A while back the check engine light came on. Following instructions in the book we checked the gas cap, ect. Then ran that tank empty and filled up with a full tank of high octane. On 1/4 tank the light went out, however before we were getting about 320 miles to a tank of gas. Now we are lucky to receive 180 miles from a tank and you have to hold the gas pedle to get it to start most of the time. Not particulrly in the morning or evening. Once it even quit while going down the road. After 4 trips to a dealership they say that the computer says the vechicle is fine. Any suggestions????
Also there is a "clanking" noise under the vechicle about in the center. At first it started out as a noise in the passenger front tire then it progressed to the state it is now. It honestly sounds like something is about to fall out from under the vechicle. It has also been to the dealership several times for this also, with no luck. Thye say they have no clue that it could be anything and to bring it back when it gets worse.
In need of assistance