I haven't really posted on this subject, but I think I've read all the threads concerning it. crowstone has some good points. Just because he is new to the forum doesn't mean he is new to the mechanical realm of automobiles. On the contrary, he sounds quite knowlegeable. I think he has some good points. To back him up... The CVT would function completely different from a manual. The way a CVT starts from 0 - x is by an automatic clutch. It grabbs its timing from the engine, A-Trans and the comp. The manual trans has the element of human error. I for one haven't been sold on any of the fix ideas, apparently neither have any of you. He's got good ideas. It's another option for investigation.

crowstone, your theory makes sense to me too.

Frank

 

I have to side with crowstone on this one at this time. I am an electrical engineer and computer scientist by degree, although never really touched the subject in the real world. But what crow had said is very logical. It is a very difficult fix. The software they are coming out with would only be a bandaid solution at best. The real problem will still be lurching somewhere. Thinking more of it now it has I think a lot to do with air intake, maybe even in the head system. Don't know for sure but crow sound logical to me.


Suggestion: why don't we each try one different hardware change with the same ver software and see who makes the change that eliminates the problems. Just a wild thought.


Peter

 

>>Nuvolari,
>>
>>Fuel would be considered hardware...one of the timing parameters is fuel...could be contributing to the problem but isn't, in and of it's self, a solution...if fuel was a solution the members of MCO would be aware of it.

The service advisor at my dealership told me some of their customers got some relief from this stalling last winter by switching to a lower grade gas. They were guessing that perhaps a proportionally lower amount of the EPA mandated alcohol made some difference.

Unfortunately in some large urban markets the alcohol is not only used year round now, but actually increases in summer, or so I was told by the mechanic at my local gas station.

 

I still don't understand why, if it's hardware, the problem increases/comes on immediately after the software upgrade--god help me, I want to! I'm trying! I'm... needing an engineering degree

 

Omtoast,

The move from the flat low end, or hesitation/stumble, to the apparently grotesque 2000 rpm stumble is a product of software…but I believe the origin of both problems is hardware related…were I trouble shooting this problem I would start with sensors…if the air sensor is a butterfly rheostat that would be first.