Q: I have an 01 FLHTCUI with over 40,000 miles with an issue of starting and stalling. It always starts easily when cold and idles well, but after a few minutes, if I’m idling awhile to get out of my driveway, the idle will fall and the engine will threaten to stall. If it does stall it’s hard to get started again, I have to give it a little throttle to get it to start and stay running. After I’ve been riding for awhile and the engine warms up it will idle stronger and is usually fine, but once in awhile when I start from a stop sign or light it will stall and I’ll have to give it some throttle to start and idle up. Of course it never does it when the dealer has it. I also find that in warm weather it’s better to let the engine cool for 5 or 10 minutes after a stop before I start it again. All in all it’s a strong running bike and this is usually just a minor annoyance, still if there’s a quick fix I’d love to hear it.Thanks -Bob
A: Bob, the most common reason a m/c will act this way is because of an intake leak. Start the bike cold. Mist the intake flanges with brake cleaner. If your bike’s idle drops, or the engine stalls, you have an intake leak. If this is the case, replace the intake seals along with the front & rear intake flanges. If the bike passes the intake test; have the dealer or your mechanic scan the m/c for possible codes. You may need to replace your ET (engine temp sensor), TP (throttle position sensor), or your IAC ( idle air control sensor). Thanks for the question and good luck.