roo122jeep

i have a 1996 jeep cherokee 4.0 , just replaced the head gasket went to fire it up and it kept stalling now it runs good in park but when i put it in drive it stutters and i dont have much power at all, if i pull the injector connections off 3 5 6 it doesnt sound any different so i think there not firing there is spark on them so what is wrong with my jeep ran good before i replaced the gasket
and my tempter gauge isnt working also

Radi

If you are certain each cylinder is getting a nice blue strong spark and you got the firing order correct,
check for a vacuum leak.
Grab a noid light and verify each injector is firing.
Doublecheck connectors for all sensors, particularly the TPS.
If nothing, check compression on each cylinder to see if there's a gasket related problem.

karl4x4

PUlling the plugs one at a time is good fault finding.

It is strange that it idles fine but ill go with it and go under the assumption that it ran ok before you did the work other than leaking.
If it runs fine on idle, your firing order should be ok but I would check the firing order of the injectors. Some of the connectors are easily switched by accident.

I have also seen cracked distributor caps and/or spark plug cables connections getting pushed into the sleeve. make sure you hear the click when you push them in.