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Old 10-26-2021, 05:49 PM   #1
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PCV Valve and Tube.

1999 V10.

As our Rv is still not really running right, Could the PCV valve if faulty cause any reall running problem. Need to take it off with tube and see if it rattles (according to internet ) and check the tube for splits.
Can find the valve on Rockauto, but no listing for the tube.

If we are going to replace, would like to change both parts so can rule out that bit.
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Old 10-26-2021, 07:44 PM   #2
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????? ' not really running right " , can you describe what your issue is .

PCV valve and/or tube leak; will have little effect above idle . Engine ECU will adjust fuel injectors to compensate for any extra air entering the intake manifold and keep fuel mixture in range.

Have you looked at plugs and wires ?

I'll assume you have no CEL or stored codes.
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Old 10-26-2021, 08:54 PM   #3
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I would be surprised if pcv is it.. if you inspect elbow and find I does need replacement.. try dorman.com.. really any auto parts store .. remember.. you have a ford light duty truck eng and trans bolted to big frame.. so cross reference for 1999 ford f350 or f250.. most of time that works
As stated above.. start with plugs and wires.. or pick up or borrow scanner.. see if that helps..
Clean mass air flow sensor..
Good luck and let us know what you did and maybe better members then me will help you
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Old 10-26-2021, 08:59 PM   #4
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Oh.. and you are right.. it could be a vacuum leak.. that old.. so spend the time.. with good flashlights and inspect all.. I mean all.. vacuum lines.. and where they connect.. vacuum lines do get rotten and they are time consuming to check.. so save yourself a lot of money and do it .. carefully and closely..
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Old 10-28-2021, 05:31 AM   #5
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Thanks for replies.

As it was running really erratic, found the EGR valve faulty. Changed it and the EGR solinoid and she ran better but still not right.
As a few google searches for vacuum leaks is to run engine and carefully spray engine start across inlet manifold and hoses to see if engine note changes.
Well it did not so suspect No vacuum leaks.

Does sound like we now have exhaust leak now, but will take a Video of starting and run of engine to see if you can possibly work out a solution.
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Old 10-28-2021, 10:29 AM   #6
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Many times.. the tip of using starting fluids to find a vacuum leak.. does not work.. as good as eyes..
That said.. when is last time TB. Was taken off and cleaned ?
Good luck and let us know what you did and maybe better members then me will help you
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Old 10-28-2021, 06:39 PM   #7
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My vacuum leak was on the reservoir tank fitting.


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Old 10-29-2021, 03:16 PM   #8
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I was having problems with my 1999 f53. The rubber hose on the passenger side going to the valve had split. Changed it and no more problems.
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Old 10-30-2021, 06:26 AM   #9
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Quote:
Originally Posted by spyderRV View Post
My vacuum leak was on the reservoir tank fitting.



We have checked that, all seems well there.
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Old 10-30-2021, 06:27 AM   #10
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We need to take another look at the hose and take it off again to make sure there is not a problem with it.
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Old 10-30-2021, 06:30 AM   #11
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should throw a lean code if its split.
If you are changing it, change the molded hose, PCV and grommet.
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