Grand Prix 250
Main Motorcycle: 2003 955i speed triple
Join Date: Oct 2011
Location: Seguin, Tx
bike starts and shuts off if i dont give throttle
i have a 03 955i speed triple.
bike was great until i let it sit for a few weeks without starting it. charged battery, and still seemed weak. checked battery, and it tested bad. bought a new battery, but when bike is cold, it takes a while to start. just turns, and turns, and eventually it will try to fire, and then the next time i try, it fires up.
i went through this for a little while, as the only down side was that people looked at me weird when i was sitting in the parking lot trying to leave work.
i parked the bike for a while, and when i got around to checking it out again, i could not get the bike to start. charged battery, and all of the gauges come on, and the headlights turn on. crank the bike, and there was no noise coming from fuel pump. tested it and all that fun stuff, ended up being bad. replaced it, and now i have fuel pressure again.
charged battery, and tried to start. and just turned over and over, no fire.
hooked bike up to my car to jump it, and starter turned faster than normal, and bike started. ran like crap, and shut off.
today i changed the spark plugs and put it all back together. charged battery, and bike started, and ran good. went on a 10 mile ride. during which, i pulled to a stop sign, and when rpms dropped, bike shut off.
started right up, and drove home with no other problems. got home, and put bike in neutral, and idled for a few seconds and shut off again. bike started up right away.
shut bike off, and went inside to grab some tools. and i thought i would share a little bit of data from my multi meter
key on, lights on-11.96
bike on -12.05
tps closed- 11.40
tps wot- 82.4
ign adv degrees- between 2.5-5.5 but usually at 3.5 just jumps up and down between 2.5 and 5.5
idle rpm is at 1052- 1475
even thought the rpm gauge does not move when this is happening.
all numbers were collected using a obdII scanner, and the battery voltage was with my multi meter
not sure what the idle, ign adv, or tps is supposed to be at, so if there is any numers that sound wrong, please let me know.
and im pretty sure the voltage should be higher when bike is running. so i dont think my battery is being charged properly while riding.
thanks in advance, and sorry for the long post, i just wanted to be as thourough as possible....