2002 Ford Ranger Q&A

2002 Ford Ranger Question: what would cause the engine to have a low idle, then surge when driving hwy

it idles low when stopped, then when running at a higher speed it seems to surge. at times the brakes are hard to push. -
Answer 1
Needs to be checked for correct intake mauifold vacuum. Then for vacuum leak(s)! Probably needs to go to the shop. -