As vehicle excelerates past 50 mph, engine hesitates or hiccups. If accelerator is pushed firmly, the vehicle speeds up and all is fine. Recently changed spark plugs, transmission fluid, oil, oil filter and have used upgraded gas for 2 tanks now as this started after purchase of a half tank of gas from a reputable dealer. Any ideas?
Wednesday, December 12th, 2012 AT 9:24 PM