If you've got a vacuum gauge you can. Hook it up to manifold vacuum and watch it while idling. If it starts to slowly drop, you've got a restricted exhaust.
Take care
~Chris
------------------
Retired Moderator
MustangNet
My site:
JimPorterRacing
RACECAR spelled backwards is RACECAR
HEY !!! Are you ASE Certified ??? If you are, ask me about iATN. The best tool you'll ever have, and it's free !!!