for some reason my car doesnt wanna go over 80mph no matter what i do, downshifting, or anything. I'll hit 80 and then it wont go any higher, i'm planning on switching out the sparkplugs tomorrow and seeing whats gonna happen. Please leave some advice!!

 

does your car stop at a certain rpm in all gears? or run sluggish?

 

i wouldnt call it sluggish, but since its already at 140,000 miles i try not to beat on it so bad, the most i rev'ed up to was 7k it starts to shake a little bit, but it still accelerates well.