I own a 98 Blazer LS with about 67,000 miles on it. I just bought it a few months ago and everything was fine until a few days ago when I got on the highway and it was very hard to accelerate. If I let of the gas a little the engine would get fuel but as soon as I would press on it a little harder it wouldn't do anything. After I pulled over and looked under the hood for a few minutes it started up and ran fine for a little bit and ended up doing the same thing. Also, I've noticed that a few days prior it has been hard to start. I'm thinking fuel filter.....any suggestions?
If you haven't changed the fuel filter for a while it's not a bad idea to do so. When you change the filter, tap out the fuel onto a white rag and see if you see any black in the fuel. Black in the fuel filter is an indication of wear in the fuel pump ( black carbon brushes)
Changed the filter and I still have the same problem. The acceleration problem only happens after I drive for a little while. If I stop the truck for a minute it drives fine and eventually happens again. Also, when I pulled the old filter I notced lots of black in my fuel line.
amazing!..im having the same prob on my 97. feels like the converter is locking up and when i shut down the vehicle it unlocks till i get to like 40 mph. the 4.3 feels like its straining against the converter.