Engine stalls like it's fuel starved, changed filter with no rslt

It could be a timing issue (misfire) but it absolutely could also be either air or fuel filter. If it's starving for fuel, it's the fuel filter. If it's starving for air (too rich), it would also stall out and that could be the air filter. Basically, you need 4 things to make an engine work: compression, air, fuel, and spark.

Check your running fuel pump pressure. If (as I suspect) it's too low, first try changing your fuel filter. After changing the filter, recheck the running fuel pump pressure. If still low, check you fuel pump pressure regulator. If OK, you may need a new fuel pump.

Also probably would be a good idea to replace you air filter.

Good luck!

did they check that the filter was clean if filter is partly chocked itl allow enough for tick over but starv the engine with open thottle

try replacing the throttle position sensor

sounds to me like you might need to change your fuel filter, i had an Isusu P'up a while back that had a pebble in the fule filter and when fuel would get flowing the pebble would be pushed up into fuel path when fuel stopped flowing pebble would fall so on and so forth, my recommendationis to change fuel filter first

I would suggest changing the fuel filter. The engine seems to be starving for fuel and if the filter is pulgged, the engine will bog down under load. Then the engine will run better when coasting because the fuel pressure will build up again.

I think you might be barking up the wrong tree. Try changing your fuel filter. Often people confuse a plugged fuel filter for transmission problems. I'm not positive, but from what you've descibed it certainly could be. The engine is starving for fuel, and this makes it seem like the transmission is acting up.

It likely needs a fuel pump, hook up a fuel pressure gauge, it needs to be 11-13 psi

This should set a check engine light. If it did, then get the codes scanned. If it was not severe enough to set a light, then you may have injectors sticking.

change your fuel filter