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Vacuum line problems?

Tiny
JOHN YOUNG
  • MEMBER
  • 1999 FORD RANGER
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 16,200 MILES
When I turn the heater on, it is not pulling a vacuum in the vacuum line that plugs into the vacuum control motor. As a result, this prevents the vent from opening to allow air flow across the hearter core. Why am I not getting a vacuum in this line. I beleave all the controlls are working correctly.
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Sunday, September 12th, 2010 AT 5:48 PM

9 Replies

Tiny
BILLYMAC
  • MECHANIC
  • 2,204 POSTS
First thing to check is do you have vac at the heater switch. If yes then the switch is not switching vac may be disconnected at switch. Check vac line comeing inside truck from firewall may be broken or kinked
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Wednesday, March 6th, 2019 AT 5:44 PM
Tiny
JEFFCOW
  • MEMBER
  • 1 POST
  • 1996 FORD RANGER
  • 180,000 MILES
My ranger has a broken vacuum line and I need to know where it goes. I have figured out that one line goes to the purge valve and I don't know where the other one goes. Please help.
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Sunday, January 5th, 2020 AT 7:54 PM (Merged)
Tiny
TY ANDERSON
  • MECHANIC
  • 719 POSTS
Here is a vacuum diagram for the 2.3l, 3.0L & 4.0L. Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.
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Sunday, January 5th, 2020 AT 7:54 PM (Merged)
Tiny
NANA614
  • MEMBER
  • 2 POSTS
  • 1992 FORD RANGER
  • 20,000 MILES
Changed the heads and cannot remember where the vacuum lines go
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Sunday, January 5th, 2020 AT 7:55 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
There are 2 different routings im sending both
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Sunday, January 5th, 2020 AT 7:55 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Screwed p both are the same on first reply
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Sunday, January 5th, 2020 AT 7:55 PM (Merged)
Tiny
NANA614
  • MEMBER
  • 2 POSTS
Thank you for your answer
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Sunday, January 5th, 2020 AT 7:55 PM (Merged)
Tiny
JOHN FRASER
  • MEMBER
  • 1 POST
  • 1990 FORD RANGER
  • V8
  • 4WD
  • AUTOMATIC
How can I download a schematic showing the vacuum line configuration for a 1990 Ford Ranger XLT with the 4.0 engine? Where can I download a schematic drawing of the vacuum line configuration
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Sunday, January 5th, 2020 AT 7:55 PM (Merged)
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
See if this helps
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Sunday, January 5th, 2020 AT 7:55 PM (Merged)

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