I have a 1997 chevy blazer 4.3 75000 miles. I recieved a Po300 Code. My mecanics said that they cant figure out what actually is going on. They know what the code means. I drive to college and about 70 mph on the interstate. By the time I drive 100 miles, my rpms are normal at 2200. They like to jump up too 2500 when driving at 70mph after a period of time. I get bad gass millage. Im guessing its the plugs and wires. I dont know for sure. My rpm tach jumps around between 2400-2600 while driving that fat and it seams like its chugging? Plz help Thanks
have the same problem?
Tuesday, June 12th, 2007 AT 7:46 PM