Engine cutting out at speed.

StuartSF2015 · Jun 13, 2022

Calling on the 961 collective, I need help to diagnose and find a fix, if I can for, for a gremlin occurring on my 2015 SF.

On a recent long trip my engine would cut out at around 4300rpm in 5th gear. It happens consistently when gently accelerating and decelerating passed this engine speed, but only in 5th Gear. The cut out only last about 1 second and the engine starts again. I can ride around this by accelerating and decelerating more enthusiastically.

However, what is causing this? Throttle position sensor, ECU glitch or something else? Your help and/or advise would be greatly appreciated.

Thanks in advance.

Shelby-Right · Jun 14, 2022

Hi , Stuart, I haven't got a 961 , make sure all your grounds are good , ecu's can do funny things with bad connections , is it losing fuel pressure ? Standard car injection is 3 bar , pump relay ? Dodgy fuse ? I had a Mazda car that hesitated a lot, then one day it died and that was the cam position sensor . Cheers

TonyA · Jun 14, 2022

Hi Stuart , Your 2015 probably has a SC Typhoon ECU so a SC Delta interface box/cable laptop and free software would be helpful for diagnosing. I however had a similar experience with a tip over sensor going bad on my 2014 Sport. The motor would cut out when I was on the freeway and happened to be in 5th gear. I put this down to chance and some resonant vibration this bike is know for. If you don't mind buying some parts to try and see you could get to the soultion this way. Also the suggestion about checking connections and grounds is free . Look at the ground points on the engine case and frame under seat . The main fuse under tank (check connection and ziptie fuse) and battery cables have had known issues . If this problem is consistent , that should be helpful to resolve it.

StuartSF2015 · Jun 15, 2022

TonyA said:
Hi Stuart , Your 2015 probably has a SC Typhoon ECU so a SC Delta interface box/cable laptop and free software would be helpful for diagnosing. I however had a similar experience with a tip over sensor going bad on my 2014 Sport. The motor would cut out when I was on the freeway and happened to be in 5th gear. I put this down to chance and some resonant vibration this bike is know for. If you don't mind buying some parts to try and see you could get to the soultion this way. Also the suggestion about checking connections and grounds is free . Look at the ground points on the engine case and frame under seat . The main fuse under tank (check connection and ziptie fuse) and battery cables have had known issues . If this problem is consistent , that should be helpful to resolve it.

Thank you Tony, certainly good food for thought there.

cliffa · Jun 15, 2022

StuartSF2015 said:
Thank you Tony, certainly good food for thought there.

Triumph T2502405 (Switch , Fall Detection)

Gojuu · Jun 15, 2022

Before you buy the cable @TonyA suggested, it would be good to know from SCS if you could use this with it:

Delta Log Interface | scs-delta

The brand new Delta Log 2 interface is a compact and affordable communications cable and logging device in one. Offering all of the functionality of our standard CAN bus to USB interface but with GPS and 32GB of onboard data storage . Logging up 70 channels at up to 100Hz this convenient item...

www.scs-delta.co.uk

Being able to leave it connected whilst riding would give you pretty accurate data for a tilt switch or other sensor.

City Garage · Jun 15, 2022

Gojuu said:
Before you buy the cable @TonyA suggested, it would be good to know from SCS if you could use this with it:

Delta Log Interface | scs-delta

The brand new Delta Log 2 interface is a compact and affordable communications cable and logging device in one. Offering all of the functionality of our standard CAN bus to USB interface but with GPS and 32GB of onboard data storage . Logging up 70 channels at up to 100Hz this convenient item...

www.scs-delta.co.uk

Being able to leave it connected whilst riding would give you pretty accurate data for a tilt switch or other sensor.

NEEDS TO SEE IF HE HAS A SWITCH FIRST. THEN STATIC TEST THE SWITCH BEFORE ANYTHING. SORRY FOR CAPS

Lincolnshire Poacher · Jun 18, 2022

Stuart remember my dodgy main fuse….? That had insulation rubber within the fuse holder and cut out all power….

StuartSF2015 · Jun 18, 2022

Lincolnshire Poacher said:
Stuart remember my dodgy main fuse….? That had insulation rubber within the fuse holder and cut out all power….

Yes I do and have had the tank off this afternoon to check all the connections hidden within.

Stephen_Spencer · Jun 18, 2022

Took me a long time to work out that my intermittent engine cut out was due to dislodged cable ends in the positive terminal cable. There were two cables (badly) secured into a single non insulated terminal end - bad practice of course. Worth checking but can’t imagine it would manifest at the same revs each time, nor in the same gear. Hope you can pin it down quick Stuart - I know how frustrating such a fault can be.

Claudio · Jun 19, 2022

I have had similar problems, since I replaced all the relays it hasn't happened yet

StuartSF2015 · Jun 19, 2022

Claudio said:
I have had similar problems, since I replaced all the relays it hasn't happened yet

Claudio,
Interesting. I have the tank and saddle of at the moment checking electrical connections and I might just change them all, because I can and see what transpires when it is back together.
Thank you.

Engine cutting out at speed.

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