My 1990 Olds Delta 88 Broughm, runs pretty rough when cold then smooths out. It used to take a mile or so to smooth out, now it takes about 20 miles. I commute 56 miles each way.
There also is a smell of gas at the rear of the car, about under the back seat. No gas drippings though. I had the sending unit and alot of gas line replaced about three years and 80-100k miles ago.
This wonderful car has 180,00 miles on it. After the roughness goes away, it runs like a dream. It will ocaisionally run rough after my commute when I get into city driving.
Any ideas will br greatly appreciated.