Member Contributer NVR2L8 Posted February 12, 2007 Member Contributer Share Posted February 12, 2007 I have an 05' w/ABS, and for about a year now I've done just about everything I can think of to eliminate a hot running surging problem. This symptom doesn't appear until the engine temp is over 200F, and is a lot more pronounced in 1st/2nd gear at the usual 4-5.5k rpm range, although it's still present but less pronounced in other gears at higher rpms. It's definitely a hot running problem...which pretty much means it runs badly during the summer months here in SoCal. Here is a little history... When I first got the bike, within a month or so I removed the flapper valve, PAIR system, and sync'd the starter valves. I also installed a set of Staintunes, and all tubing for the flapper and PAIR was yanked and capped off, and as far as I can tell I don't have a vacuum leak. Later on I added a PCIII USB and O2 Eliminators to help smooth out low rpm snatchiness, and when that helped but didn't eliminate the on/off transition, I also tried the Turbo City fuel pressure regulator. Never could get a working combination that totally got rid of the problem, so I decided to just live with it. When my bike was apart this past September after a minor low-side, I went back to the stock fuel pressure regulator, and decided to replace the internal fuel filter and sparkplugs in case either might be a contributing factor to this problem. I also sent the PCIII back to Dynojet for testing, and even though they didn't find anything wrong with it, they sent me a brand new one. Also tested the O2 Eliminators...they weren't exactly 300 ohms if I remember correctly...just a little less at 290 ohms or so. Well within a 5% tolerance though... This past weekend I loaded a zero PCIII map just to see what would happen, and once the bike got hot it surged even worse than before. It's tough to explain the surging, but it's as if the engine is stumbling...either from a severe lack of air or fuel. Anyway, I'm about to give up and sell this thing as I can't believe I'm supposed to deal with a bike that runs like this. Any help comments would be appreciated... Quote Link to comment Share on other sites More sharing options...
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