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Low idle problems

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Old Feb 5, 2013 | 07:19 PM
  #61  
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Originally Posted by kjs88xj
Good to know, thanks cruiser
This is because unlike a PCV system (which does just that) the CCV setup constantly draws fresh air through the valve cover, picking up fumes along the way.
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Old Feb 5, 2013 | 08:10 PM
  #62  
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Year: 1991
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Map sensorsssssssssssss
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Old Feb 5, 2013 | 08:37 PM
  #63  
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Originally Posted by salad
This is because unlike a PCV system (which does just that) the CCV setup constantly draws fresh air through the valve cover, picking up fumes along the way.
What's the difference between a pcv and a ccv? Because when I look at autozone the thing I can find to stick in those hoses is called a pcv, will that work or should I grab some from the junk yard?
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Old Feb 5, 2013 | 08:39 PM
  #64  
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Renix Vacuum Harnesses
The vacuum harness that attaches to the front of the valve cover and includes the grommet/fitting, and is called the front harness, is Napa part number BK 715-1367
 

http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=BK_7151367_0269070623
 
The vacuum harness that is closest to the air cleaner, EGR etc, and is called the rear harness, is Napa part number BK-715-1366.


http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=BK_7151366_0269070622

 

The tube from the rear of the valve cover to the intake manifold is part number 715-1365.


http://www.napaonline.com/Catalog/CatalogItemDetail.aspx?R=BK_7151365_0066877355

 

Revised 09-11-2012
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Old Feb 5, 2013 | 08:47 PM
  #65  
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Originally Posted by cruiser54
Renix Vacuum Harnesses
The vacuum harness that attaches to the front of the valve cover and includes the grommet/fitting, and is called the front harness, is Napa part number BK 715-1367
 

http://www.napaonline.com/Catalog/Ca...367_0269070623
 
The vacuum harness that is closest to the air cleaner, EGR etc, and is called the rear harness, is Napa part number BK-715-1366.

http://www.napaonline.com/Catalog/Ca...366_0269070622

 

The tube from the rear of the valve cover to the intake manifold is part number 715-1365.

http://www.napaonline.com/Catalog/Ca...365_0066877355

 

Revised 09-11-2012
Alright, I'll try this next. I'll take a look at my set up tonight, hopefully you won't see a thread from me asking how to install it lol. Thanks guys
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Old Feb 5, 2013 | 09:02 PM
  #66  
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Originally Posted by kjs88xj
What's the difference between a pcv and a ccv? Because when I look at autozone the thing I can find to stick in those hoses is called a pcv, will that work or should I grab some from the junk yard?
AutoZone is a bunch of idiots. Though you'll frequently find the CCV fittings and elbows incorrectly called PCV Valves in MANY parts databases

Positive Crankcase Ventilation: Valve-operated release of crankcase pressure from blowby, engine inhales gasses.

Closed Crankcase Ventilation (called this to differentiate from the draft tubes of old): Fresh air always running through valve covers, engine inhales air and gasses. No valves.
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Old Feb 5, 2013 | 09:03 PM
  #67  
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Originally Posted by salad
AutoZone is a bunch of idiots. Though you'll frequently find the CCV fittings and elbows incorrectly called PCV Valves in MANY parts databases

Positive Crankcase Ventilation: Valve-operated release of crankcase pressure from blowby, engine inhales gasses.

Closed Crankcase Ventilation (called this to differentiate from the draft tubes of old): Fresh air always running through valve covers, engine inhales air and gasses. No valves.
Yep. Just go to Napa with the part numbers provided.
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Old Feb 5, 2013 | 09:08 PM
  #68  
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Originally Posted by salad

AutoZone is a bunch of idiots. Though you'll frequently find the CCV fittings and elbows incorrectly called PCV Valves in MANY parts databases

Positive Crankcase Ventilation: Valve-operated release of crankcase pressure from blowby, engine inhales gasses.

Closed Crankcase Ventilation (called this to differentiate from the draft tubes of old): Fresh air always running through valve covers, engine inhales air and gasses. No valves.
Yea I hate going into autozone so I just use the app on my phone.

So the system is not there to just take excess air out of the valve cover area (valve cover area?? Yea I don't know what I'm taking about) it is there to put clean air INTO the "valve cover area"?
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Old Feb 5, 2013 | 09:10 PM
  #69  
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Originally Posted by kjs88xj
So the system is not there to just take excess air out of the valve cover area (valve cover area?? Yea I don't know what I'm taking about) it is there to put clean air INTO the "valve cover area"?
It does both. It recovers blowby and oil fumes as well as providing some of the fresh air for the engine. Particularly important when the throttle plate is shut.
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Old Feb 5, 2013 | 10:03 PM
  #70  
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Originally Posted by salad

It does both. It recovers blowby and oil fumes as well as providing some of the fresh air for the engine. Particularly important when the throttle plate is shut.
So when I'm sitting at an intersection idling and I give it gas and it bogs down and dies as if it getting flooded/not getting enough air, these hoses are probably the cause? I should have just asked you guys in the first place I've spent over $100 trying to fix this thing going off what random people suggest lol

Also I have a 1988 xj, but the motor is out of a 1992 xj, can't remember which valve cover I used though, is this going to cause any compatibility issues?
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Old Feb 5, 2013 | 11:11 PM
  #71  
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Sounds like you should look at your spark as well as air (vacuum). If your plugs are fouled it could do the same thing, or at least exacerbate the problem
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Old Feb 6, 2013 | 12:18 AM
  #72  
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Assuming your IAC is in good working order. Make sure TPS is good. Check fuel pressure and make sure its 50 psi. Also check the injectors to make sure you dont have a weak one-also o-rings on the injectors-Good luck

Last edited by KCXJKID; Feb 6, 2013 at 01:47 AM.
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Old Feb 6, 2013 | 12:27 AM
  #73  
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Sweet, got a whole list of things to check out, thanks guys I appreciate the help
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Old Feb 11, 2013 | 10:13 PM
  #74  
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So when i have my defroster on, my idle noticeably improves. Less rough and doesnt miss alot. Any reason to why this is?
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Old Feb 11, 2013 | 10:19 PM
  #75  
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All I can think of is the aC compressor kicks on with defrost and the eCU sends a signal to the IAC to move and increase the idle speed.
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