Ok my car has been pretty shabby for the past couple of days. First the maintenance light appears and I think nothing of it since I just changed all my fluids and filters. Then when I turned my car on a couple of days ago when it was cold it reved up and down and idled below 1k. I blew that off as well, but now when i start it up it dies. When I drive it, it dies. When I start it up and proceed to step on the gas it makes a putt putt noise and the rpms don't move. I've taken it to two shops, a mechanical shop and John Eagle Honda. They gave me the following codes...

0300, 301, 302, 303, 304 misfire on all cylinders, p1399 air/fuel mixture problem.

Both said that it could be anything and they don't know the exact problem. They said it might be the IAC, one of my sensors, etc. Anyone have any idea what is going on?

 

Did you or they check the plugs? Have you had them check the timing? Also, it might be time to find a new dealership if they actually told you "they don't know..." that would make me uneasy about returning my car there for work.

 

maintence light has nothing to do with it. I take it you got a cel

 

This actually sounds simple enough to fix. Any decent tech should be able to read your STFT/LTFT numbers, do some flight recording and fix the dam thing. Wish you were closer...

 

did you overrev it ,sounds like bent valves

 

This is all too true...If the "Maint req'd" light started flashing, it is total coincidence. The CEL however (little picture of an engine) is directly related. I think you A/F code is causing the misfire codes, so I'd start with viewing your STFT (short term fuel trim) It is likely pegged, and may be at max +FUEL correction.