Hi guys,
A while ago starting my 14 up it was running bad. RPM goes a little how it want itself for a couple of secs.
Doesn´t respond so well on the throttle, hard to hold the RPM up and then it dies. No problem start
it up again but same bad running all the time. Absolutely no codes or errors on the display.
I´m stuck and would apreciate some advice. Bike has only 13000 km on the odo.
This is what I´ve done to fix it but nothing for the better.
Checked all fuses
Battery voltage is around 12.99
Checked fuelpump relay
Cleaned fuelpump, (was very clean)
Cleaned airfilter
Cleaned ON/OFF and Ignition switch
Opened tank cap in case of vaccum issues
Cleaned a lot of wiring connectors
Switched the whole throttle body taken from another working 14, no better
Checked inlet rubber and airbox rubber for cracks and leaks
Bike has still PAIR and all hoses is checked
New sparkplugs
What´s left to do?
Thanks
Go to the bar and say hello and introduce yourself for a start .
Then check/change The plugs
Also check and if needed adjust the tps and stps ,
get the throttle bodies balanced .
Check the tick over is at 1100rpm.
Go through the loom checking a the connectors including the big plug under the left side panel and the ones in the headlight including the ignition ones .
Good luck
Quote from: seth on Sunday, 16 May 2021, 09:26 PM
Go to the bar and say hello and introduce yourself for a start .
Hi Seth, thanks. I thought I did that a year ago. :)
Quote from: seth on Sunday, 16 May 2021, 09:26 PM
Go through the loom checking a the connectors including the big plug under the left side panel and the ones in the headlight including the ignition ones .
Good luck
Ok, done all your advice earlier except the connectors in the Headlight, it´s on my list now. :smile2:
Check your in tank fuel pump, fron the sounds of it its not maintaining enough pressure
Quote from: Eric GSX1400K3 on Sunday, 16 May 2021, 10:21 PM
Check your in tank fuel pump, fron the sounds of it its not maintaining enough pressure
I have another bike I can take parts from. I did that with the throttle body and also the fuelpump.
This second fuelpump might gone broken too then you mean?
Just started it again and now the RPM goes up to around 4000 and stays there until I shut down.
This is so weird. :confused1:
A bad TPS would / could give you the above issues. (as would an air leak on the throttle bodies)
Have a check of the TPS and see if it's working right. Link below.
https://gsx1400owners.org/forum/index.php?topic=263.0
Quote from: KiwiCol on Monday, 17 May 2021, 03:50 AM
A bad TPS would / could give you the above issues. (as would an air leak on the throttle bodies)
Have a check of the TPS and see if it's working right. Link below.
https://gsx1400owners.org/forum/index.php?topic=263.0
I took the whole throttle package from a working 14 bike. Hard to see there would be any leaks on that one.
Or that the TPS and STPS would be out of it then. Having the throttle bodies out I checked the inlet rubber and the airbox rubber
from cracks. They looked fine too.
But you are the second mentioning the TPS here now so I got to put it on my list. I´m out of ideas myself.
Been working with this issue the whole weekend so I got to take a break a couple of days before I get to it again.
Thanks for your advice
Questions, I saw on EBay someone sold fuelpump pressure regulators to our bikes. They had different psi though.
Which psi should I choose?
Just struck me now, Is there any difference between a fuelpump from a 2005 and a 2003? If there is, that might cause my issues.
No, no different pump, they are the same all years.
Sorry to throw another potential issue into the mix, if it runs but then goes to 4k rpm, it may well be the secondary throotle actuator playing up.
This is like a cold weather choke, its supposed to activate when bike is cold, sets the rpm to 2500 rpm or something like that and then gradually drops the revs as the bike warms up back to 1100rpm.
Apparently the STP sctuator is not serviceable, but if you have balanced the throttle bodies and adjusted the TPS and STPS, it should work ok. Plus this displays the C28 error code when you bridge the ecu connector (FI error on the dash)
Another thing to check is those narrow air hoses going to the TB's from the pairs system & the ?? sensor. The one under the tank in the centre of the frame. If they're off or leaking you'd get that & it would be the same on both sets of TB's as you're using the same hoses.
Another (different) thought, what about the clutch switch? I wonder if it's stuck "in" and staying on 'start' mode for the ecu?
Quote from: KiwiCol on Monday, 17 May 2021, 12:11 PM
Another thing to check is those narrow air hoses going to the TB's from the pairs system & the ?? sensor. The one under the tank in the centre of the frame. If they're off or leaking you'd get that & it would be the same on both sets of TB's as you're using the same hoses.
MAP sensor.
Yeah, that one . . .
Quote from: KiwiCol on Monday, 17 May 2021, 04:49 PM
Another (different) thought, what about the clutch switch? I wonder if it's stuck "in" and staying on 'start' mode for the ecu?
If it´s the little black thing fastened on the downside of the clutch master cylinder near the clutchgrip I have already taken that from the other 14.
But I will check it, can always hope it is that simple :)
I have just ordered a little thingy so I can check if there is any error codes.
And I found out that the pressure regulator operates with 43psi (3,0 bar) i Will order one of thoose to.
This is what I have on my new list then.
Check clutch switch
Check TPS
Check STPS
Change MAP sensor and hose
Clean/check the rest of the wiring connectors (headlight ones)
I will get back with a report how it goes later on.
Meanwhile, please post if you got some more tip.
Thanks
Sounds like youre on top of it, im sure youll sort it out. Just be aware you need the throttle bodies balanced before checking and setting the tps and stps sensors. The morgan carbtune pro is ideal for balancing...
Some more info.
I have 2 GSX1400 but none of them is a runner for the moment. I have had a K5 for some years and that one have
soon 110000 km on the clock and was working fine last season.
Last year I bought a project bike which is a K3 (only 13000 km on the clock). This bike has the issue.
It was crasched and a lot was damaged. Needed new frame which I got from Germany. The past winter I have borrowed
parts like forks and tank from my K5 to get the K3 in the Swedish register this spring. It was working fine in the beginning
but there was something anoying with the idle from the beginning and it sometimes died when driving as the idle dropped very low
when slowing down dropping the throttle like in front of a traffic light, I could see CHEC on the ODO when that happened.
No other codes as I don´t have that thingy to get them if there are any.
Suddenly one day idle was starting to be rough and didn´t respond well on the throttle, just wanted to die
when turning the throttle. Another day it didn´t start at all. Fuelpump and starter did but engine didn´t.
When I got it going again the idle went straight to 4000 RPM. I could increase RPM but it went straight to
4000 again. I turned it off and since then only Fuelpump and starter starts.
I havent´checked TPS and STPS but reasoned like this if I take the K5 throttle package they would be fine.
Issue didn´t get worse or better doing it so doesn´t think problem is in there.
Now I wait for the code check thing.
If that doesn´t give any clue next thing to do will be to take all the electrical wires and electronic parts
from the K5. If that doesn´t help...well, meanwhile I might buy an XJR to have something to ride on this summer. :grin:
These bikes have a tip-over sensor.
Due to age these can get faulty too.
Have you checked / exchanged that recently?
Just to rule things out
Yami, your bike wont start now, spins with starter but doesnt go? Answer me that and can go thru some checks with you.
Quote from: Blubber on Sunday, 23 May 2021, 09:17 PM
These bikes have a tip-over sensor.
Due to age these can get faulty too.
Have you checked / exchanged that recently?
Just to rule things out
No that sensor isn´t exchanged/checked yet as well as the Regulator isn´t.
Tough to reach them down there. :embarrassed:
Quote from: grog on Monday, 24 May 2021, 05:51 PM
Yami, your bike wont start now, spins with starter but doesnt go? Answer me that and can go thru some checks with you.
Yes, starter and fuelpump spins, engine doesn´t go for now.
Maybe have some time to keep doing checks this weekend. :)
Yami, does it have spark, just test at plugs. Fuel pump operating, does it have pressure. They are the basic first two tests.
As far a I recall, the tip-over sensor cuts the fuel pump. So as you say the pump is running that sensor should be fine.
The tipple over sensor is also connected to the gear indicator in some way as when I had a problem it started ok but cut out when I put it in gear .
:cheers:
Now I never knew that, but then I've never had an issue with one.
My problem wasn't the sensor itself it was corroded connectors on my k2 .
When it was 3 Scott ish winter's old and lived 10pfeet from the north sea back then .
Quote from: grog on Tuesday, 25 May 2021, 06:23 PM
Yami, does it have spark, just test at plugs. Fuel pump operating, does it have pressure. They are the basic first two tests.
It had spark before and the tank/fuelpump is exchanged from the K5. Either may have gone broken recently.
Don't have a gauge to check the pressure but I have ordered pump and regulator for the fuelpump. It will be delivered in the end of june.
We have to wait to find out whats wrong.
Meanwhile I will ride a XJR1300. Went to the shop yesterday and bought one. I'll pick it up saturday. Happy days :cheers:
It's a 2013. Not my first XJR, had one RP02 model 10 years ago. This will be a FI one though.
Mate, enjoy your new ride. One day well sort your 14. Both brilliant bikes.
Quote from: grog on Wednesday, 26 May 2021, 07:06 PM
Mate, enjoy your new ride. One day well sort your 14. Both brilliant bikes.
Thanks, I have to, invested a lot in the K3 14. Gonna build it little my own way is the plan.
And I will use the K5 to achive it if necessary.