hello i got a ? for u guys

so i got a shutter and low power truck just runs like crap after warm up when I start the truck first thing in the morning the truck runs perfect until normal operating temperature turn off the truck turn it back on after 10/15 minutes truck runs like crap what is going on ?

coolant temperature sensor ?
02 sensor ?
timing is way off ?
I have changed spark plugs/wires/coil/distributor cap/rotor

please help its driving me crazy

 

What do you mean like crap? No power, if so you might check tranny for overheating if an automatic.

 

could very well be the coolant temp sensor. run a forum search on testing it. easy enough to test on the vehicle.