I have a 2007 Honda Accord k24a engine. Shutters in drive and stalls when you put your foot on the gas. Does anyone know if Honda has come up with a solution to this problem? I have replaced all motor mounts, plugs and coil packs, MAF sensor, MAP sensor, cleaned then replaced throttle body. Fuel pressure is at 52. Adjusted all valves and performed pressure differential test - all valves at 91 psi in and all held at about 90 psi. Holds vacuum at 22. Battery tested good, alternator charging at over 14 volts. Tested EGR and cleaned ports. Had a throttle position code, replaced and performed throttle relearn and code cleared. RPM around 800 in neutral and park but drops to 500 - 600 in drive.I noticed the throttle plate closes when you first lightly step on gas pedal and then recovers and opens as normal. Checked it against another 2007 accord and it does the same thing. I am at a loss as to what else to check, any help would be appreciated.