Hi, I have a2003 Chevrolet Impala LT, 3.8L V6 engine with 80,000 miles. When driving up asteep hill, I’ll step on the gas pedal but there is little power. The car seemsto want to take off at first, but then it will kick back down. Twice whendriving up hill I would press down all the way on the pedal and the check engine lightwould flash, but not come on steady. I had it to a local mechanic who changedthe spark plugs and wires but it’s still happening, I’m dropping it off againon Monday for him to take a look at the gas filter. He checked for codes but nocodes came up. On level streets it runsfine, but I live in a hilly area. This seemed to start happening after a heavyrain and became worse. I bought the car two years ago and it has an aftermarketCode Alarm automatic starter. Any help would be appreciated.