2008 Road Glide Backfiring/Sputtering Problem, HELP!!!
off topic, but make sure you use anti-seize paste on your sparkplug threads, everytime you service them.
and you can see alot of water has been pooling at your rear plug- be careful if using a pressure washer, it'll forcewater into places where it can't drain out.
also, after washing is a good time to run the motor to help dry it out.
how old is the gas in the bike?
can you top off with known good gas ( name brand, low ethanol/ oxygenating agent content).
Mike
and you can see alot of water has been pooling at your rear plug- be careful if using a pressure washer, it'll forcewater into places where it can't drain out.
also, after washing is a good time to run the motor to help dry it out.
how old is the gas in the bike?
can you top off with known good gas ( name brand, low ethanol/ oxygenating agent content).
Mike
I second this this. Mine died completely at 13K miles, and this was the culprit. Despite being out of warranty, Harley to their credit covered it.
Wow, what a response! Thanks to everyone who replied. I appreciate the feedback, immensely. Ok.... starting with the fuel canister. Yes, I took it to my dealer over a year ago when the fuel canister recall first came about. The Harley dealer determined that my ride was built with the later model fuel canister, so I was good to go. The fuel regulator and canister, I thought was all one part. Faast Ed is the big winner of the mystery. The Vance And Hines "installed" Fuelpak was the culprit. Regardless of what the photos show, the alignment of the plugs was ok. The Fuelpak developed a small amount of dark green colored crusty corrosion in the corner of the plastic plug, brought on by what I assume was a reaction of a few of the brass pins and some water build up. The side of the Fuelpak plug was also cracked. Vance And Hines installed it flat under the seat, I can only assume cracked from the pressure of the seat and riding stress on the plug. I usually wrap the entire electrical wiring stuff in a plastic bag before I wash it but I guess some still go through. The kick in the a** is I had a small packet of Dielectric grease in my tool box and never though of using it.
Never again! As far as the spark plugs, as I mentioned earlier, I use a MasterBlaster air dryer. It does a damn good job on drying the bike bone dry but I have a set of Harley finned headbolt covers that trap water and make it hard to see in those spaces. That is why the spark plugs look the way they do. I will pay extra attention to that area from now on when I wash it. I also live on A1A right on the beach, so it catches a lot of salty air too(see the spots on the front plugs metal). The tops of the spark plugs too is also a good place for the grease. One thing I should mention, because of the corrosion, it stuck to the pins so much so that it broke off one of the pins on the Harley ECM when I was taking it off, even though I was very careful while doing it.
I should also mention as a warning to others, I called Harleys corporate office to see if I could get the ECM repaired or replaced at 'a possible' discounted price. A new Harley ECM cost almost $400.00. They said that because I took the plug off myself, they would not be able to pick up or discount the cost of replacing or fixing the ECM also because it was "past the warranty". They said to take it to my local dealer and they would determine if it could be repaired or replaced but that I was most likely going to have to pay full price, including the cost to have them look it over. I explained I had no choice at the time, I had to in order to get it to work enough so I could get the bike home safely. Other wise I would have been stranded with no way to get home. They did not care.
So..... Its running ok now, it seems to be running the same way as it did before this all happened. I am wondering though if that one broken pin is making any difference on the bikes performance but I'm leaving well enough alone! I think the source of this entire situation might originate from the fact I had to temporarily remove the Harley riding bell from the bike so could wash it. The Gremlins may have got it! Either that or Tazzrider suggests, it may be a 'Christine' thing. Is 5300 considered not alot of miles for a two year old bike? Thanks again to everyone here.
Last edited by Dispatch; Jan 4, 2011 at 09:17 PM. Reason: Additions.
After a bit of riding since installing a new Fuelpak, it has not behaved the same. I had no idea Fuelpaks could become defective, being it was so new. Oh well. Anyone who experiences this may want to see if same issues exist for them.
I am wondering though if that one broken pin is making any difference on the bikes performance but I'm leaving well enough alone!
There are some pins that are not even used on it. Hopefully the broken one is one of them. If you can post which pin it is, maybe somebody can tell you what it goes to?
(Not like it even matters at this point - your bike is running good).
Very glad to hear that the problem is solved!
You avoided buying a new ECM? Fantastic!
There are some pins that are not even used on it. Hopefully the broken one is one of them. If you can post which pin it is, maybe somebody can tell you what it goes to?
(Not like it even matters at this point - your bike is running good).
Very glad to hear that the problem is solved!
There are some pins that are not even used on it. Hopefully the broken one is one of them. If you can post which pin it is, maybe somebody can tell you what it goes to?
(Not like it even matters at this point - your bike is running good).
Very glad to hear that the problem is solved!
Here is a photo of my Harley ECM, on the bottom row, notice the second from last pin on the right is broken.

Here is a photo of the crack on the (Defective), Fuelpak I exchanged.

This is a packet of Dielectric grease(available in any AutoZone -or- Pep Boys), I should have used from the start!
Most recent diagram I have handy is for 05, which would have been check engine light.
Does your check engine light work when turning on the key?
I was worried when I first started reading your results post, that you had to replace the ecm. Sure was pleased to find out different.
Likely nothing to worry about if that puppy is running.
Does your check engine light work when turning on the key?
I was worried when I first started reading your results post, that you had to replace the ecm. Sure was pleased to find out different.
Likely nothing to worry about if that puppy is running.
Most recent diagram I have handy is for 05, which would have been check engine light.
Does your check engine light work when turning on the key?
I was worried when I first started reading your results post, that you had to replace the ecm. Sure was pleased to find out different.
Likely nothing to worry about if that puppy is running.
Does your check engine light work when turning on the key?
I was worried when I first started reading your results post, that you had to replace the ecm. Sure was pleased to find out different.
Likely nothing to worry about if that puppy is running.
I know it's frustrating that HD won't cut you a deal. I can kind of understand their position because it looks like the fp was a contributer to the issue and maybe even the root cause of the pin failure.






