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Old 02-25-2013, 09:12 PM   #1
Joshua42007
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06 GSX-R 1000, loss in power above 7k rpms.

I've been having this issue with my bike lately. I noticed the problem began after changing out my spark plugs. I'm using the same plugs as before, same part number.

I began removing the plugs one night, I didn't finish that evening so I had the bike sitting for a few days. The battery went dead, I replaced it and the bike started up just fine.

The bike runs fine and pulls hard until I give it a lot of gas or go WOT. The bike will loose power around 7,000 rpms, or about 85mph, and then it just stops revving. The bike will bog down and the gear indicator will display a dash -- and then after a few seconds, the bike will gain power back. If you are holding the throttle down to much while it is cutting off, the power comes back in a big surge. This happens in every gear.

No FI lights display.

I recently took the bike to Tony for a new front tire. I briefly explained this problem and he said that I can start off by dis-connecting my power commander to see if the problem still occurs. I disconnected the PC3 and the problem still arises.

I'm not sure if it's the fuel pump, fuel filter, injectors or maybe something else If I can fix the problem myself, I'll go that route. Any help would be greatly appreciated, thanks.
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Old 02-25-2013, 09:23 PM   #2
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sounds like a TPS issue to me....check the connections on the TPS switch

does your bike have secondary injectors? maybe something is not hooked up correctly..
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Old 02-25-2013, 09:42 PM   #3
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Quote:
Originally Posted by BYRDMAN View Post
sounds like a TPS issue to me....check the connections on the TPS switch

does your bike have secondary injectors? maybe something is not hooked up correctly..
Good call, not sure about the secondary injectors.

I read that I can pull an engine code, but first I have to set it to dealer mode?

Quote:

Like a check engine light on your car, You need the actual problem code.

Step 1: Remove seat. There is a bolt on each side of the seat, an inch below.

Step 2: Locate the dealer terminal. It is described as a six prong, white in color plug with a black rubber dust cap. The plug may be found under the subframe support truss shown in the picture.

Step 3: Remove black dust cap and expose contacts. Now examine wires and locate a black wire that has a thin white stripe. Locate the second wire which is a white wire with a thin red stripe. Now use an insulated wire (speaker wire will do) to connect the black/white contact to the white/red contact. They should be adjacent to each other.


Step 4: With the kill switch selector on "off", turn the ignition system to the start position. The motorcycle instrumentation, headlight and tail light should all be on at this point. Now, flip the kill switch from "off" to "on" to activate the FI system. You are now in dealer mode. "C00" means nothing is wrong.

C14 - THROTTLE POSITION SENSOR
C15 - ENGINE COOLANT TEMPERATURE SENSOR
C21 - INTAKE AIR TEMPERATURE SENSOR
C22 - ATMOSPHERIC PRESSURE SENSOR
C23 - TIPOVER SENSOR
C24 - IGNITION SIGNAL #1
C25 - IGNITION SIGNAL #2
C26 - IGNITION SIGNAL #3
C27 - IGNITION SIGNAL #4
C28 - SECONDARY THROTTLE VALVE ACTUATOR
C29 - SECONDARY THROTTLE POSITION SENSOR
C30 - SECONDARY THROTTLE CONTROL UNIT
C31 - GEAR POSITION SENSOR
C32 - INJECTOR SIGNAL #1
C33 - INJECTOR SIGNAL #2
C34 - INJECTOR SIGNAL #3
C35 - INJECTOR SIGNAL #4
C41 - FUEL PUMP CONTROL SYSTEM
C42 - IGNITION SWITCH SIGNAL
C46 - EXHAUST CONTROL VALVE ACTUATOR (1000 ONLY)

I also read this, " The little line "--" next to the code - eg C00 is supposed to represent the alignment of the TPS (Throttle Position Sensor)."

Last edited by Joshua42007; 02-25-2013 at 09:44 PM.
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Old 02-25-2013, 09:47 PM   #4
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Im unfamiliar with Suzuki's maintenance or pulling codes...was just trying to point you in the right direction. Im sure someone with more experience will chime in...good luck
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Old 02-25-2013, 10:19 PM   #5
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Sounds like an air leak i would double check and make sure your boots are properly sealed on your throttle bodies, and that they arnt ripped.
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Old 02-25-2013, 10:25 PM   #6
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You had the tank up.
Make sure the line isn't getting kinked when you set it back down. It doesn't have to kink much to affect the flow. It's a common problem on the GSXR's.
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Old 02-25-2013, 10:29 PM   #7
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Quote:
Originally Posted by Patrick View Post
You had the tank up.
Make sure the line isn't getting kinked when you set it back down. It's a common problem on the GSXR's.
yeAH! someone else had the same problem..i remember the gas tank cap was difficult to open due to the vacuum build up..
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Old 02-25-2013, 10:51 PM   #8
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Quote:
Originally Posted by BYRDMAN View Post
Im unfamiliar with Suzuki's maintenance or pulling codes...was just trying to point you in the right direction. Im sure someone with more experience will chime in...good luck
Thanks for your help bro.

Quote:
Originally Posted by Japawhat02 View Post
Sounds like an air leak i would double check and make sure your boots are properly sealed on your throttle bodies, and that they arnt ripped.
I know they are properly seated, but I'll double check for cracks or rips. Thanks.

Quote:
Originally Posted by Patrick View Post
You had the tank up.
Make sure the line isn't getting kinked when you set it back down. It doesn't have to kink much to affect the flow. It's a common problem on the GSXR's.
Good call as well, I've had that issue before and I thought the same thing when setting the tank back down. I had to monkey with with this a number of times to get the bike started ( I noticed this issue the first time I changed the plugs.) I got it to settle without pinching the line and it started up fine. If I can't get the issue solved I'll probably drop the bike off at your shop. If I go that route, I'll call you to give you a heads up. Thanks.

Quote:
Originally Posted by jimrad View Post
yeAH! someone else had the same problem..i remember the gas tank cap was difficult to open due to the vacuum build up..
I've never had issues with the gas cap opening, mine will open and close with no problem. Thanks Jim.

Last edited by Joshua42007; 02-25-2013 at 10:55 PM.
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Old 02-26-2013, 03:48 AM   #9
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Check your fuel pump probale you don't have the correct fuel pressure.
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Old 02-26-2013, 09:14 AM   #10
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Check your fuel pump probale you don't have the correct fuel pressure.
I'll check into that as well, thanks.
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Old 02-26-2013, 09:26 AM   #11
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06 GSX-R 1000, loss in power above 7k rpms.

Yeah id go with tps sensor or fuel pump/delivery issues next now that you've ruled out the pc3
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Old 02-26-2013, 12:33 PM   #12
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Yeah id go with tps sensor or fuel pump/delivery issues next now that you've ruled out the pc3
I'm gonna check those out later this evening after work. I forgot about that front tire at your shop, you can discard it or give it away. Thanks again Tony.
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Old 02-26-2013, 04:12 PM   #13
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did you check your secondary butterflys to make sure they were opening and closing correctly?
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Old 02-26-2013, 05:00 PM   #14
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did you check your secondary butterflys to make sure they were opening and closing correctly?
I haven't checked those yet, but did read about them.

I believe this is what I need to do:

Remove the air box and inspect the valves, When the ignition is turned on the butterflies are moved to the wide open position.
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Old 03-24-2013, 04:43 PM   #15
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Old 03-24-2013, 05:17 PM   #16
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When you install an aftermarket exhaust you have to cut that wire to get rid of the light, it does no damage to the bike at all. I would check secondary butterflys.
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Old 03-28-2013, 09:28 AM   #17
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When you install an aftermarket exhaust you have to cut that wire to get rid of the light, it does no damage to the bike at all. I would check secondary butterflys.
Thanks, I just dropped it off at the dealership. I have work and school, and got tired of dealing with it.

Apparently the Power Commander was bad? That's what they said. Well, I disconnected the PC before and it still had the issue when I tested it. They also told me the PC was in installed wrong, the previous owner hooked it up to the secondary injectors instead of the primary. I've never had any issues like this before, I've had the bike over 2 years now.
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Old 03-28-2013, 09:34 AM   #18
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Extremely curious... would it go up past 7k if you eased into it? It could have just been coincedintal that it happened at the same time but it really sounded like your were describing a clutch slipping.
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Old 03-28-2013, 09:52 AM   #19
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Extremely curious... would it go up past 7k if you eased into it? It could have just been coincedintal that it happened at the same time but it really sounded like your were describing a clutch slipping.
It would do this in every gear while in motion. Yes, if I really slowly eased in to it, it would go a little higher, but not past 7.5k rpm. It starts to cut around 6.5k with a top speed of 85 mph. When I would slowly open up the throttle, I could get it up to about 100mph.

Now when the bike is in neutral and on a stand, it will rev normally with no loss in power.
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Old 03-28-2013, 10:30 AM   #20
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It would do this in every gear while in motion. Yes, if I really slowly eased in to it, it would go a little higher, but not past 7.5k rpm. It starts to cut around 6.5k with a top speed of 85 mph. When I would slowly open up the throttle, I could get it up to about 100mph.

Now when the bike is in neutral and on a stand, it will rev normally with no loss in power.
From what you said about it being in neutral and it acting completely normal it sounds to me (and I may be completely wrong) that there is ok fuel pressure. Now what has me thinking clutch so much is the fact that it only happens when you put a heavy amount of strain on it. Also it is an 06 and do you know if the clutch has ever been changed?

Once again I may be wrong. I hope someone like Patrick Tony or Alan can chime in and let me know if I'm an idiot or if its a valid point
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