Hey there everyone. I have a mystery that might be fun to solve. So In the morning I will start up my truck and if I go to accelerate too hard the engine will bog down and hesitate and stumble like the timing is off. While it is cold but still running I advance the timing by rotating the distributor cap and I can accelerate hard and there is no hesitation. But I don't leave it like that because the actual timing (using a timing light and grounding out the ecu) was fine before I did that (about 5 - 7 degrees BTDC). Also I don't leave it like that because as it warms up, after less than 10 min of driving the hesitation and stumbling goes away. I could put the pedal all the way to the floor and it accelerates just fine after it warms up. SOoo any ideas?