| Author | Message | ||
     Sprintst |
Some may remember I had this problem awhile back, and it's doing it again. If the bike has been running for a while, it doesn't want to restart. It acts like it's not getting fuel. I typically have to give it some throttle to get it to start, but it's not very predictable. Stock except for the EBR ECM, though as I recall it did it on the stock ECM too. Dealer looked at it, couldn't recreate the problem I did have the line pinched crossing the airbox cover, which I thought was causing this problem. Any thoughts? Gets embarrassing have to crank and crank it, and giving it some throttle can result in backfire into the airbox, so I try not to do that method, if I can help it. | ||
| Father_of_an_era |
I had this issue about a year after I bought my 08R. If I rode the bike to the store, it wouldn't want to start when I jumped back on it to leave. It typically took 2 or 3 tries to start it. Sometimes it would back fire or pop like it was a bit flooded when attempting to start it. The problem ended up being a faulty fuel pump. Maybe you can check that out? | ||
| Knthorne |
Does it have a carbon canister? | ||
| Sprintst |
bought in NC, so it shouldn't have a carbon canister, right? | ||
| Rogue_biker |
I've had this happen occasionally. If it doesn't start within a couple of seconds, I turn the ignition to off and wait a second, then re-start. It usually fires right up after that. | ||
| Boogiman1981 |
i've gotten into habit of clearing spark plugs at every hot restart and even at times wedging the throttle open while i'm sitting. i do have the carbon can even though im in florida due to liquid fuel being spilled from the vent line which made the hot restart issues much worse. | ||
| Froggy |
Probably not, but it is possible. Pop off the front seat, you can't miss it, it is black and a little bit larger than a soda can.  | ||
| Rogue_biker |
Okay that picture has made me realize my Charcoal cannister is missing the hose that leads down past the sub-frame. There is a hose that leads down past the sub-frame right? | ||
| Captjoe |
Not sure if the 1125r would have this problem, however, the fuel injector system might be experiencing vapor lock. If the engine is very hot, the fuel within the fuel injector system might be evaporating before it can be directed into the cylinders. Once the engine cools down somewhat, the fuel is able to flow and the engine starts without a problem. | ||
| Boogiman1981 |
capt if the ecm fuel pressure swtich and fuel pump are working correctly it's highly unlikely. the system is designed to keep the pressure in the line high enough to avoid vapor lock. even after shutdown the fuel pump cycles for a while to maintain pressure to avoid boiling fuel in the line itself (Message edited by boogiman1981 on April 04, 2012) | ||
| Nuts4mc |
Check your ground(s)( at the battery and at the swing arm pivot)...as an electrical motor gets hot the resistance builds and it needs more Amps...(hot rods with headers too close to the starter need big gauge wire to spin the starter)I run a 4ga starter wire (like from a'60s Ford) 40in long from the ground by the swing arm pivot up over the engine and down to the block bolting it to the starter motor with one of the mounting bolts for that starter. Out here in the Southwest it gets hot and it's embarrassing to not be able to start up after a fill up when riding with my rice burner buddies...if interested PM me I'll send you the Autozone P/N for the starter cable...it works for me. | ||
| Poppinsexz |
If you have the charcoal canister installed it can redirect fuel vapors into the intake and cause hard restarts. Usually has to be a hotter day and really get the fuel tank/frame hot enough to produce alot of vapor. I have the same problem in the summertime. | ||
| Froggy |
That picture was the first hit on Google for a carbon can, the one used on Buells is slightly different. There are two hoses coming out of it, one from the frame(gas tank), the other going to the throttle body. | ||
| Rogue_biker |
Froggy, yes I know about the hoses going in. I have no hose going out so if I overfill, fuel goes to can and drips down the sub-frame. So was wondering if OEM had a hose leading from can down past the sub-frame. I guess I can look at my Service manual to confirm but I'm at work right now. SShhhsssss.....don't tell anyone I'm here! LOL! | ||
| Captjoe |
Boogiman1981, you're correct. I'd forgotten about the R2D2 beeps. However, you might also be correct in that the full pressure switch might not be working properly. | ||
| Dannybuell |
Nuts4mc ~ what is the stock starter wire length and guage? | ||
| Nuts4mc |
the "stock" wire and gauge isn't the issue when the engine is cold(the starter motor is cold too) when the engine is hot the stater motor needs more amps to turn over the beast - which means less voltage for the ECM and spark plugs ( that's why old cars had ballast resistors in their ignition circuit - the coils were designed to run on less than 12VDC and that's what the coils "saw" when the engine was cranking...once started the resistor helped keep the coil from overheating and cooking on the voltage available.) I suspect the grounding of all the systems are "marginal" (Hmmm wonder if we should tell the guys on the charging topic...) Bottom line by "over-engineering" the ground (adding the 4 ga wire AutoZone, Duralast brand P/N DW440B) it runs a ground directly from the battery to the starter motor and of course the engine. My reasoning to do this: 1) The Ulysses model of the Buell line was known to have grounding issues 2) there was a time early in the 1125's life that people were adding grounds from the battery to the sub frame (which is bolted to a painted frame - did it help? did the paint insulate the connection? did the attaching bolts carry the connection? was it worthless? 3) I know of one other company that had ignition issues due to poor grounds but when a dedicated ground was run to the frame mounted coils from the battery the bike showed a small increase in HP. 4) it's a cheap "fix" to help what I suspect is a marginal wiring harness. ( I've played with too many old muscle cars...see my original post on this subject) the starter is pulling power away from the ignition system - the plugs don't fire - the motor won't start. | ||
| Daggar |
My bike was having the hard start issue a couple years ago. It was under warranty, so I took it to the dealer. They said the grounds were loose. The hot start problem was greatly reduced after I got the bike back. It still struggles a little bit. Thanks for the info, Nuts4mc. I may try upgrading my grounds. | ||
| 03fatboy |
I agree with the cannister if it is installed. I have a 848 Ducati that when hot the cannister dumps the fumes into the intake and the only way to get it started is to open the throttle so it gets more air and it isn't choked with too much fuel. | ||
| Dannybuell |
I took my cali can off because after a while it ran like crap. I think I over filled the gas tank one too many times, it failed and got plugged. My hot start problems are not nearly as severe. Nuts4mc ~ I reread your last post, did you add an additional ground? | ||
| Nuts4mc |
DannyB - yes I have a re-dun-dent ground...from the ground stud by the swing arm pivot ..up over the shock... along the base of the air cleaner...down to the stater motor...the wire is black - just looks like another hose...do you want some pix? | ||
| Daggar |
Pics would be rad. | ||
| Dannybuell |
pics? yes please | ||
| Nuts4mc |
PiX number 1 - from left side looking up into swingarm  | ||
| Nuts4mc |
Pix #2 - DuralastP/N  | ||
| Nuts4mc |
looking down past rear brake resv  | ||
| Nuts4mc |
Up and over shock  | ||
| Nuts4mc |
side view  | ||
| Nuts4mc |
termination  | ||
| Dannybuell |
cool |
