engine intermittently quitting under load

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glenn	engine intermittently quitting under load	Lead	[-]
Posts: 221 ( 7-Dec-08 10:55 PM) Border Crosser Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Tags : None A week ago i went on a 2500km ride and just before i got home I powered it away from a set of lights and the motor quit for a second then fired up then quit then fired up. i backed of and it ran normally and i thought it may have had a bit of vapour lock. yesterday i went for a fast ride of about 500km and no problems. Today returning home the problem came back and started when Ipowering on to overtake our roadtrains quickly. there were (are) a lot of them on the road as the wheat is being harvested. the last 250 km the problem got to just rolling the throttle on a bit making even overtaking cars at about 110kmh. As soon as the throttle is backed of it runs fine. i dont have a power commander fitted.everything stock except a k&n airfilter. The bike has about 40,000 km on it I think maybe fuel filter or possibly fuel pump. Any ideas? I have posted this on the cog site as well. glenn
Aussiedav		#1	[-]
Posts: 4788 ( 8-Dec-08 7:06 AM) FarRider Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Glenn that would have happened about 2 or 3 times to me, I put it down to bad fuel but maybe there is more to it. Davo 1400GTR "Roo" & 1000GTR "Griff" IBA #22575 - Davo's Pages
glenn		#2	[-]
Posts: 222 ( 8-Dec-08 10:58 AM) Border Crosser Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	I have spoken with the dealers mechanic and betty is booked in next week for a service and they will look for any error codes associated with the problem. the mechanic said he thinks the fuel pump may not be providing the pressure that is required or the throttle position sensor may be faulty.
Grey Gentry		#3	[-]
Posts: 786 ( 9-Dec-08 7:28 AM) No Apex Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Can you emulate the overtaking manuover (ie no traffic)..and don't back of the throttle when it happens? And see what happens? Does it pick up or continue stalling? Like the mechanic..my thoughts are electronic related. Hope Betty has got error codes Glenn. Perhaps record engine revs/gear/speed for future reference? And to compare? Ron Mildura GTR-AUS #20 The life of a motorcycle rider, giving way, when you have the right of way.
terrylad		#4	[-]
Posts: 15 ( 9-Dec-08 9:33 AM) Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	I'm going over every connector and switch with dielectric grease. This stuff seals the connector. Preventive maintenance. First suspect is always electrical connectors.
glenn		#5	[-]
Posts: 223 (19-Dec-08 4:57 PM) Border Crosser Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	the mechanic is waiting to hear from kawasaki technical people as to what the problem might be. there were no error codes stored. if its the throttle position sensor a whole throttle body assembly has to be replaced as the sensor is not available on its own. i dont know why that is but the assembly is $$$$.$$ expensive.
Aussiedav		#6	[-]
Posts: 4819 (21-Dec-08 9:14 PM) FarRider Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Coming home today mine started doing something like this, the feeling as if there is crap in the fuel and a blockage. Cam good until I backed it off to 4th for a quick pass of some trucks and it started again. Got to my town and flat out getting it home and up the driveway. I am not sure its the same thing as yours Glenn, feels like fuel blockage. Davo 1400GTR "Roo" & 1000GTR "Griff" IBA #22575 - Davo's Pages
glenn		#7	[-]
Posts: 224 (21-Dec-08 10:20 PM) Border Crosser Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Davo i thought at first fuel blockage / starvation but the mechanic said if the fuel pressure drops it will store an error code. it was allmost like turning the kill switch on and off every 1/2 second or so until i backed the throttle off and it came good. he said the fuel pump was providing the correct pressure so he thought that its unlikely the problem. he thinks it may be the throttle possition sensor not working correctly i dont know enough about the fuel injection system but maybe it can block after the pump which may still show correct pressure. on the ride when it got bad it started when i went down to 4th for a quick overtake of a roadtrain. i never held the throttle on to see if the engine stopped completely or just run rough as i was more interested in trying to pass the trucks safely and get home.
Fattymick		#8	[-]
Posts: 395 ( 7-Jan-09 7:16 PM) I Live Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Glenn, have you got this sorted out yet? Michael-Brian Newtron Silver 2008 1400GTR GTR-AUS #181 FarRider # 109 Ulysses #49376 Northam WA
MrsTosh		#9	[-]
Posts: 745 ( 7-Jan-09 8:43 PM) herbal fairy godmother Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Hope you get it fixed up? I call the A1 Betty! Cool! Mrs Tosh HFG
glenn		#10	[-]
Posts: 225 ( 8-Jan-09 6:01 PM) Border Crosser Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	i have done about 800 km since the dealer serviced the bike and it has so far run fine. they were unable to find the fault. maybe it was a bad connection as they checked all of the connectors incase one was faulty. glenn
Aussiedav		#11	[-]
Posts: 4898 (21-Jan-09 10:40 AM) FarRider Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Mine seems to have fixed itself and when I told my wife she thought that was a good thing. I don't see it that way as although fixed at the moment it was obviously electrical and could happen again. I will do the full electrics check next time the plastics are off. Davo 1400GTR "Roo" & 1000GTR "Griff" IBA #22575 - Davo's Pages
Lord jim		#12	[-]
Posts: 50 ( 3-Feb-09 7:54 PM) Hangs Out Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	hi all well this did happen to me as well just today, but it did not re start looked down and found that i had not turned the key fully to the on section of the ignition. This could be the prob with them all just turning and not checking as us mere males do lol jim
Typhoon 90		#13	[-]
Posts: 486 ( 7-Feb-09 9:30 PM) I Live Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Is this happening on lowish fuel tanks? Electric pumps can cavitate or suck in some air if the fuel level is low or teh fuel is hot in an EFI system and often fuel pressure will appear normal, as the air is merely compressed in teh lines, emulating close to normal fuel pressure (pressure can actually go higher if enough air is compressed). This happening under load also reinforces this, as when cruising fuel demands are low, when overtaking, demand goes up and the fuel also transfers towards the rear of the tank, which could be enough to cause the pump to suck in some air with it's fuel. I doubt it's a throttle position sensor, when they go bad they usually stay bad. Besides, the bikes aren't old enough, TPS failures are typically high mileage failures. Fuel filter is a possibility but it would throw a code if the computer does indeed sense fuel pressure as the mechanic said (would be one of the very first fuel injection systems I've heard of that does this though). Another possibility is air intake restrictions. Partially collapsing intake hoses, restricted filters etc can cause this as can simple debris partially blocking an air filter. Don't assume the mechanic checked it. There has been a LOT of dust around the past couple of months. Regards, Andrew. "Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end."
Aussiedav		#14	[-]
Posts: 4921 ( 9-Feb-09 10:00 AM) FarRider Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Andrew, good post. Mine is still doing it, I thought it was only at low fuel but it did it yesterday at just under half. If I am in 6th and drop back to 4th or 5th for a spot of spirited riding it does it about 50% of the time under 1/3 of a tank. Not when full. Does that make sense. Davo 1400GTR "Roo" & 1000GTR "Griff" IBA #22575 - Davo's Pages
Freddy		#15	[-]
Posts: 220 ( 9-Feb-09 6:47 PM) I Live Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Just a note to say that the GTR does not have a fuel filter. My other motorbike is a car with a motorbike engine - 360cc Honda.
Aussiedav		#16	[-]
Posts: 4922 (10-Feb-09 8:32 PM) FarRider Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Doesn't it even have some type of filter in the pump ? I am pulling the tank and fuel pump in the morning. Davo 1400GTR "Roo" & 1000GTR "Griff" IBA #22575 - Davo's Pages
Freddy		#17	[-]
Posts: 221 (10-Feb-09 9:50 PM) I Live Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	It has a gauze bag over the pump inlet to prevent "large" things entering the pump. My other motorbike is a car with a motorbike engine - 360cc Honda.
Aussiedav		#18	[-]
Posts: 4926 (12-Feb-09 7:43 AM) FarRider Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	That would be it then, I recall a brick falling into the tank one day LOL Will look at it after this weekends ride, did it again yesterday but only as the tank gets low and was good till 300-320klms so can work with that for this run as its no biggie. Davo 1400GTR "Roo" & 1000GTR "Griff" IBA #22575 - Davo's Pages
Typhoon 90		#19	[-]
Posts: 490 (13-Feb-09 5:47 PM) I Live Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Freddy wrote: Just a note to say that the GTR does not have a fuel filter. I truly hope that is not true. If it is true that is plain negligence. Fuel injectors HATE dirt and teh whole system will fail very early on. I just can't imagine a fuel injected anything without a filter. I mean, Honda and BMW use filters on their injected bikes....... Just had alook at the tank on teh fiche, teh shape of the tank could be an issue as could teh pump. Has anyone seen the pump out of the tank? The pickup seems to sit about 150-200mm off the bottom of the tank, fuel shosh could be the issue here. Regards, Andrew. "Political Correctness is a doctrine, fostered by a delusional, illogical, liberal minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end." Last Edited By: Typhoon 90 13-Feb-09 6:00 PM. Edited 2 times.
Freddy		#20	[-]
Posts: 222 (13-Feb-09 9:58 PM) I Live Here Reply Quote More My Recent Posts Message Me Connection Blocking Invite Ignore User's Posts	Some other EFI bikes don't have fuel filters either eg most Triumphs.... and Hondas. I don't think a visual inspection will show much. It seems there are some FP issues in the USA too with the same symptoms, which no doubt others have also read. Could be time for warranty. My other motorbike is a car with a motorbike engine - 360cc Honda. Last Edited By: Freddy 14-Feb-09 10:13 AM. Edited 2 times.

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