mlunsford
New Member
- Joined
- Jul 30, 2008
- Messages
- 57
- Reaction score
- 0
- Points
- 0
- Vehicle Year
- 99
- Make / Model
- Off Road
- Engine Size
- 4.0 OHV
- Transmission
- Automatic
At idle my 4.0L has 20 HG/in and when I rev it the vaccuum drops for a second then the vacuum goes up to about 22HG/in. Does this sound about right ?
I am trying to make sure my cats are not creating back-pressure.
I am trying to make sure my cats are not creating back-pressure.