Triumph 2003 955i Cutting Out When Throttle Blipped.

You’ve not changed the tyre valve caps!
Seriously, you’ve done everything possible except the ecu itself.
That's the only logical thing left by the looks of it.
Confused is entirely apt sir!

 

I bought a new ECU for my 5000k mile 955i about 3 years ago from Fowlers of Bristol. They come without a map, Clive Wood put a map on it for me but you can do it yourself with a laptop, OBD cable and TuneECU software which is free to download. Normally people have all sorts of negative comments about TuneECU, but as ever, normally from those who have never used it. I have, found it pretty good and didn't have any issues. The OBD cable can be found very cheaply on eBay, I think I paid about £10 for it.

I wish you good luck, I had a similar headache with mine and it gets really frustrating. Mine had a different problem but the ECU did fix the problem after Clive said it wouldn't. I'm not knocking him, he was as helpful as he could be but I was glad I stuck to my guns and replaced the ECU.

It could be worth just downloading a new map on to your existing ECU, for the cost of the cable its worth a try and quite fun to mess about with. It made me feel like Rossi's crew chief.

 

Try Fowlers of Bristol, I think mine was £400 ish...

 

Deffo second hand.
I wouldn’t pay that much (£400) just to see.
Fleabay!!!

 

I was tempted but then I thought that if it doesn't work I still don't know if its the ECU. I had been through a similar time to Merc85 and by that stage you'll do just about anything to get the Bast**d fixed!!

 

You’re pretty unlucky if it’d have the same error tbh!

 

Tps? Does it run on all three at idle check the temperature of the headers and maybe rebalance the throttle bodies

 

Have you checked the CO level? Done a TPS reset after balancing the TBs?
The 955s are normally set to run lean at idle but if you’ve changed the map it could now be over fuelling which is why it’s cutting out.
Other thing could be that No1 TB has been adjusted at some point (it should be the datum) and they’re all now out of tune.
Could be lots of reasons for the problem but it certainly sounds fuelling related rather than an ECU problem. That’d be the last component I’d look to change

 

This probably sounds daft but my T509 had an erratic tickover which is now fine after I adjusted the slack in my throttle cable.
I had taken it all out coz thats how I like my bikes, with instant go, but had to leave a bit of slack.
I see you changed the 3 IACV hoses or I would have said there may be a leak.

 

Have you checked your on the right map? If p o took off an exhaust before he sold it then that could be it. You have all the tune ecu gear so Triumph Owners Club or tune web site should steer you towards which map is the right one for you.

 

Small air leak????

 

Fix: Don't blip the throttle.

Ok, ok, I'm leaving . . .

 

Heating the rubbers may cause them to slacken.