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post #1 of 7 (permalink) Old 07-05-2011, 11:06 PM Thread Starter
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Fuel pump not priming

I hope this isn't a stupid question, but...

I hopped on my 2010 ABS Thunderbird this morning, put in the key, turned it and wasn't greeted by the familiar whine of the fuel pump priming the engine.

In addition the instrument display looked odd. The ABS and check oil lights came on, as they do when the key is turned but the engine isn't running. However the display toggled itself to the gas remaining screen, but instead of showing 3/4 of tank as I would expect, it shows kind of blankish. There are a bunch of little horizontal bars across the bottom.

The odomoeter, trips and clock show fine when I toggle to them.

I checked all the fuses, verified the kill switch was in the "Run" position, lifted the sidestand into the running position, shifted into neutral, (although the green neutral indicator light did not come on). Still wouldn't prime.

The headlight shines brightly, and the alarm arming with its usual volume when I remove the key lead me to believe it isn't the battery, and the Triumph Optimate indicated that the battery was fine as of 2 days ago.

I ride the bike daily and yesterday it was fine.

I ordered the service manual a couple of weeks ago, but it hasn't shown up yet. Any idea where the problem might lie? I'm kind of leaning towards a relay being bad or loose, but without the service manual I'm having to guess which one(s) it might be.

I had to bug a buddy to get to work, so I didn't have time to put a VOM on anything to verify any voltages.

Thanks in advance for your time!

Rich
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post #2 of 7 (permalink) Old 07-05-2011, 11:39 PM
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Do you have tuneecu ? If not you should get the cable and download it. Chances are pretty good if you reloaded whatever tune it's running that would fix it. Probably a ECU glitch that a reload would take care of. The tuneecu site has every stock tune there is.
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post #3 of 7 (permalink) Old 07-06-2011, 12:36 AM Thread Starter
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Thanks for the quick reply!

I don't have the Tuneecu cable, but I'm more than happy to take your suggestion, so I've ordered one from Amazon. I'll download the software and give it a try when the cable shows up.

Ordinarily I would let the dealer tinker with it, but both Triumph dealers are all the way across Houston from me and I'd have pay someone to ferry it to the dealer and impose on a friend to drop me there when it's ready. Much quicker, and cheaper, (if you don't count the time the kind souls here take to advise me), and perhaps more convenient to handle what is, hopefully, a minor repair myself.

Since you were kind enough to be patient with someone who's a relatively inexperienced rider, do you happen to know if the ECU losing its tune is a fairly common occurrence? BTW the TuneECU threads on this forum totally rock with good info.

Thanks again for your hard earned wisdom.

--
Rich
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post #4 of 7 (permalink) Old 07-06-2011, 12:49 AM
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I believe it is fairly common. Not to the point it's going to be a reoccurring problem or anything. But i figured just as you said that since it won't start this is something you can try first before paying a huge fee for a tow. Tuneecu also can read error codes if the engine malfunction light is on and tell you whats up if it's not a map glitch. I and anyone else here will be happy to help you get tuneecu running once you get the cable. But there is a dedicated tuning forum here too where there are guys that really know this stuff better than I or most of us in the Tbird forums. Check it out and also consider posting there when you have tuneecu questions because they will be able to answer quicker and better. Go here.... https://www.triumphrat.net/ecm-and-fi...ps-and-tricks/
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post #5 of 7 (permalink) Old 07-06-2011, 08:31 AM
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Sounds like an electrical issue, not a tune. Check all of your connections to include grounds wires. Something might have come loose.

Dude Extraordinaire
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post #6 of 7 (permalink) Old 07-10-2011, 02:12 AM Thread Starter
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Got the ECU diagnostics cable in Friday and downloaded TuneECU. It complained about Error Code P1690, CAN Bus Malfunction. Without any other clue on where the bus might have gone wrong I went ahead and cleared the error code, hit the ignition switch and the bike started right up!

I'm still concerned that my CAN bus has an intermittent short or loose connection, but I'll have to do more research before I can figure out where that problem might be.

I went ahead and uploaded a non-crusty tune, (one that TuneECU actually recognized), while I was at it and it even seems to idle better once I went through the reset TPS procedure.

Thanks for excellent suggestion. My donation to the TuneECU website is on the way.

Thanks again,
Rich
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post #7 of 7 (permalink) Old 07-10-2011, 01:23 PM
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Great ! Can bus i believe is the ECU's method of talking to the 02 sensors if i'm not mistaken. Could be that one of the sensor connectors wasn't making great contact and is a bit intermittant. That would account for the way it threw a code then didn't once cleared. If it does it again i would unhook the connectors and shoot some contact cleaner in them the re plug em. They're kind of a pain to get to, and it would be hard for me to explain how, but it's a real pleasure trying to get them unplugged. I took mine off and am running a custom tune that has the sensors turned off.
And yes, a donation to tuneecu is possible. They have a donate button on the site. I donated myself because i could not see NOT doing so when these guys have created and given away such a great app that is like the $500 tuneboy but costs $0 ! I wish everyone would dontae to them, as they not only deserve it but it would ensure further improvement and support.

Last edited by dazco; 07-10-2011 at 01:25 PM.
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