TPS question/Stumble problem?! - Event Date: January/01/1900 - January/01/1900

Thanks for the forum and advice.

I have an 07, the dash was on the bottom. After a couple of tries I managed to keep in the middle.

Thanks

Brock, EJ, and Jason

Jason,

So do I still need a tech with a yosh clicker box, or can this be done with the PC3 software?

So you are saying that is all you do for an 08? (see below) No jumping wires to set the TPS on the bike?
Has anyone thought of doing a pictorial of TPS setting on 08 Busa (TPS settings for dummies, lol)




For the pc3usb there are no wires to jump.Hook a computer to your power commander with the supplied usb cable.Start bike.Open the PC3usb program on you computer.Click Power Commander Tools at the top left of the page.Click set throttle position.There will be three boxes with numbers in them.The middle box will have an arrow pointing to the left box and an arrow pointing to the right box.The middle number will change frequently but the outside boxes will stay constant.Click the arrow pointing to the left box and the number that was in the center box when you clicked will now be in the left box.Click ok.Disconnect power commander and replace seat.

I am having stumbilng problems like everyone else. So to relieve these symptoms I should zero the tps sensor with the heads up display, then the usb power commander, then have the ecu zeroed with a yosh clicker box? Should I bring the bike to a Suzuki dealer to have the ecu zeroed, or can I purchase a clicker box and do it myself?

Thanks EJ for the reply, I'm so pleased with the service from you guys

white connector...black/white and white/red

OK, I set it to -COO with just ignition on, with the bike running I show - at the top of the scale is this OK? Tried to set throttle to zero closest I can come is 1%  onPCUSBIII any I ideals on what I need to do?

Kevin

Jason, I got everything where it should be.

THANKS!

 

Kevin

 

You should not have a stumble...your injectors may be dirty.

Figured this might be worth ressurecting from the dead...

I am tidying up my StreetSmart Install and overall i am VERY impressed with all the support i received AND the performance of the exhaust...

I am having a minor issue with a surge/bucking at very low throttle between 2-3k rpm...basically if i keep the throttle just a hair open or keep it constant the bike wishes to surge/buck...if i let off or accelerate all is well...

I have set the bike's TPS per instruction (always returns to middle dash after throttle movement), and set the PCIII tps to match the bike. with EcuEditor data monitoring the TPS reads between 1.2-1.9% at ~1150rpm...and PCIII tps reads 1%...if i zero the PCIII tps i notice a stumble just off idle...matching the 2 (PCIII and bike) produces a cleaner move off idle...i also disabled Yoshbox Compensation in the ECU itself...NO fueling changes were made from stock, however the ignition maps i flashed allowed removal of the TRE...

the surge/bucking was reduced by each successive step taken but is still present. WOT feels absolutely amazing...

I'm wondering if further tweaking would resolve the issue, if i am just a wee bit picky (as i can faithfully reproduce the surge/buck over and over), or if further measures should be taken (i.e. injector cleaning, maintenance, etc)...

I will report back after i double check a couple things

I actually tried something not exactly recommended...

It wasn't a ping i was feeling or a lean misfire...so that left one other possibility...

I began to alter some cells within the map...spcifically some 0-2-5% and between 1500-2500rpm. I leaned the suspect cells out 1-2% at a time and verified the change in behavior with road testing. With each successive change the stumble gradually subsided until the present condition in which it is almost un-noticable. I do not plan to make any further changes until i can get some time on a dyno to verify AFR and have the ECU flashed with the tune. I do not wish to reinvent the wheel nor cause any damage. The bike feels much better after the changes.

I will also attempt to locate the MR9/MR11 fuel and clean the fuel system anyways. at ~4500mi it's probably due...

Update:

airbox was removed/cleaned, checked, and i scraped & sanded & removed the foam/adhesive from the K&N foam gastets. Reinstalled stock filter, checked MAP (was loose on the box but vac line tight), checked flapper, checked IAT...everything was fine...

reinstalled airbox, zero mapped PCIII, Disabled Yoshbox compensation the the stock ECU, reloaded Brock's street map into PCIII and the low stumble came back with surging present. Loaded my slightly modified map and the stumble subsided and the surging seemed to be marginally better but i'll say it was the same. cruising is smooth though...just that surge/bucking below 3k at < 5% throttle or so (holding throttle constant).

No response from VP Atlantic as far as distributors for VP fuels. I am in zipcode 16701 if anyone has a dealer list they would like to look at for me.

NOTE: this MAY have something to do with the repairs i made to the header as a result of damage from the previous owner. Primary tubes 2 & 3 were "bottom halved" and had new tubing welded in to return them to smooth. they may or may not be exactly match the 1.690 ID of the tubing as calculated from measurements taken during the repair...but they are better than the nearly smashed shut condition i received them in. - that being the case it is likely the map might need minute changes to compensate or cylinder trim adjusted. just a thought...

Everything was done per the instructions in that document. I've removed the foam gaskets from the K&N and sanded those areas back smooth and completely removed all debris from the airbox. velocity stacks are ok, no holes or loose fittings that i can tell...

VP Atlantic hasn't gotten back to me yet. I'm gonna make a phone call later today...

went to the stock filter immediately after the exhaust was installed.

I had initially left the foam 'gaskets' that came with the K&N in place but have since removed those and sanded smooth any remaining adhesive residue and then cleaned the airbox of all debris and reinstalled the stock filter again.

i finally came to an incident about 5 days ago...bike ran fine in the morning and then wouldn't start at all that night. i checked plugs and they were fouled and wet. i cleaned, dried, and reinstalled and the bike still wouldn't fire...same condition...

i pulled open the service manual and it mentioned that if the plugs were wet to try moving one heat range hotter...which is a CR8E...i installed a fresh set of them and bike took off on the first roll and has ran it's absolute best ever since. I have even reloaded the unmodified original brock's map and the stumbling/surging issue is completely GONE...

I cannot sense any misfire/ping/stumble/anything anywhere in the RPM range. bike feels A LOT stronger than it ever has...

I am going to pull the plugs this weekend and check the condition to verify nothing is out of norm...

The only thing that bothers me...even if the plugs check out fine...is i do plan to spray the bike this year...i'm wondering if then i should switch back to CR9E's just to be safe...or if running 93oct plus pulling timing would be enough to keep it under control...either way it seems like the issue has been resolved for now

Hey brock Yoshimura clicker box ware i can find one

Yes, especially since you had that sensor replaced, our maps are set up for it to be set at zero.