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Why is my Chevy S-10 struggling on power?
My grandfather has a 4wd crew cab chevrolet 2002 s10 and I don't understand why it is cutting out. It is a 4 door, 4.3 v6 vortex engine from my understanding with about 125k on it.
When the truck is cold, it will start up fine and it will run but after it warms up, it starts to hesitate. Not too bad and it never cut out completely but it kept acting like it wanted to. We thought that it cold be a dirty air filter and fuel filter so we changed them out completely. The fuel filter really showed it's age because after about 100k, it was spitting out almost black fuel. (Yes, we agree that we should change it every 50k and we will). After we replaced both, it started up much more quickly, and it ran great. No hesitation and the throttle response came back as new. It wasn't even a few weeks later that the truck started doing this again. Now it's doing it about the same if not, maybe slightly worse.
We are not sure what is going on and we would like to see if you all can help us fix this since we really need that truck running smoothly. Thanks all.