thread.
I want to try to help you get to the bottom of this, but I'd rather do it in the original thread.
Club Member
Joined: Feb 2007
Posts: 1,678
Likes: 3
Trending Topics
Thread Starter
|
Road Captain
Joined: Jun 2007
Posts: 676
Likes: 0
From: harrodsburg
they are hd se wires ..they were installed new about 2 weeks ago..i was hopeing that would fix the prob. but it didnt..
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Thread Starter
|
Road Captain
Joined: Jun 2007
Posts: 676
Likes: 0
From: harrodsburg
Sorry I haven't the time right now to postulate further with you. I will. What I'd meant was, you had started a thread and were getting "help" there. Now you have more information which really belongs as part of that old thread so that it can continue. Cut and paste your first post in this thread to a post at the tail of the old one. Let it continue. Somebody may come along later with the same problem, excitedly read through that thread, and figure you must've died and/or transfigured to the next lifeform in line for us before you found an answer to your and their problem. How will they know to look in a new thread for the continuation?
I want to try to help you get to the bottom of this, but I'd rather do it in the original thread.
I want to try to help you get to the bottom of this, but I'd rather do it in the original thread.
Road Warrior
Joined: Mar 2008
Posts: 1,691
Likes: 3
It certainly seems rich. If you've been driving it then it would seem you ought to be seeing some brown, glassy deposits on the spark plugs. It rather begs the question of how you're not getting DTC's. If you're running so rich as to lose power then it seems the ecm ought to say something is wrong. If you're actually burning the fuel then the O2 sensors should tell the ecm something is wrong.
Replacing the ecm seems a bit expensive when a reasonable assumption is that it is working. Computers tend to be all or nothing. It does a self-check at powerup, it has all the conditions it checks during operation that would set DTC codes and the general tendancy of cpu's to work correctly or not at all. I would suggest before you do that to get the electronic diagnosis manual. Someone said it has procedures for checking all of the sensors. The manual would be a lot cheaper than replacing stuff to see what happens.
Replacing the ecm seems a bit expensive when a reasonable assumption is that it is working. Computers tend to be all or nothing. It does a self-check at powerup, it has all the conditions it checks during operation that would set DTC codes and the general tendancy of cpu's to work correctly or not at all. I would suggest before you do that to get the electronic diagnosis manual. Someone said it has procedures for checking all of the sensors. The manual would be a lot cheaper than replacing stuff to see what happens.