Thursday, October 4th, 2018 AT 8:22 AM
Okay, so on my car it started chugging when trying to hold the speed limit. When I am going uphill putting a load on it runs fine but when I back out of accelerator to maintain a speed it chugs. I have replaced the MAP sensor, O2 sensor, TPS sensor. Put new plugs in it. Replaced fuel filter. Plug wires and cap were changed 30,000 miles ago. Can anyone help?