Over the last 4-6 months my Tahoe has been giving me problems accelerating when I give it a heavy foot. When I hit the gas down anywhere past about 60-75% down it loses acceleration almost like it's being starved of air or gas. I can even hear a pop every now and then out of the exhaust when I gun it and I lose acceleration. When I get on the highway I have to (more recently) let the car build up speed by pushing the gas pedal slightly less than where the car loses acceleration. It's like I'm towing a heavy load behind me almost. The strange thing is that if I'm light on the pedal then it drives around just fine. This weekend I drove to Las Vegas and I had to get in the "Slow Truck Lane" when going up the inclines. I seriously could not go faster than 45 or 50 MPH up the steep elevations. I'll take all the help I can get if any of you have some suggestions? The vehicle has
143,000 miles on it and regular oil changes. Someone in a shop told me that it could be my Mass Air Flow sensor or my air filter but I changed that today and still the same problem. Thanks in advance for suggestions!Justin