I recently purchased a 2002 trailblazer, vortec 4.2L I6 LS 2WD.
I have noticed that when you are sitting at a stop, and then quickly switch back to gas and begin to accelerate it seems to lose power for a second and then take off. this was the first issue I found until I was driving in town and it began raining.
at this point in time, it began missing. when taking off from a light it is very noticeable, you can watch the rpm bounce up and down over about a 700 rpm range and a sudden loss in power, but after a few seconds it seems to stop and it takes off but it periodically returns. it seems to be at its worst at a low idle.
the problem is that there is no service engine light, and it doesn't flash during acceleration. the fan shroud is currently not on it and it could be part of the problem, but I don't know. please anything will help/
I have noticed that when you are sitting at a stop, and then quickly switch back to gas and begin to accelerate it seems to lose power for a second and then take off. this was the first issue I found until I was driving in town and it began raining.
at this point in time, it began missing. when taking off from a light it is very noticeable, you can watch the rpm bounce up and down over about a 700 rpm range and a sudden loss in power, but after a few seconds it seems to stop and it takes off but it periodically returns. it seems to be at its worst at a low idle.
the problem is that there is no service engine light, and it doesn't flash during acceleration. the fan shroud is currently not on it and it could be part of the problem, but I don't know. please anything will help/