Spitting, sputtering and starving for gas - Yamaha R6 Forum: YZF-R6 Forums
 
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post #1 of 6 (permalink) Old 06-17-2019, 08:18 PM Thread Starter
My R6 eats me.
 
Join Date: Jun 2019
Posts: 4
Spitting, sputtering and starving for gas

So I volunteered to help my buddy out with his Frankenstein R6, his bike is an 02/04 (frame and miscellaneous parts) and an 05 (engine). He called me saying it was slightly hesitating. Once he rides up it sounds like death, won't idle, and sounds like it's starving for fuel.

First thing I did was pull the fuel pump, sock was filled to the brim with dirt and bugs, cleaned that put it back on sounded exactly the same. Checked spark 1 cylinder with 0 spark, 2 with limited spark, 1 good spark, so I went ahead and changed all 4, and checked each coil and they were all good to go. Went into diag mode and had 2 codes tps, and exup. Tps had a base of 24, took it off cleaned it with contact cleaner, put it back on and set it to 17. Fires up then sputters right out, now it will only run when fluttering the throttle like a crazy person and even then won't pass 2k rpms. I am completely out of ideas on how to help him. The bike has great fuel pressure, spark is nice and strong, air is unrestricted but something keeps killing the bike.
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post #2 of 6 (permalink) Old 06-18-2019, 04:06 PM
I eat my R6
 
Join Date: Jan 2016
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Bike: 2015 R1
Garage
Re: Spitting, sputtering and starving for gas

well for one none of those years had and exup valve in the exhaust. so no way you're getting an exup error code. I would replace the tps or use a good analog volt meter on it to watch it for spikes or dips as you rotate it.
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post #3 of 6 (permalink) Old 06-18-2019, 05:31 PM Thread Starter
My R6 eats me.
 
Join Date: Jun 2019
Posts: 4
Thank you for confirming that there was no exup, I looked up and down the exhaust for it and just thought I was blind. As far as I know the computer is an 05 as well, which confused me. I will check with a multimeter when he brings back the tps. He took it with him to Yamaha to try and see if it was the recalled tps, even after I told him they wouldn't do it that way.
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post #4 of 6 (permalink) Old 06-19-2019, 04:05 PM
I eat my R6
 
Join Date: Jan 2016
Posts: 2,669
Bike: 2015 R1
Garage
Re: Spitting, sputtering and starving for gas

yeah no recalls on it. what were to 2 codes? (numbers). do you need an actual yamaha service manual? there's one available for free on the R6messagenet.
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post #5 of 6 (permalink) Old 06-24-2019, 08:03 AM Thread Starter
My R6 eats me.
 
Join Date: Jun 2019
Posts: 4
Replaced the tps same exact thing. Except without the tps installed on the throttle body but plugged in I can start the bike, it will idle even rev without any hesitation (while manually turning tps), but the second you open the butterflies with the actual throttle the bike dies instantly.
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post #6 of 6 (permalink) Old 06-24-2019, 08:05 AM Thread Starter
My R6 eats me.
 
Join Date: Jun 2019
Posts: 4
As for the code question only 2 codes were exup stuck open (which the bike doesnt have one) and tps not within spec (and 100 other characters basically saying the same thing)
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