First off, Chevrolet S10 Blazer, 4.3L V6 automatic with a measley 206,000 miles! She was running great up until about 6-7 months ago.
Problem: Upon slow acceleration, at any speed, the engine will drag and hesitate. The Service engine light will come on and then the car will not want to downshift or shift at all. When floored at this point, nothing happens. Acceleration is virtually zero. After stopping the car (say at a redlight), starting again it will refuse to shift into 2nd gear. When it finally does, it will make a hard " thunk" sound and the car will surge forward. If the car is stopped and turned off for awhile, everything seems to go back to normal. Faster acceleration keeps the problem at bay. Having the heat on will make the problem happen pretty quickly so I run without it (I layer up well).
Transmission fluid and filter have been replaced recently, as well as, the fuel filter, fuel system cleaning, oil and filter. The speedometer also sticks and jumps as well on longer drives but I haven't checked the other posts for that yet!
Long and drawn out but that's the best I can explain it. Thanks for any posts you can direct me to that I may have missed or advice.
Thursday, February 8th, 2007 AT 6:38 PM