For a couple weeks not my maxima has been running like sh*t. When I start the car, it makes a struggling noise. In either park or in gear, the car jumps back and fourth for a couple of times, then stops, and starts again. After the car has warmed up, I can cruise o.k. but if I floor it, the RPM shoots up, and car doesn't go. At first it sounded like a tranny problem, but I've had people check it up and they said it wasn't.

For the past month or so I've been putting in the lowest quality gas because I was planning on getting rid of the car and thought "no one would ever know...." I'm thinking this might have something to do with it. Now I have been putting in the recomended gas - for 2 or 3 weeks - and I've seen some gradual improvment.

Has anyone experienced this problem before? Is there anything I can put into my gas tank that might help clean out some of that bad stuff? Any kind of feedback I would appreciate very much..

 

I don't know if lower octane gas would cause those problems, but why don't you just take it to the dealer? I ask because something doesn't sound too good.

 

If it's the gas, maybe some octane booster?

 

How many miles do you have on it? Have you changed the filters and done regular maintenece???