I have a 2007 Mercury Monterrey with 4.2L and it stalls almost every day when first started and put into gear forward or reverse. Once warmed up it appears to be ok. No codes !!!!

Did you replace the fuel filter ? And add some seafoam fuel injector cleaner to gas tank.

Yes tried both

When was last time you had a tune up popping noise you hear could be a spark plug miss firing.

I changed plugs last summer and wires

Does your vehicle have electronic throttle or cable throttle ? Sounds like throttle is staying open all the time instead of slightly closing when cold and opening slowly as vehicle warms up. If you have a cable throttle may have to adjust throttle if electronic throttle may have to replace.

It is a cable control. In my mind I am thinking coil pack or electrical . Engine dies fast just after a slight rough idle again only in gear. Happened again this morning. I let it die 3 times then once it got to a stable point it will run fin in gear. I appreciate the advice. I am willing to try anything to get this fixed. Last summer the check engine light did come on and code said plug 3 no good or wires or coil pack. I replaced plugs and wires and light went off. However maybe coil pack was still an issue .

Did you ever find the answer. I have a 2007 Mercury Montego that does the same. Have had everything changed out it seems and it is still acting like it has run out of fuel while I am driving and just stops. Mechanics can't figure it out either.