my car STALLS IN GEAR WHEJN I PRESS THE GAS EXCEPT NEUTRAL

I've just replaced the engine in my 99 (4.0 SOHC, 5 speed atx) and it runs great. Everytime I attempt to drive it i have the same problem. I thought it was fuel, replaced the filter and pump. Removed the plenum and checked for vacuum leaks. Thought maybe the coil pack was breaking down, replaced that no change. Please let me know if you've figured yours out. Joe

[quote:8244c7c824="jbird1955"]I've just replaced the engine in my 99 (4.0 SOHC, 5 speed atx) and it runs great. Everytime I attempt to drive it i have the same problem. I thought it was fuel, replaced the filter and pump. Removed the plenum and checked for vacuum leaks. Thought maybe the coil pack was breaking down, replaced that no change. Please let me know if you've figured yours out. Joe[/quote:8244c7c824]

i think im not sure its the problem but a ford dealer technician told me he had 1 and that his was doin the same thing and he said his lower intake gaskets were hard allowing to much air in but if you find out the problem let me know im goin to fix the gaskets tommorow ill let you know if you find out the problem please keep me posted as ill do the same for you thank you

I finally found my answer, a blocked MAF tube. I bought this truck in July of last year and before that, it had been sitting since January. Apparently, some insect made it's way up into the horn and then to the tub of the MAF. It blocked off both ends of the tube with webbing and that was my problem. Check your MAF and make sure the tube is clear (you'll need a security torx to remove it from the horn). Joe