2007 Suzuki KQ 700 FI light flash - Suzuki ATV Forum
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post #1 of 17 Old 07-01-2018, 07:22 PM Thread Starter
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2007 Suzuki KQ 700 FI light flash

Hello. I have a 2007 KQ 700 I bought new. I've had the reverse recall done and have kept up on maintenance. Never really had any issues of it not running until a few weeks ago. It died on a trail. I started part replacement. I changed the plug and coil. No help.I got a c41 code so I took off the rear plastic and removed the tank . I checked the fuel pressure. It was 16 psi. I changed the pump and fuel sock. I hooked the battery back up to check everything. It cycled as should and fired right up. I did this a few times and it seemed to fix it. I put the tank back in and bolted it back up and plastics on then reconnected everything. It started once then died. It has no codes only _COO. I'm assuming according to the forums that means no codes. The FI light flashes non stop and it won't start. The pump will cycle once every few times I turn the key to the on position but clicks back off. It will start if I try to hit the starter button while it cycled but will die in a few seconds. I'm so aggravated and have no clue. The only thing I read about now is it might be a fuel relay under the seat? I got the Napa part number and was gonna try it. Any knowledge on the bike is much appreciated

Last edited by BigCountry24; 07-01-2018 at 07:25 PM. Reason: Wrong words in heading
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post #2 of 17 Old 07-02-2018, 07:47 PM
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Really should get a copy of the factory manual for the FI bikes. Their are 7-8 sensors used by the controller and any of them can cause you issues. The manual has pretty straight forward instructions on how to isolate and test each sensor so you don't get into the expensive swap a part mode and hope. That said you need to put a pressure test you fuel deliver again to make sure it is staying pressurized and usually they relay would be managing that function. The pressure test should tell you if you need to replace the relay.

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post #3 of 17 Old 07-03-2018, 01:05 PM Thread Starter
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Ok Thank you for the info. I bought a relay from Napa to try.
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post #4 of 17 Old 07-04-2018, 12:40 PM Thread Starter
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No go!! The relay wasn't the issue. It cranked and ran for 20 seconds then the fuel injection light starts flashing and it dies. I'm guessing the ECU might be the issue. It's the original. Last numbers start with GO3.. was told that was a junk ECU number
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post #5 of 17 Old 07-04-2018, 05:56 PM
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Have you tried taking the injector out and cleaning it..?


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2000 Suzuki King Quad 300 4x4
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post #6 of 17 Old 07-04-2018, 06:50 PM Thread Starter
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No.... The injector is spraying hard when the fuel pump is on
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post #7 of 17 Old 07-06-2018, 08:42 PM
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Quote:
Originally Posted by BigCountry24 View Post
No go!! The relay wasn't the issue. It cranked and ran for 20 seconds then the fuel injection light starts flashing and it dies. I'm guessing the ECU might be the issue. It's the original. Last numbers start with GO3.. was told that was a junk ECU number
Ok first the _C00 means your throttle position is set to low. It should be -C00. Mine does the same unplug your computer blow out the plug and and connector end then plug it back up. You unplug your computer for about a minute or so to kinda reset it you pop it back in it should fire up.

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post #8 of 17 Old 07-07-2018, 05:30 PM Thread Starter
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Would the _COO with the mark on the bottom make the light flash and keep the fuel pump from running while I'm starting it?
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post #9 of 17 Old 07-08-2018, 08:10 AM
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Yes the _COO should be -COO. Also your fuel injector may be spraying but may also be clogged. Mine was only spraying from two ports of nstead of four. I recommend you get to YouTube for moving the COO bar up and a through cleaning of your injector. Hope this helps
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post #10 of 17 Old 07-08-2018, 04:07 PM Thread Starter
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Yes ty for the info. I got the TPS adjusted right. Is now -COO. It seems to be running ok. I'm going to take the injector off and clean it this week. I'm also going to replace the stock ECU with the VDI copperhead plug and play
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