Thread: 97 F150 4.2 Roaring PLEASE HELP
View Single Post
  #7  
Old 10-25-2010, 12:25 AM
Davescort97 Davescort97 is offline
Escort guy
  
Join Date: Dec 2004
Posts: 2,486
Thanks: 0
Thanked 3 Times in 3 Posts
Re: 97 F150 4.2 Roaring PLEASE HELP
If you have a vacuum gauge put it on the intake and get a reading. If it is less than 18 at idle and continues to go down the longer the engine runs you have a plugged cat or muffler.
Reply With Quote