03 r6 not starting. Fuel pump not priming - Yamaha R6 Forum: YZF-R6 Forums
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post #1 of 5 (permalink) Old 12-12-2012, 01:27 AM Thread Starter
My R6 eats me.
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03 r6 not starting. Fuel pump not priming

Hello everyone. I have a 2003 r6 that ran perfectly until I parked it in my garag for 2 years. The battery died and I got too busy to ride so I just left it in the garage for 2 years with gas in the tank. I know now that wasn't a very smar thing to do but I didn't know it back then. Anyway I bought a new battery and went to start her up and she cranks but does not turn over. I also can't hear the fuel pump priming. I ordered a fuel pump on eBay and it will be here by sat. I also read that it may be the fuel pump relay causing the issue. Where is this relay located? How can I test my old fuel pump to see if It is actually broken. And advice is greatly appreciated. Thanks in advance!
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post #2 of 5 (permalink) Old 12-12-2012, 06:56 AM
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Re: 03 r6 not starting. Fuel pump not priming

Did you drain the old gas that has been sitting in it for two years?

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post #3 of 5 (permalink) Old 12-12-2012, 07:40 AM
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Re: 03 r6 not starting. Fuel pump not priming

+1 . . get that gas OUT. unsnap the fuel lines to drain any bad gas from the fuel rail too. I don't know where the relay is, but there is a thread about that not long ago. If you do find the relay bad (as it sometimes trips/shorts when you put a new battery in) you can hook a small hose to the fuel pump. When it primes (if you get it to prime - and should check your Ebay one too) it should push a stream of fuel into a bucket for a few seconds during time it primes. A fuel PSI gauge would be better, need 47-50psi, but doubtful you have one.
if it runs rough once it starts, consider sending us your fuel injectors for service. www.proflowtech.com A good portion of the injectors we get are from boats, bikes, cars, etc. that sat for a long time like your bike did.

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post #4 of 5 (permalink) Old 12-12-2012, 08:56 AM Thread Starter
My R6 eats me.
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Re: 03 r6 not starting. Fuel pump not priming

Yes I drained the old gas out. I think I found the fuel pump relay. It was under the tail fairing and it looked ok. I got a pump coming from eBay this Friday so I guess I'll see then if it will work.
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post #5 of 5 (permalink) Old 03-22-2013, 04:34 PM
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Re: 03 r6 not starting. Fuel pump not priming

I just had this problem. I don't know how different our bikes is but the Fuel pump uses the Main relay which is under the tank. There is 2 relays it is the one closes to the left of the bike if your sitting on it. I changed it and now my pump is working great

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