GSXR 1000 idle issues

goforit14 · 5/10/16, 9:44 PM

Looking for help. Run 08 GSXR 1000 on alcohol. Has 8 injectors system. for several races now it does not want to idle. Runs OK on track. I change plugs, Air control valve, cleaned low end injectors. Also changed to a new rebuilt motor (because has tranny issues with other) so don't think it is a valve train issue.. It idles very low and then dies. When its warm I have to push on throttle just to get it to start. (never had to do that before). You can hear it a very slight cough at idle. Any thoughts??

goforit14 · 5/10/16, 9:45 PM

Also, has new battery and changed fuel pump when I ran it at Tulsa..

TQ29m · 5/10/16, 9:52 PM

Can you determine if it's an intake or exhaust cough? Good time for a leak down test, could be a valve. Bob

Bear10 · 5/10/16, 9:56 PM

Did you turn the primary idle screw and raise the idle up??

goforit14 · 5/10/16, 10:33 PM

Yes I turned idle up. So far that the jam nut is at end of the idle screw.. Also as I mentioned, I just switched to a newly rebuilt motor. Both old motor and the rebuilt (which had the valves clearance set) do the same thing so don't think it is mechanical.. At least I hope not..

Thanks

HinesFan · 5/10/16, 10:43 PM

Check or change the map sensor also voltage check on throttle position sensor. I had similar issues with my kawasaki first few races

5/10/16, 9:52 PM	#3
TQ29m Senior Member Join Date: Aug 2008 Posts: 6,242	Can you determine if it's an intake or exhaust cough? Good time for a leak down test, could be a valve. Bob __________________ "Being old, isn't half as much fun, as getting there"! Ole Robert I!

5/10/16, 9:44 PM	#1 GSXR 1000 idle issues
goforit14 Member Join Date: Jan 2013 Posts: 96	Looking for help. Run 08 GSXR 1000 on alcohol. Has 8 injectors system. for several races now it does not want to idle. Runs OK on track. I change plugs, Air control valve, cleaned low end injectors. Also changed to a new rebuilt motor (because has tranny issues with other) so don't think it is a valve train issue.. It idles very low and then dies. When its warm I have to push on throttle just to get it to start. (never had to do that before). You can hear it a very slight cough at idle. Any thoughts??

5/10/16, 9:45 PM	#2 Re: GSXR 1000 idle issues
goforit14 Member Join Date: Jan 2013 Posts: 96	Also, has new battery and changed fuel pump when I ran it at Tulsa..

5/10/16, 9:56 PM	#4
Bear10 Member Join Date: Dec 2013 Posts: 125	Did you turn the primary idle screw and raise the idle up??

5/10/16, 10:33 PM	#5 Re: GSXR 1000 idle issues
goforit14 Member Join Date: Jan 2013 Posts: 96	Yes I turned idle up. So far that the jam nut is at end of the idle screw.. Also as I mentioned, I just switched to a newly rebuilt motor. Both old motor and the rebuilt (which had the valves clearance set) do the same thing so don't think it is mechanical.. At least I hope not.. Thanks

5/10/16, 10:43 PM	#6
HinesFan Member Join Date: Jul 2007 Posts: 89	Check or change the map sensor also voltage check on throttle position sensor. I had similar issues with my kawasaki first few races