Modern Vespa

Yikes!

And it is easy to upjet or adjust the fuel/air mix a little to compensate on a carb.

is sunny your old gts or your hpe? and did you get an check engine code?

Sunny is my 2013 GTS.
I didn't connect to a code reader.
I'll visit my friendly dealer and see what his box of tricks says...

For posterity: '20 HPE 'tech: ten days ago with tank at 6.5L from full, and having sat for ten days, started with a rough idle and tendency to stall. This persisted for the evening, and for a short ride a few days later. Same evening arriving home, I let 'er sit, idling, for observation. Check Engine Light came one after a minute - 90 seconds. A couple days ago, I lifted the pet carrier and poked, prodded, tugged, and lifted wires and hoses in and around the engine. Started 'er up. Steady idle, but CEL persisted. Shut 'er down. Today, started 'er up, to a CEL. Went for a ride. Got a phone call. Parked, shut off. Got voice mail. Started up. CEL extinguished, and rode away as if nothing was ever wrong. Did I poke a bad connection? So, where would I locate an O2 sensor, anyway?

the o2 lambda sensor is in the exhaust manifold near the bend where it goes into the cylinder head.

the cel light did come and go for me but mostly persisted.

Hey steelbytes, is fixed?
Did you need To program the new throttle body?
I am happy for youuuu👌✌️

yes the replacement throttle body fixed it. no programming required (note: it was 2nd hand).

Surely you had to program it to your keys?

it was a 2nd hand unit that came with the blue key (sadly no brown). so no programming to make it run.

and being an hpe ecu I can't reprogram it to a different key. I'm currently hold the 2nd hand blue key next to my old key in the lock while turning the ignition. (actually its a copy of the original key but with no chip in it)


I do understand that a brand new ecu would need programming to match a set of keys

Thanks for your answer!
Maybe if you go To a specialized shop they could do some bushings To the old throttle body shaft
😜

Hello steelbytes, do you have afthermartket exhaust?
Cheers

Yes, but that won't cause the gap and movement around the butterfly.

I allready see that you have an arrow,
I bought the same exhaust but not installed yet…
I want to ask you, mine is euro 4 cat converter is removable, can i use without cat? Without trigering the ecu cel?
Did the bike run betther without cat?
Thanks i hope you don t mind answer this questions

I did run it with out the cat but just sounded too angry (no cel). so I added the cat which is such a large diameter that it's not very restrictive compared to oem. unless the bike was tunned (ecu remap etc) I probably wouldn't gain from having no cat

Many thanks, love your answer took me any doubts!!
By the way…
Is your bike still ok with the second hand throttle body?
I hope sooo

yes ...

but I have recently started to notice it being slower than normal to drop to correct idle rpm when starting the bike or stopping at the lights. so not yet a problem but I have a hunch in another 10,000km or so it will reach the same state


see T̶h̶i̶n̶k̶ I've a̶l̶m̶o̶s̶t̶ worn out another throttle body

I think that is the normal wear of the body flap!
But for a second hand piece… it last almost as the original!!
many thanks for your help!
Love your answer's help me a lot
Best regards my friend