2007 6 cyl Accord EX-L sedan, 56,000 properly maintained miles. No check
engine light, no obvious loose/damaged wires or hoses.
On morning cold start in Park-- catches immediately with RPM about
1100-1200. Idle is a bit rough-- though accelerates smoothly up to
3000-4000 in Park. After a few minutes, RPM drops to around 800 or so,
idle still a bit rough.
The problem though is driving off at any point in these first few
minutes, car chugs/stumbles right before up-shift point. The colder the
outside temperature, the worse it is. After driving for several more
minutes though, car then operates normally until restating the next
Also, after a cold start, if I let it idle until the thermostat opens
and the fan cycles on, it drives off normally.
Any idea what the problem is?