I've been having an on going problem its been getting worse and worse 84 944. It runs great then all of a sudden feels like its running on one cylinder. then it just goes away. the last time I was doing about 90 on the highway when I got onto the exit ramp it started this time it didn't come back I let it sit and then it ran fine after a while. Anyone have any Ideas.

 

I would start by checking your TPS, dme relay, and speed and reference sensors. All can have symptoms like that before they fail.

 

Thanks

 

? Did you check all the items I listed above?