After being in stop and go traffic at low speeds for 10 minutes the bikes shutts off. Feels like it is drowing either the fuel is too rich or to lean. Its a 2002 S4 19k miles with termis, ( dont think the full exhaust), has a dry clutch and assuming the stock ecu and air filter. Could the ecu and air filter be the problem? Might I need a power commander? The guy whom I bought it from said that it is not meant to run at low rpms and gases build up. Then when its shuts off I ought to give it 20 seconds and then start it. What do you guys think. The mechanic who took care of the bike and the ex owner have good references so I believe them.
Your bike shouldn't stall in traffic after 10 minnutes. First steps should be your basic settings; CO trim, TPS adjustment, idle speed and throttle synch.
I hope you are mistaken but I agree with you. I am not familiar with the terms you mentioned. I will see the mechanic within the next couple of days as well the previous owner. It does not seem right for a bike to shut off just because of stop and go traffic. My previous bike, kawasaki 636 had no such issues. Thanks for your help.
In simple terms CO trim is adjusting how rich or lean the fuel mixture is. 4% or so is fine This adjustment mostly effects idle and low speedWhat you are adjusting is how long the fuel injectors are open. The TPS (throttle position sensor) tells the computer how much the throttle is open. Oh, my bad...check TPS first. Idle speed is well, what RPM is the bike operating at. Synching the throttles is both cylinders to run as equal as possible.
using a term you're probably familiar with, they're full of shit. unbelievable that people say that and expect someone else to believe it.
there's somethng wrong with it.
how does it cut out?
do you lose all electrics?
does the engine just die with the dash lights, etc, still working?
does it start up again ok?
The main problem will be the TPS ( throttle position sensor ) the S4 is very sensitive to this at low speeds and they drift off avery few months ...its easy to setup if you have a multimeter and some knowledge ,, then get the throttle bodies balanced and air bleeds adjusted.
I have owned an S4 for 6 years and service it myself and know these issues intimately
I am pretty new with this bike and was used to a Kawasaki 636 which feels very different. IF I recall correctly when its hovering at 1k rpm it seems ok . When the issue happened again yesterday it was idling between 1k-2k and then it shut off. The electronic where still on. Out of five times, once I tried starting it immediately and the bike would not turn over. It would try but it could not. Then the other four times I gave it like 20 seconds and it started right up. I am not driving her hard. I am shifting up at around 4.5-5.5k rpm. On different occasion I do recall idling and the rpm being low, around 500-800 rpm and then shutting off.
The bike is awesome. I don't expect the guy to show face for this issue but I have a feeling he will. Regardless, I will make sure she runs well. It was frustrating because it was the first time I took my girlfriend out on her and she did not enjoy it (she says she did but it was not the best ride ever) due to it shutting off, she kept saying that she enjoyed the Kawasaki better.
Quote from: Qomomoko on March 13, 2011, 07:13:48 AM
It was frustrating because it was the first time I took my girlfriend out on her and she did not enjoy it (she says she did but it was not the best ride ever) due to it shutting off, she kept saying that she enjoyed the Kawasaki better.
This is inexcusable! [thumbsdown] DMF to the rescue!!! 8)
If this happens in stop-and-go traffic but not when moving at a good pace I would think the issue comes from either overheating (not the engine, more likely an electrical component) or from low gas/air mixture speed.
Aside from what's already been suggested I would like to add checking the fuel filter, fuel lines and the injectors: the filtering element might have broken down over time and have started to clog up the injectors.
Cheers and let us know how it goes. [thumbsup]
Is it idling smoothly, or is it stuttering?
I may have the same problem on my '04, actually.
Took it to the mechanic who introduced me to the owner and he was really nice. I have been there twice and he has been balancing/tuning the motorcycle. Seen him playing with gages that seem to be used to measure the piston compression pressure and balance between both pistons as well as other stuff with a ducati computer diagnostic tool. It is behaving much better. He said to please give him a call and update to see how its behaving. He has not charged me anything. Very happy with it. Today's morning ride it turned off twice, once because I did not throttle enough out of red light when releasing clucth and other probably some similar. Nonetheless, feeling much better about purchase now its waiting time till track day on april 10.
Been a while since been on this forum but..
After the problems above it appears that the real problem was the program on the ECU.
Got new ecu and programmed to bike with Termi slip ons and bike behaves much better. Rarely does it turn off but it does, when it does it is usually when cold but after running it its good.
also ended up changing the Battery to higher cranking amps and Li battery.
also changed the VR to a mosfet after the stock one melted.
currently doing some upgrades and this forum has helped with tons of info.
Actually it is not that there was a problem with standard ECU its that the S4 runs nuch better with DP ECU and termi mufflers or a power commande PC3 , they allow the engine to work at its natural abilty unfettered by enviromentalist regulations .
i makes biggest difference in low speed operation .
Thanks for the info,
I love the bike but so many little problems. I guess also the age 2002 and 24005 miles does not help.
Quote from: Qomomoko on November 04, 2013, 08:50:43 AM
Thanks for the info,
I love the bike but so many little problems. I guess also the age 2002 and 24005 miles does not help.
24k? You're just getting it broken in.
FYI - on a hot day, my M750 will do that in stop & go. It is more likely to happen when I've got less than half a tank of fuel too. I guess the fuel gets warm on the tank and then vaporizes in the lines/filter as it goes over the cylinder head. I've got nearly 40,000 miles on my 750 and it's got no real issues. Privateer is right, just barely broken in.
JM
Have you tried an Italian Tune-Up first?
Glad to hear 24k is little. Now I got tank problem but working on it.
Also not sure what an Italian tune up is .
Wikipedia is your friend! Of course, my though was just drink a bottle of chianti and go for a ride!