Senior VR Member
Join Date: Jun 2008
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Injector Advice Needed
A while back, my bike was running crappily. It was missing and backfiring on deceleration. A little detective work revealed a fouled plug on my front cylinder. I suspected an injector was stuck open & spraying too much gas. Luckily I happened to have a complete spare throttle body around, so I swapped it in, and my problem instantly disappeared.
Fast forward a few months, and I have the same symptoms beginning to appear. I can also smell unburned fuel when I'm sitting at a red light. It runs pretty well at 60 mph, though, so my theory is that I'm getting too much fuel at lower rpms, but when I open it up on the highway, the extra air puts the air/fuel ratio much closer to the right mix. It's not missing or backfiring at highway speed, which points me away from it being an electrical problem. I'm not getting any warning lights on the dash. Everything stock - no power chip or anything.
I suspect a bad injector again. I'm going to take a look at the plugs this weekend and that should tell me which cylinder it is. (I'm already de-paired, and I've checked for obvious things like a disconnected hose causing a vacuum leak or an unplugged sensor.) I'm leaning toward just buying a brand new injector to swap in, which is kind of pricey. My question is, if you have an injector that's staying open and spraying too much fuel, has anyone had any luck having it cleaned, or is that mainly for a clogged injector? I'm trying to decide whether to spring for a brand new injector, or to save a few bucks and try to get my old ones working right. I don't want to get an injector serviced and have it flow great on the bench, but stay open and flow too much when back on the bike. Curious to hear what y'all think.