got a call from a friend , so I dropped around

history of bike is...
initially seemed like a TPS issue as it was iratic at certain throttle points
he put it away for a while , then the battery died so he renewed that
BUT
owner said he renewed the battery, but with an optimate connected to save loosing the ecm ?
I was wondering if it could have spiked the ECM ?

TPS as per 08 onwards has been done
plugged ecm spy into it & no fault codes are showing at all ?

it wont start , with a fully charged battery
ignition switch on pump cycles , but then it coughs as the starter is turning over

the injectors have been cleaned as they were not spraying correctly & now spray mist correctly

I was thinking if someone has a spare ECM to try swapping it over ?
cant see any loom damage at the headstock area

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Feros Ferio

how old is the fuel ? this modern stuff don't like to sit around for to long before it starts going off, and cloging up the works, filters , injectors , pumps . a pressure gauge to check its reaching correct pressure would be nice to know that fuel system is ok , and a fresh tank of fuel woudn't go a miss.
with the " it was iratic at certain throttle points " before being " put it away for a while" did it fouled the plugs and needs a plug change , and once it does start, you still need to find out what the original cause of the "iratic at certain throttle points" .

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Buell Ulysses XB12X 06/08

Cheers Barney
Sorry I should have said
Has had new plugs & fresh fuel pressure is good
I was thinking if the TPS sensor may be defective as it will run if you catch it with some throttle but cuts out if left

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Feros Ferio

Sounds like you're on the right track to me Don.
If everything else seems ok & it sounds like it is, it has to be one of the sensors. Plus your initial idea/thought that it may be the ECU, would also point me to the sensors before the ECU.
Good luck & well done so far.

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Ride Safe & Stay between the hedgerows.

or could be air leak ....manifold , or not sure if the 9 is same as 12 with blanking plug around throttle body area .

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Buell Ulysses XB12X 06/08

forgot to say it's a 1203cc

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Feros Ferio

What’s the fuel pressure?
Are the injectors connectors on the correct injector?
Did he replace the TPS?

I very much doubt it is the ECM.

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08 Specialized Langster

Nutah Hopefully get it up and running soon with the help of Dr Pash

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Buell Ulysses XB12X 06/08

...continued

fuel pressure is 43.5 edited.. it's supposed to be 49/50psi

tps reset done as it's an 09 , but no different sadly

have suggested a trip to see Maz

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Feros Ferio

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Buell Ulysses XB12X 06/08

Hi, Did you resolve the TPS issue - I am having similar issues that point to the TPS. If you replaced the TPS where did you get one from and have you part number/manufacturer details

You're on my doorstep !

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Mithered ta death.
92 MB
96 S2T
98 S1W
00 M2
01 X1
03 P3
10 CR

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Feros Ferio