Have a new message on dash display that states "Drive Slowly Service Urgent". Car is driving extremely poorly. Will not accelerate, vibrates when trying to accelerate. 60 mph is hard to get to... I'm new to the forum, any help would be appreciated. Woops...It's a 99' s80 2.9...

 

Time to go get the codes pulled, without them, you'd be guessing.

 

Most likely a misfire due to a failing coil. Im guessing when you try to accellerate the Check Engine light flashes? Get the codes pulled and drive it as little as possible or you risk damaging the O2 sensors and or cat.

 

Damn you coils - you strike again.