off idle stumble

macca

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I've been running a Remus Titanium can on my S10 for about 3k miles sans the DB killer , and I loved the way it sounded loud but not too loud,to my ear? ( probably quieter than my stock canned Ducati superlight though that could be 20yr old cans and I suspect Italian interpretation of noise regs in the 90s helps) . A slight fly in the ointment was the S10 has had a slight stumble just coming off low rpm that seemed slightly worse in T mode/ It didn't bother me that much as I was in exclusive S mode due to my rides being for fun or longer out in the country side with little urban crawl.
A change in works management philosophy meant I had to return to working in the nearest office :/ and not home (after nearly 8 years ! ::009:: ) so I press ganged the S10 into the urban crawl , 18miles of it though the local City (ugh) . As I had returned to TMode due to snarly traffic the stumble became annoying in the crawl especially filtering upto traffic lights when it was a little tight space wise . Anyways To make me more stealth /less obnoxious as sometimes I had an early start and didn't want to upset neighbours too much I tried refitting the Remus's Baffle . The reduction of noise became strangely compelling in the commute and the buttery smooth pick from idle was a very pleasant bonus.
So if yours seems a little off at low RPM after fitting a through exhaust can, try it with the DB killer in. Not sure if its reduced what I perceived to be a better top end pull with Remus uncorked as I've just been riding the low end torque wave sofar and that could have been a noise induced placebo or the engine climbing out of the flat spot making the upper rev pull feel better on my Butthole Dyno.
Note mine is unflashed.
 

Rasher

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The flash cured my stumble.

Air screw mod could be worth a try as a cheap solution, but the Flash does so much more and would be a bit like getting a new bike ::008::
 

howie ronic

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Off idle stumble drove me crazy slo motoring off road.....until I drank the magic elixir of the avc8130 flash. Highly recommend you give Anthony a call. Best money I've spent so far. Stumble is gone and rocky roads have me smiling again.
 

ec90t

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I just fitted a Yoshimura RS4 can and I have the off-idle stumble in S mode, but my T mode is just fine. Maybe I need to think about the reflash since I'm not going to remove the Yosh .
 

racer

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Back out the right throttle body air screw 3/4's of a turn then rebalance the throttle bodies with the left air screw. Then proceed to check out. That is all. ::012::
 

avc8130

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howie ronic said:
Off idle stumble drove me crazy slo motoring off road.....until I drank the magic elixir of the avc8130 flash. Highly recommend you give Anthony a call. Best money I've spent so far. Stumble is gone and rocky roads have me smiling again.
Thanks for the plug!

I see the OP is in England. It might be easier for him to try a more "local" approach, although I do think I could help.

ac
 

~TABASCO~

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racer said:
Back out the right throttle body air screw 3/4's of a turn then rebalance the throttle bodies with the left air screw. Then proceed to check out. That is all. ::012::

This is what I was going to also say..... X2... Sync the TB's...
 

macca

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Some useful stuff but since I fitted the db killer I don't have an off idle stumble anymore , though I do believe its a fueling issue introduced by a freer flowig can , even though its after the CAT so s remap coud help but only if they knew worked in that area to specifically address what a can did to the low rpm small throttle opening fueling in the 1st place , my guess is its goes a little lean with a can rather than rich .
Note I was just posting for others who may find similar solace in my free (to me ) fix . Also not sure why I'd need a TB synch, if the db killer solves it as if the throttles were out of balance they still would be post db killer fitment since it affects both cylinders exhaust flow.
Got to stretch its legs a little today ain T-mode nd its nice linear climb from pick up to national speed limits (conditions permitting officer) so happy bunny again and the chugability is back so no need for higher revs/clutch feathering when filtering. Will re test S mode when the local fog and damp conditions disappear, it looks like for me losing a bit of exhaust bark is a small price to pay.
 
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