Ok, i have a k1500 blazer with 272,800 miles on it. She's gettin old, but still runnin. Now this is a current problem, but i deal with it. Lets say im at dunkin donuts, and its all zigzaggy and crap, so when i give it a little gas, and let off, it sounds like she's chokin, and the rpms drop to under 100. I think she's losing compression. What do you guys think, suggestions?