EXPENSIVE PROBLEM

[LAS VEGAS DAVE]

I've had check engine light come on mid ride, for other stuff, but for P0638 that time it came on at startup - which is what pointed me to the movement of the secondaries as these go through a cycle when you switch on ignition.

It might not even be the same issue again - could be MAP sensor fault since the had to disconnect vac tubes to change out TB'S, for example. Chances are though it will be TB related.

Have you considered investing $20 in a lonelec cable for tuneECU?

I still have a flip phone, don't text, etc. but I actually would like to learn about the tune ECU and what it can do if I ever meet someone with a Rocket that could teach me.

 

[EasTexRIII]

When the warranty book only pays a tech 1.75 hours for something that takes them 3.0 hours and a tech should be able to complete a procedure in about half the time the regular labor book gives, that tells you the techs get screwed on warranty labor (usually) - that being said, they will get in a hurry trying to make ground on a warranty job & sometimes they will overlook some of the small things. It's probably something minor in the settings that got accidentally overlooked. When you take it back, tell them to test ride it when done & go thru the steps you went thru to try n recreate it. And not call n tell you it's ready until that doesn't happen any more

 

[LAS VEGAS DAVE]

When the warranty book only pays a tech 1.75 hours for something that takes them 3.0 hours and a tech should be able to complete a procedure in about half the time the regular labor book gives, that tells you the techs get screwed on warranty labor (usually) - that being said, they will get in a hurry trying to make ground on a warranty job & sometimes they will overlook some of the small things. It's probably something minor in the settings that got accidentally overlooked. When you take it back, tell them to test ride it when done & go thru the steps you went thru to try n recreate it. And not call n tell you it's ready until that doesn't happen any more

I will do that, I already emailed him a copy of my above post explaining what happened. I don't think the tech cut any corners as this particular tech takes much pride in his work. He is a factory trained tech for Triumph and MV Augusta and a few other brands. I think he rode the bike for a shorter time than I did and the light didn't come on, it also didn't come on when I picked it up so nothing was triggered when he rode it. I just tried it again this morning and the light is still on and won't go off so thats the way he will receive the bike on Tuesday. The bike runs good, I took it to 100 mph briefly when I rode it last night and it was smooth and easy to do that, it also does not pop when you let off the throttle, another words it seems to run great.

 

[rocketjohn]

I bet it's simple...I really do.

 

[BigNorm]

I bet it's simple...I really do.

 

[Jag]

I hate to be skeptical, but sounds like a miss diagnosis to me!!

 

[LAS VEGAS DAVE]

I was under the impression that the codes tell where the problem is so how can it be misdiagnosed unless the computer is at fault?

 

[rocketjohn]

Codes don't tell what has gone bad, it tells you what device has a bad reading. Diagnostics is the process of correctly determining what problem can cause the bad reading. Consider a car....you get a code for a gross evaporative emissions control system leak. But is it the fuel tank check valve? Is it a loose gas cap? Or is it a broken line? That's something the computer can't determine...it can only say "I can't pull a vacuum in this system"

Also, engine computers have a priority system....one code can mask other codes that will not be seen until the first one is corrected. It's not designed that way, it's just logical. Related or layered symptoms may have more than one problem, but the underlying codes won't set until the one big problem is corrected, because the computer can't yet see the other problems. And I think that's where you are. The major problem was fixed, and now some minor adjustment is coughing up a code. Maybe it was wonky to begin with, or maybe it was induced by the other repairs....no knowing, but still should be easy to fix.

 

[LAS VEGAS DAVE]

Thanks for the explanation, everything you said makes sense to me. I'm anxious to learn what codes are now showing. I think it will show something other than the codes it
showed that pointed to the TB replacement. The only mods to the bike were D&D pipes and the addition of McCruise. The same tech installed the McCruise so he should know if that could
have a bearing on whatever code is shown. I wonder if the speeds I tested it at (100mph) and the speeds he tested it at which were most likely quite a bit less had anything to do with it.
I have so many questions in my head and so little knowledge of modern FI and computer read outs. My V8 bikes are nothing more than old chevy motors still carbed in a bike and all my previous
bikes never even had FI or a computer. I love the Triumph when I ride it, it seems to be a fantastic bike, I need to buy a code reader and learn how to work it, I don't even know where it plugs in!

 

[geneseo1911]

I will do that, I already emailed him a copy of my above post explaining what happened. I don't think the tech cut any corners as this particular tech takes much pride in his work. He is a factory trained tech for Triumph and MV Augusta and a few other brands. I think he rode the bike for a shorter time than I did and the light didn't come on, it also didn't come on when I picked it up so nothing was triggered when he rode it. I just tried it again this morning and the light is still on and won't go off so thats the way he will receive the bike on Tuesday. The bike runs good, I took it to 100 mph briefly when I rode it last night and it was smooth and easy to do that, it also does not pop when you let off the throttle, another words it seems to run great.

If the light comes on when you turn the key on, i bet something is failing the initial diagnostic when the computer starts up, but is still working 95%. My wild-assed guess would be maybe the secondary throttle stepper motor. Didn't some guys have trouble with those? I would've thought that would be replaced with the TB's though. Something like that would reduce power so slightly that you wouldn't notice with the butt dyno, but the computer could see it didn't make a full sweep.