Just wondering if anyone has had this experience.
For a week my S had a dead battery and I just put it in a few days ago. It continued to rain here in Nor Cali, so I just put in the new battery and let it sit.
Today the weather outside was too nice to resist, so took out my S.
It fired up all fine and all, but a block down at the stop sign, I made a full stop and the RPM had 2 bars and it was choking and it stalled! I was in nuetral.
I started the car again and again it was shaking and RPM had 2 bars, I gave it gas and drove.. It continued to shake every time I stopped. so I kept on giving gas at traffic lights. Maybe after 5 more full stops, it seems to be fine, but
This has never happened before and the only thing is the dead battery.
I know the dead battery reset the ECU, but will that cause it to stall and choke?
FYI, it's a 03 with 37k healthy miles...
Thanks a lot for ANY information in advance..

 

Its probaly just ecu reset and idle re-learn process... no big deal

 

But would it stall tho? I've had batteries go dead on previous cars but none stalled..
I really hope everything will be alrite especially now that it doesn't have warranty anymore..

 

This is the single WORST thing you can do when it starts to idle low and die. If you do this a lot, the ECU will never learn to compensate on its own. When it hesitates, let it die. By trying to keep it alive, you are inputting all kinds of throttle positions that confuses the ECU. A change in climate or weather or other parameters (eg. new battery) can cause this low idle situation. What you have experienced is not new for S2000s. Just let it learn on its own.
ps. Why are you in neutral at a stop sign? If you are coasting to the stop sign in neutral, this will also contribute to the problem not to mention that it's not safe driving technique.

 

Why is this an unsafe driving technique? What should we rather do?

 

The operator of a manual transmission car should never coast in neutral. The car should be in gear whenever possible. As you speed up, you "upshift". Conversely, if you slow down, you "downshift", always trying to keep it in a suitable gear. You have less control over your car when you are "freewheeling" in neutral. This is something that is taught in any driving school that teaches manual driving.
The only time you would be in neutral is when you need to have the clutch up and you are not moving, like when you are warming up the car or sitting for a long period of time at a stop light. As long as the car is moving, it should be in the correct, corresponding gear for the road speed. If you are stopped for a very short time, you should be in 1st, clutch in, so that you are ready to move off. You should have learned this when you learned how to drive "stick". If you were not taught, then whoever taught you, was remiss. As you get into driving "stick", you should also be learning things like "rev-matching", but this is a topic of a whole other thread and has been posted numerous times here.
The above is a matter of proper driving technique. Now, for a mechanical explanation .................................
There are example of cars where the speed signal is interpretted along with all the other sensors that provide information to the ECU. In some cases, when the ECU sees road speed and "neutral" and ZERO throttle position, this can confused the ECU into doing odd things. These things can include a "hanging" rpm or extremely low idle speed leading to a stall.

 

hmmmm....
then should i just reset the ECU again? and let it idle low and die?

 

NO! Don't use the ECU reset thing too freely. It has to be given the opportunity to learn. Every time you reset it, it has to learn all over again. After a few episodes, it should stabilize if you're not messing with it by "helping" it. If it doesn't resolve itself after a few days, you may need to look into doing other things. Post back here then if it continues into middle of next week.

 

will do!
Thanks A LOT for your help!!

 

[QUOTE=xviper,Dec 24 2005, 06:18 PM]The operator of a manual transmission car should never coast in neutral.