Question about Ford Bronco II

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2 inlet pcv valve on 1985 ford bronco II can't find 2nd vacuum hose location

My bronco had been stalling, but everytime I go to troubleshoot it, it works fine. As I was tinkering on it today found a vacuum leak at the pcv valve, I cover the inlet with my finger and the engine runs a whole lot smoother, but cannot find where the vacuum hose that goes to it is at. do I have the wrong pcv valve or missing hose?

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  • mgpeebles86
    mgpeebles86 Apr 21, 2013

    the lower larger inlet on the pcv valve has a hose from carb or intake, can't remember right off hand, but the top smaller inlet has nothing and is constantly sucking air, just bought this truck a few weeks ago, not real familiar with carb engines

  •  Mike McDonald
    Mike McDonald Apr 22, 2013

    Just plug the unused port

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  • 149 Answers

You have the correct pcv, the second port is not always used and the port that isn't used is simply plugged off. New pcv valves even come equipped with the block off plug.

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

  • 239 Answers

SOURCE: pcv valve

The positive Crank Case Ventilation (PCV) is coming from the intake manifold and usually goes to the Valve cover On that year it could be in the back of on the side of the Rocker covers ( Valve Cover) find the Vacuum line coming out of your intake and follow it, It should lead you to the Pcv

Posted on Jun 17, 2008

sscullys
  • 984 Answers

SOURCE: Replaced PCV Hose due to vacuum leak, idle correct

If it is the same engine design as the F-150 ( think the '98 was still the 2V V-8 ) it could be the IAC ( Idle Air Control ) is gummed up.

The F-150 it is mounted on the back of the Throttle Body ( have to take off the plastic throttle body cover to see it ), held on with 2 bolts with 8mm heads ( could be 9mm ??).

Worth taking a look, also take a look at the VAC line to the back of the throttle body, and check that the IAC connector did not get unplugged or the wires damaged from the other vac line change
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Posted on Dec 03, 2009

Testimonial: "Will do today and respond back, I have spoken to a few Ford guys, clean the T.B., check the IAC, etc. Thanks so much!"

co7196
  • 3433 Answers

SOURCE: 2004 Mazda MPV vacuum line from pcv valve and

You have the wrong type hose on the pcv valvle. It isn't vacuum hose.

Posted on Nov 12, 2009

Testimonial: "thank you you have been very helpful i understand now but the hose that is on the new pcv valve is a vacuum hose "

brainyass
  • 242 Answers

SOURCE: 2006 pt cruiser idles high with no pcv valve hose connected

Replace the PVC valve, it's probably clogged.

Posted on Nov 21, 2008

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