Backfiring after high speeds?
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From: Road Glidin' Don on 28 Oct 2009 12:33 On Oct 27, 10:13 pm, Billy Roach <ah123ro...(a)gmail.com> wrote: > On Oct 27, 11:54 pm, Razor Buzz <n...(a)razorbuzz.net> wrote: > > > > > > > 2005 HD Sporster, Carb'd not fuel injection. > > > I can ride around town all day with absolutely no problems. I can get on > > the highway, and she runs fine... until I get off. After going over 55mph > > and returning to low speeds, I begin to get a lot of backfires. As soon > > as I stop at a redlight/stopsign, the backfires continue and I can't get > > any acceleration over ~5mph. After turning the bike off and letting it > > cool down, I can start back up and ride all over again - unless I bring it > > back up to highway speeds. > > > I've replaced the sparkplugs, completely changed gas, cleaned the carb > > (there was no debris in the bowl underneath), cleared all lines. > > > Anybody have ideas on what could be the cause, and hopefully a solution? > > > Thanks, > > Greg > > Do 2005s still have a VOES? Just grasping here, but I'd > check that if you have one. The test procedure is in the manual. And, if he doesn't have the manual, there's this page from my site that might help: http://www.xidos.ca/Technical/HarleySpecsStandardProcedures/TroubleCodes/VDOIgnitionCarburatedFLTs/tabid/88/Default.aspx
From: Razor Buzz on 28 Oct 2009 19:18 > And, if he doesn't have the manual, there's this page from my site that > might help: > > http://www.xidos.ca/Technical/HarleySpecsStandardProcedures/ TroubleCodes/VDOIgnitionCarburatedFLTs/tabid/88/Default.aspx Indeed! P0374 and P0502. Crank Position Sensor and Vehicle Speed Sensor High/Open. I have a CPS on it's way to me as of now, going to replace that. Some searching has shown that replacing the CPS will usually correct the VSS issue also. Thoughts?
From: Billy Roach on 28 Oct 2009 21:04 On Oct 28, 7:18 pm, Razor Buzz <n...(a)razorbuzz.net> wrote: > > And, if he doesn't have the manual, there's this page from my site that > > might help: > > >http://www.xidos.ca/Technical/HarleySpecsStandardProcedures/ > > TroubleCodes/VDOIgnitionCarburatedFLTs/tabid/88/Default.aspx > > Indeed! P0374 and P0502. Crank Position Sensor and Vehicle Speed > Sensor High/Open. I have a CPS on it's way to me as of now, going to > replace that. Some searching has shown that replacing the CPS will > usually correct the VSS issue also. > > Thoughts? I think you should read the FAQs. www.rmhfaq.com
From: Razor Buzz on 29 Oct 2009 08:24 On Wed, 28 Oct 2009 18:04:34 -0700, Billy Roach wrote: > I think you should read the FAQs. > > www.rmhfaq.com You're the second person to say that, and yet I have read them. I must be missing something in there that ya'll are trying to point out. Doing my own research is the only one that comes to mind, but I have done quite a bit. Including using the repair manual to try and diagnose/correct. Last time I checked codes (about a month ago) they were clear and reported "none". Additional online research has shown that many others have had the same issue with the crank position sensor and not thrown a code until the sensor was completely blotto, despite the problem persisting for quite some time prior. The repair manual also doesn't mention a VSS correction occuring by replacing the CPS, giving the impression that they're completely unrelated. But again, online research has shown that replacing the CPS has corrected the VSS in some cases also - I was looking for an additional opinion on the why/why not that may work, as the discussions I've found aren't entirely conclusive. That being said - if I am indeed missing some other part of the FAQ that is germane to this, please advise and I will read again. -Greg
From: ChainsawPaul on 29 Oct 2009 09:24
On Oct 29, 5:24 am, Razor Buzz <n...(a)razorbuzz.net> wrote: > On Wed, 28 Oct 2009 18:04:34 -0700, Billy Roach wrote: > > I think you should read the FAQs. > > >www.rmhfaq.com > > > That being said - if I am indeed missing some other part of the FAQ that > is germane to this, please advise and I will read again. > > -Greg http://www.rmhfaq.com/drink.htm |