| Author | Message | ||
     Ohsoslow |
Hey guys, has anyone run into these bikes popping and surging 500-800 RPMs at an idle hot or cold when cam timing changes, possibly due a tensioner letting enough slack in the chain to affect this? My bike is an 09 with 19,000 miles and have had it since new. Valve adj. Done at 13k miles (they were tight...big time) premium gas, oil changes etc all done. Mods are - RT3 exhaust - EBR race Ecm tuned for barkers - EBR rotor, stock stator This thing pops hard on decel around 3-4k, it does this warm or cold and will surge up and down at idle several hundred RPM warm or cold. The popping will happen on decel even if light throttle is given, enough to take away the engine braking but not be accelerating. Things I have done to to figure this out with no success - cleaned grounds/powers. Batt, starter, frame, etc. - put my barkers exhaust back on - put stock Ecm back on (this made it worse than ever) - checked for intake leaks under the TBs with flammable carb cleaner. Anyways let me know if my theory doesn't make sense or isn't possible. I'm open for other suggestions as well. Thank you. | ||
| D_adams |
Send the ECM to IDSPD and have it flashed with the correct calibration that matches the exhaust. | ||
| Ohsoslow |
Had the the issue went away when I stuck the barkers back on I wouldn't hesitate to have it reflashed. It is worth mentioning I have had the rt3 installed for about 3k miles, this has started in the last 500. | ||
| Stevel |
Sounds like an exhaust leak. Significant reflected vacuum exists in the exhaust system and if fresh air can enter, popping is a common result. | ||
| Ohsoslow |
Well, i figured out what was causing the popping on decel and the surging at idle......The fuel pump. I was cruising about 60 mph half way into the 100 mile ride i was on when all of sudden it it seemed like someone hit the kill switch, the bike just died. I coasted off to the side of the road, in the middle of no where go figure. As i was comming to a stop the check engine light came on, I thought, ok, at least i will have an idea what is going on. Popped into diag mode and there is was....."fuel sys prs err" or however it looks on the display, you get the idea... So i click through to the fuel pressure reading... "0 KPA". Cycled the key off for a few seconds and then back on, no noise from the fuel pump, cycle back into diag mode fuel pressure reading "0 KPA". Perfect, I've been here before, fuel pump must be dead. So i called my buddy to go to my house, get my truck, straps, ramp, etc. and have him come pick me up. While im waiting I check fuses and connections, all good. As the bike cooled I was able to get it sort of running, but the pump would hardly give enough fuel pressure to let it idle and then once it warmed back up it would die and not re start. Once we get the bike back home I start checking things out, it was cool enough by that time it would run fine with exception to the surging while idling. Once it got hot it would die, after some checks with the DVOM i figured the fuel pump was bad, 3rd one the bike has had in 19k miles. Ordered new fuel pump and installed it, the bike is back to running like a champ!!! No surging at idle the popping on decel is pretty much gone other than the normal gurgle here or there.....it running so well gave me the idea to get rid of it before it can leave me stranded again, this was the 6th time I've had to trailer/truck it back home because it was not ride able. After some online shopping I traded the 1125 in on a blue 2014 BMW S1000R with 4500 miles. Life is too short to be upset over a motorcycle, i just couldn't take working on that damn thing and wondering just when the next break down was going to happen anymore. Once i get the chance to clean up the RT3 it is going up for sale, along with a race ECM tuned for Barkers and stock clubman bars with cables and lines. | ||
| Captjoe |
3rd fuel pump? My 09 is up to 22,000 miles and I've never had a fuel pump issue. Do you hear that banging? That's me knocking on wood so hard my knuckles are bleeding.  Anyone notice some type of pattern as to why some guys have so many problems with fuel pumps and others don't? I'm too old to push my 1125 to the limits so other than spirited highway riding, mine has a pretty easy life as a sport tourer. Maybe that's the difference.... | ||
| Ohsoslow |
That is a good question, I can say that I rode mine probably harder than normal but it certainly wasn't the type of abuse that track days put bikes through. It's probably a combination of heat and vibration causing issues. | ||
| Nuts4mc |
O So Slo...what is the alcohol content (E15?) of your Pump gas up their in the Great Lakes State? ...maybe the pumps seals can't take the Ethanol, swell up and lock the pump's motor...just a thought...have fun on the Beemer...the one (S1K) I've ridden compresses time and space! | ||
| Ohsoslow |
Most of the pumps in my area show E10 some are E15 i cant think of one that is ethanol free that i frequent. The Beemer is a bike on a different level for sure, im still getting used to it. Ive put about 300 miles on it since saturday, so far my only real complaint is bar vibrations, my hands are still buzzing for a while after the ride is over. | ||
| Nuts4mc |
O so slo...just like on the 1125, new/aftermarket (heavier) bar end weights help: https://www.motovationusa.com/bmw-s1000rr-barend-w eights-sliders-ssb01.html | ||
| Captjoe |
Well that's definitely a difference. Mine only drinks Shell V-Power Nitro+ which, it states all over the pump, contains 0% ethanol. I try to stay away from the ethanol blends as the bike definitely appears to run cooler without that crap. | ||
| Zac4mac |
The 1125 fuel pump is cooled by the fuel it's immersed in. Try to not let your fuel level get below half tank and the pump will last forever. Z | ||
| Ohsoslow |
Zac4mac, I don't doubt that is possible.....but don't you see a problem with that? | ||
| Zac4mac |
Yes, I do. However it is the reality. It is a problem in all instances of immersed pumps tho. Lost 2 fuel pumps in my Camaro the same way. The pump is usually at the lowest point in the tank to try and mitigate the problem. Essentially, if you are just commuting and doing short trips, fill up before hitting reserve. If your trip has you refilling fuel quickly, yeah run to reserve and refill. | ||
| Dannybuell |
i have 22K miles on my CR no pump issues. Zac4mac makes an interesting point about pump life. I haven't seen my reserve light in a year or so, is there some way to diagnose that? | ||
| Dennis_c |
run it out of gas   when you turn your key on it should light up. | ||
| Ohsoslow |
I suspect keeping the fuel level above half of a tank is just masking the real issue of heat transfering through the frame/fuel to the fuel pump causing premature failure. Admittedly I did always run the fuel level down till the light came on and never really consisdered the effect it could have on the fuel pump, norhing else ive ever owned with fuel injection has has this issue. It actually always bothered me how hot the frame can get (enough to burn my nephews hand that ran up and touched the frame after a slow city ride one day) but I digress. I kind of miss the obnoxious pounding that thing would produce and the raw feel of the power. One of my neighbors 3 houses down stopped and asked me "what happened to the badass sounding bike?" When I told him I sold it he was disappointed....hehe. The BMW has terrible range, 38 MPG average will get you about 120 miles before reserve, the CR would easily get 160 miles before the light. It also has way less character to the point it is kind of boring from a day to day stand point. In my opinion it is a better rounded bike, I've put 2,000 miles on it so far and have few complaints, fuel range is the only one not easily solved. Enough rambling for now  -Josh |
