"cough" at 3k rpm and then dead - s4r

[Howie]

Does the TPS have rivets or screws?  If it has screws it needs to be adjusted.  If it has rivets it is set by the software.

[♣ McKraut ♣]

I'm sure you're right Dave.

There was some discussion of which ecu he has, and I don't know when it became a software item.

bobby at desmo porche (the place that reflashed the OEM ecu) had told me i have a 5AM ecu.  the vdst also identified it as such.  now to do some searching for pics of exactly what it is i'm looking for location-wise for these screws or rivets.

[♣ McKraut ♣]

starting the bike the past several days has been much improved... seems to start on the first crank or two pretty easily.  as for coughing or stumbling, i haven't been able to reproduce it since adjusting the trim.  i tried with 15, and that seemed decent, then played with 30 briefly (that had flames coming out the exhaust), and then went to 17.  took it on a decent ride yesterday, and even in the hot texas heat, chopping the throttle hard in city riding, i couldn't get one single pop or backfire.     i'll continue to play with the trim numbers (i've heard people say push the trim up until it stumbles then back it off a bit) to see what feels the best.  but for now, i'm just happy that it seems to start right up, and run great (no popping at all!).  i guess i'll also have to monitor my plugs periodically just to keep checking on what color they are to make sure it's not *too* rich.

[devimau]

buying a gastester would be a nice investment to make sure you're spot on, it's about $250.

[DucHead]

Does the TPS have rivets or screws?  If it has screws it needs to be adjusted.  If it has rivets it is set by the software.

I have the same bike/year as the OP, and mine's a non-linear TPS with two phillips set screws.

[♣ McKraut ♣]

looks like pompetta is dead on with this...just looked closely at my setup, and it looks just like what i'm seeing at brad's site (http://www.bikeboy.org/ducati4vthrottleb.html).  looks like i may just take it to a tech to get it done right since this just got quite a bit more involved for someone that doesn't have a garage to work in.   

left side (i know these pics are horrible)




right side

[DucHead]

Too bad you're not closer.  I made a pigtail to connect the TPS to a multimeter, and I have a garage.  

That said, the paint is still on the adjustment screws, so perhaps the TPS setting is OK.  I doubt the VDST electronic "adjustment" did anything at all.

Perhaps Brad or someone with more than my piddly knowledge will chime in.

[♣ McKraut ♣]

Too bad you're not closer.  I made a pigtail to connect the TPS to a multimeter, and I have a garage.  

That said, the paint is still on the adjustment screws, so perhaps the TPS setting is OK.  I doubt the VDST electronic "adjustment" did anything at all.

Perhaps Brad or someone with more than my piddly knowledge will chime in.

i appreciate the sentiment man...  and i hardly call what you know "piddly"... i've seen you do all kinds of stuff on this board