I have a '95 Contour, 4 cyl., 5 speed.
It had been occassionally kind of hiccupping or hesitating a little when accelerating...thought maybe it was fuel injectors.
I tried some fuel injector cleaner...a couple of cheap ones, since problem was pretty minor. One day last week it was doing its usual occasional minor hiccuping on the way to work, but after work when I started up, it was immediatly really bad. It is like there is no power and acceleration is kind of jerky...like the hiccups but continuous. Kind of sounds like a sewing machine when accelerating, but runs smooth when idling.
This weekend I put another fuel injector cleaner (brand was Gunk...concentrated...) in on Saturday and today it seems like it was perhaps occassionally getting a little better...but not sure yet.
Am I on the right track in thinking fuel injectors are the problem? Has anyone had success using any particular brand of injector cleaner? The most recent stuff I put in (Gunk) says to use every 6000 miles...some others say you can use every tank...are there any problems caused by using too much injector cleaner or using it too often?
With a search, I had found some previous posts here about fuel injector cleaners. Several recomended replacing fuel filter after using the injector cleaner...does the cleaner cause the filter to get plugged up? Also some said to "drive it hard" with the injector cleaner in the tank...does that mean heavy acceleration (so I should drive like I normally do :-))?
