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It's still misfiring. The engine is running to fast for the computer to pick it up. Pull the plug wire on 6 , start the truck. look for spark out of the wire. No spark, replace the coil pack. Spark, pull the plug,see if it is fouled out. I would do a compression test also, while the plug is out.
Could be a massive intake air leak being caused by a defective egr valve.
Could be just about anything and it will need similar checks to an engine when it is a cold non-starter with verification of the essentials of spark, fuel, compression and timing.
Lots of components can become temperature temperamental.
Good luck!
Looks like you need to replace the coolant temperature sensor for the computer. This will make the engine run rich all the time. You can simply check it with a scan tool with live data capability. With the engine warm read the engine coolant temperature. My guess is it will read very cold even with the engine warm. If so replace it and the truck will be running like new
ok if the timing chain was bad it would not run. bogging down is from increased resistance from something. since you have overheating i would guess the water pump broke when you heard the sound. ther is a belt around it and that would cause this. since it idles fine i would wait till it is cold and open the radiator then run the engine and see if you see water moving in the radiator. if nothing after 10 min then i would suspect the water pump. watch that you don't overheat the engine doing this. that would cause other problems that could be more expensive to fix good luck
It sounds like the spark plug leads are getting tired as they will cause a miss under load,you can take each one off 1 at a time and measure the resistance in ohms i think you will find one of them is much higher in readings than the others,and check your spark plugs are ok as well,should fix it for you good luck
If I understand you correctly your vehicle will still start but bogs down...If this is the case have the catalytic converter checked if it is plugged this would cause the same conditions as you described.....
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