Hey all, first time on here. Have an 88 4.0 automatic Comanche, as stated in the title the thing is hesitating under load and spits and pops. Over the last few years I have replaced a ton of stuff on this thing. New intake/exhaust gasket, knock sensor, throttle position sensor, map and mat sensors, ecu, timing chain and gears, fuel pump, injectors, fuel pump relay, O2 sensor, complete exhaust system, crank position sensor(on bell housing), and the idle speed sensor. There’s more but I think that’s all that would pertain to this issue. Recently replaced the timing chain and gears and it ran good for about 15-20 minutes. It overheated and shortly after ran like crap. As far as I can tell no blown head gasket. Has good compression in all cylinders 135-150. Any ideas? Do distributors go bad in these things often?