I have a 00 Accord SE that started stalling and will not idle. The car runs great otherwise. I took it to Auto zone and was told it had a MAP sensor code. I changed the MAP sensor with no change. I also have a P1399 code.
Anyone have any ideas? Thanks Sean

 

P1399 - Manufactures control Ignition system OR Misfire, auto zone was WAY off.

Little parts store secret - if they really knew how to fix cars, wouldn't they want to make more money as a mechanic rather than be a clerk?

Do you know the last time a distributor cap, distributor rotor, spark plug wires, and spark plugs were replaced? If they haven't been changed in a while (30k+ miles on the cap and rotor), it's a good idea to change them, they're maintenance items. Make sure to get NGK spark plugs (standard copper are fine, won't need anything fancy) and a set of plug wires from the dealer (OEM are the best quality, expect to pay $80 for them).

An easy test for a misfire is to unplug each spark plug wire, one by one, while the engine is running and listen for a change in how the engine is running. When you get to a wire that doesn't change the idle speed or smoothness, it's not firing correctly.

If this doesn't solve your problem, the distributor itself, specifically the ignition coil, could be at fault.