I have a 1990 chev p/u with a 4.3 and 135,000 2 wh drive. The engine runs good and has plenty of zip, but when on the highway doing about 60 mph, the vehicle loses speed and becomes very doggy. When I let off the accelerator just a bit, it will start to pick up. when I press down a bit more , it gets boggy till it downshifts, then it goes good. Once in lock up, same thing...... .Any ideas?
- posted
17 years ago