stfree
New Member
- Joined
- Jan 19, 2013
- Messages
- 6
- Reaction score
- 0
- Points
- 1
- Location
- Costa Rica
- Vehicle Year
- 1990
- Make / Model
- Ford
- Engine Size
- 4.0
- Transmission
- Automatic
Hello all,
I'm trying to determine what to expect in applying a vacuum to a suspect vacuum modulator on a A4LD '90 Ranger. Should I be able to pump a specific number of inches of vac and expect it to hold? What I see now is that I can rapidly pump down to about 10" of vac but it bleeds off within 3-4 seconds. I'm connected directly to the device straight off the pump with a known good hose.
Thanks
I'm trying to determine what to expect in applying a vacuum to a suspect vacuum modulator on a A4LD '90 Ranger. Should I be able to pump a specific number of inches of vac and expect it to hold? What I see now is that I can rapidly pump down to about 10" of vac but it bleeds off within 3-4 seconds. I'm connected directly to the device straight off the pump with a known good hose.
Thanks