I have faced a Problem in my Honda 2005 Automatic, I started my car in Parking, after 15 Minutes, I saw that it was turn off.
i started Car again with no problem.
Same problem happened yesterday but i was on signal and my car was in Neutral state.
i feel no other problems.
Car runs with : at Parking/Neutral - 800 RPM at Drive- 600 RPM
I am not an expert on this but here are my thoughts....
1) Your car may need to "re-learn" its idle procedure. Do you know the idle re-learn procedure (especially if your battery was disconnected or your throttle body was disconnected)? From member "robbiej":
Do the idle learn procedure whenever you do any of these actions:
-replace ECM/PCM
-Reset ECM/PCM
-Update ECM/PCM
-Replaced or disconnected battery
-Replace or clean throttle body
-Disassemble the engine or the transmission
Procedure
A. make sure all electrical items (a/c, audio, lights, etc) are off.
B. turn the ignition switch ON (II), and wait 2 seconds.
C. Start the engine. Hold the engine speed at 3,000 rpm without load (in park or neutral) until the radiator fan comes on, or until the engine coolant temperature reaches 194 F (90 C).
D. let the engine idle for about 5 minutes with the throttle closed. (NOTE: if the fan comes on, do not include its running time in the 5 minutes.) http://www.youtube.com/watch?v=K8VfHkMmeZA
4) Check the air intake hose to make sure there are no cracks. You may have to gently flex it to see if there is a hairline crack. There are a few DriveAccord members that had cracked intakes and had to really look to find those cracks. http://www.driveaccord.net/forums/showthread.php?t=59315