This morning is cold, around 6C at outside temperature. When I start the my C32, everything is ok and the engine idle is around 1000-1200rpm. It keep steady running. Then I put the shift to N, it still running smooth. After 1x second, I put it to "D" shift. The car just started to move but it stalled! The dash show up a "battery / alternator visit workshop". Then I turn off the car and restart again. Everything is ok. Then I wait around 1 minutes and shift to "D", it run smooth all over the day.

Should that be the engine oil, coolant, engine fluid temp is too low and I didn't did the full engine warm up and cause the stall?

Please advise ?

Thanks

no i dont think your oils,fluid would cause a stall. sounds more like a airflow/sensor problem

Do you have a checking engine light? I'm wondering if the car has thrown any codes. That would greatly help. There are a number of things that can cause the car to stall out.

(Though I'm wondering if it could be your CPS sensor)

that sounds like a MAF sensor problem.

I would first think it was an MAF sensor problem, but I have yet to see one produce the alternator failure screen! I would check up with the MAF, check the codes, then check the alternator/battery. Its deffinately an odd problem. Check the obvious, then let us know what shows up. Is this a constant problem? and were there any symtoms before this happened?

adam

IAC if they have them.

Another possible curprit could be the crankshaft sensor going bad. That would trip a CEL.

C32 doesn't have a MAF and a broken CPS doesn't go out when cold.

pull the codes and check throttle position sensor if it happens again.

Problem "seems" fixed after......the throttle **** fully cleaned.

This is the China New Year that all the garage, sub-dealer are closed for at least one more week until next weekend. There is no parts for sale at this moment. WTF !!

I have some spare time in this morning so I want to locate the MAP sensor first for the later replacement. When I removed the Y-pipe, I found that the throttle **** inside was full of carbon dirt and keep oily. And there is no gap between the throttle **** and body after fully closed. The gap was jammed by those carbon stuff. So I started to clean them by WD-40 and cloth rub. After deep cleaning work the gap appeared again. Then I installed everything and use electrical contact cleaned to cleaned up the electrical plug too.

Then I start the car, warm up for 10 sec and put to "D" shift, it run without stall or even no weak RPM !!! Everything resume back to normal. Then I leave and test again again night (after my work). It is ok too ! Very good !

Hope I have solved the problem because it is not very cold today, just around 12-13C. I m afraid it will have the problem when it drop to 5-6C again !

I have post some pics for sharing

Some more photo

Good job fo being brave. And Happy New
Year!

Thanks Lenin,

Btw, I didn't tried the high speed test, I dunno how it's work.
For what I did, will it hurt the TB?

Thanks