I have a '99 Grand Am GT, that has almost 90k on it, recently I have noticed that when I am going around 70 m.p.h., every now and again I get jump or a chug in the engine for lack of a better word. The rpms are around 2000 when it happens, and they go up to about 2200 then come right back down. I tried running a bottle of Gum Out through the gas, when I did the problem went away. On the next tank of gas the problem came back worse, then with midgrade instead of regular fuel it is not as bad. I know my description is not very good, but does any one have and ideas or suggestions? thanks
- posted
19 years ago