| Author | Message | ||
     Lucas70374 |
I have a 2003 XB9R, Race ECM, Open Airbox Con This morning my bike started running bad around 50 MPH on up, the bike will stall (It will keep running) I had to make it to work so which is about 30 miles. It will run bad till I get below 50, So I rode to work around 45 mph ran fine. It When it started running bad the engine light would come one then go off. The headlights go deam lose all power to the speedo and tach, pretty much lose all power. I put on the computer at work and it showed a few things, ECM low voltage to fuel injectors, a bunch of low voltage things.} | ||
| Iamarchangel |
I'd be looking at a loose connection to the battery cables, and then track back to the ignition cables under the fairing. Before taking anything apart, I'd go for another run and look at the tach instead of the speedo. Is the problem showing up at a particular rpm? Is 50 low fifth gear rpm but 40 is high fourth gear rpm? My 9R is not happy around 60. She wants to be well above it or well below it. She really wants to sing at 4200rpm. (Message edited by Iamarchangel on October 28, 2008) | ||
| Jos51700 |
Ditto the loose battery cables. | ||
| Punkid8888 |
how about a bad stator or voltage regulator that is only charging at lower rpms? | ||
| Glitch |
How about checking the trouble codes? | ||
| Lucas70374 |
I will be checking battery cables today, its not RPMs cause I can run the hell out of it and it runs fine its more cruising speeds. I will let you guys know what I find out plan on taking a look in the next few hours. The trouble codes show low voltage to everything Glitch | ||
| Lucas70374 |
Ok so I changed the ECM, still problem.. Question to someone about the o2 sensors, The only problem I noticed was the exhaust gaskets are "shot" Would a exhaust leak cause the problem of missing around 50ish Remember its like I lose all power the bike. Codes are Low voltage to almost everything. Idle runs fine. I can run like a bat out of hell and it will run its mainly cruising speeds. Lights dem. | ||
| Iamarchangel |
Humour me, what rpm is your bike showing at 50mph? And, are you noticing any vibration at that speed? How does it do at 4200rpm? In fourth? In fifth? How does it do at 3200rpm in fourth? In fifth? Unless Jos corrects me, your electronics are rpm related not speed related so it's not likely the O2. Code 16 is the one that indicates low voltage. It says check wires and outlines a sequence to follow. You should probably do that. To me, something is coming loose with the vibration that comes at the bottom of fifth. Find it, tighten it up and you're golden. | ||
| Firemanjim |
You changed the ecm, did you reset the TPS because you should do this anytime you swap the ecm. Bad grounds do all kinds of odd things, check battery cables and engine ground strap. | ||
| Lucas70374 |
Thanks for the help anyway guys, Ill let yall know what I find out. jim, yes I changed ECM and reset trouble TPS. I will check engine ground strap. I might even swap the battery with another one I will put new exhaust gaskets in just to give that a shot. | ||
| Slaughter |
If you can get a fully charged battery - try that. It'll tell you whether you still have a low voltage problem... then if that worked, you can start chasing the charging problems (after verifying cable connections are all OK) Low voltage WILL give you all sorts of problems. DAMHIK | ||
| Duff24 |
I had similar problems at about 110mph where it really started cutting out. Didn't happen in any other gear but 5th. Turns out the wires comin from the VR were gettin pinched by the chin fairing against the timing cover. I'm guessing it was the vibration of everything at that particular speed causing it to short...no problems 10k later. | ||
| Lucas70374 |
thanks Duff, thats something im going to check | ||
| Lucas70374 |
ok So I checked everything and come to find out I had 2 wires under the front fairing showing bare wire and touching. I am assuming that from the vibration of the bike around 50 would make them touch and short out | ||
| Deadduck |
you might want to consider changing your name from Lucas to something else.....that name put a curse on everything electrical coming out of England for a long time. Lucas, the Prince of Darkness Lucas electrical components' fallibility is a perennial subject of discussion among the nutty, and often erudite enthusiasts of British sports cars and motorcycles. There are many interesting views on the positives and negatives of Lucas parts, and the discussions are always enlivened by the humor which cloaks the Prince of Darkness. For sure, Lucas jokes will always be amusing. Since Lucas jokes are so easily found on many websites devoted to those magnificently wonderful British machines (did i give myself away there?), why bother repeating them here? Simply because I have yet to find a list which includes every one of the jokes below, even if the one representing my own attempt at Lucas humor is discounted. Know any more good Lucas jokes? Shine some light on the subject, send them here and I'll include them with the list. The Lucas motto: "Get home before dark." Lucas denies having invented darkness. But they still claim "sudden, unexpected darkness" Lucas--inventor of the first intermittent wiper. Lucas--inventor of the self-dimming headlamp. The three-position Lucas switch--DIM, FLICKER and OFF. The other three switch settings--SMOKE, SMOLDER and IGNITE. Lucas dip-switch positions: LOW and BLOW (Bruce Miller, www.hermit.cc) The original anti-theft devices--Lucas Electric products. "I've had a Lucas pacemaker for years and have never experienced any prob... If Lucas made guns, wars would not start either. Did you hear about the Lucas powered torpedo? It sank. It's not true that Lucas, in 1947, tried to get Parliament to repeal Ohm's Law. They withdrew their efforts when they met too much resistance. Did you hear the one about the guy that peeked into a Land Rover and asked the owner "How can you tell one switch from another at night, since they all look the same?" "He replied, it doesn't matter which one you use, nothing happens!" Back in the '70s Lucas decided to diversify its product line and began manufacturing vacuum cleaners. It was the only product they offered which didn't suck. Quality Assurance phoned and advised the Lucas engineering guy that they had trouble with his design shorting out. So he made the wires longer. Why do the English drink warm beer? Lucas made the refrigerators, too. Alexander Graham Bell invented the Telephone. Thomas Edison invented the Light Bulb. Joseph Lucas invented the Short Circuit. Recommended procedure before taking on a repair of Lucas equipment: check the position of the stars, kill a chicken and walk three times sunwise around your car chanting: "Oh mighty Prince of Darkness protect your unworthy servant." Lucas systems actually uses AC current; it just has a random frequency. How to make AIDS disappear? Give it a Lucas parts number. Recently, Lucas won out over Bosch to supply the electrical for the new Volkswagens. So, now the cars from the Black Forest will come with electrics supplied by the Lord of Darkness -- how appropriate! Lucas is an acronym for Loose Unsoldered Connections and Splices. The Prince's last words to his son: "don't go riding after dark" (via Bernie Allan, BritIron Newsgroup) Lucas jokes: black humor. (Bruce Miller, www.hermit.cc) |
