Hello from Tokyo. I've been reading this forum ever since I bought my car, but its my first time to post., my VIN# is in a different format when I tried to register, now it seems ok
I have the exact same problem, engine stalling when ever I downshift (i.e. push in the clutch pedal).
First time I drove the car, I had the engine stall when downshifting from 3rd->2nd, car just push-started it self. I tried to believe it was just one feature of this high-tech car.
but one day, I was almost rear ended when I downshifted while going up hill. The engine stalled, and the car just didn't have enough kinetic energy to push-start itself.. I pushed the clutch all the way in, trying my best to maintain speed in neutral. I waited another fraction of a second and the engine started revving again, but have decelerated to 20km/h or something till I could accelerate again (speed limit was 60km/h=35-40mph or so), that was almost a complete stop.
I tried to determine whether the car was malfunctioning or not. I cleaned the intake, adjusted idle rpm, got a brand new 12V battery, but the problem didn't go away. I just got so used to driving it as is, so I decided to find out what was really happening, and decided to take a 3000km=2000mile round trip from Tokyo to Kyushu, this is what I learned.
when decelerating at 3rd,4th&5th gear, releasing the throttle engages fuel cut mode, and continues until 18km/h (600rpm in 4th). Push in the clutch anywhere in between 1200-600rpm, and the engine stalls being absolutely no fuel being injected. This won't happen when auto stop feature is disabled (A/C on, outside temp is too cold, engine's warming up, IMA recal, etc).
sometimes, the engine would just restart it self at very close to 0 rpm's, but when it doesn't it needs help of the IMA motor to restart. At the exact moment, when the gear's in neutral (what happens when changing gears) restart is not performed.
When in neutral, with the clutch pedal pushed in, the auto-stop indicator stays off. Releasing the brake pedal, and putting in any gear won't restart the engine. Pushing in the throttle few times, shifting 2 times (like 3-N-3), turning the key does restart..
After speed goes under 31km/h (19mph or so), the auto-stop green light comes on, and only the battery alert stays on, until a complete stop or a restart.
I just got so used to driving it, to avoid this problem I touch the throttle very slightly to exit fuel cut mode before I push in clutch at any time. Most of the time, that means heel&toe shifting. So anytime I let anyone else drive, I have to leave A/C on which kills fuel consumption :X
Obviously this was not a normal behavior, so I took it to the dealer last week. The mechanic told me he couldn't find such problem on honda's online database, and this was the first time. Thats not unusual, because insight is the second worst selling car here, maybe less than 500 of a manual sold in 4years.
He told me there was a problem with EGR causing stall on some other Honda car, so I had it replaced under warranty. I just drove it home 120km today. The car felt a little bit easy-driving than before, but the problem didn't go away .
Everything else is perfect on the car, 2000 model bought used in like-new condition, and now have only 22000km on it. I suppose there is something wrong in one of the 3 computers. Are you people having the same problem as I am? Have any of you had the problem fixed, or diagnosed what was really going on test driving with something like laptop+OBD2? Any reply would be very helpful.
Sorry for a long post, and thanks to everyone participating in this very imformative site.