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How to clean your idle air control valve
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03-22-2010, 09:35 PM
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#46
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Registered User
Join Date: Apr 2009
Location: Texas
Posts: 4,326
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Okay, I went to remove the IAC today only to find that it seems the bolts have some sort of Torx heads. Am I correct? My Torx set isn't really built for this. Do I need to go buy a set just for this job, or am I even correct in thinking they're Torx? It's hard to see even when using a mirror. Darn, but it seems on the 4.0 in a ZJ they put it back against the firewall and made it very difficult to get at. There's all kinds of stuff in the way, and I'm not in the mood to remove it.
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03-23-2010, 03:18 PM
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#47
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Registered User
Join Date: Oct 2008
Location: Spokane, WA
Posts: 2,702
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yeah Jonathan, they are torx. The 5.2L is accessible, but on the 4.0 on my XJ and the bf's TJ we had to remove the throttle body to be able to get to the torx bolts on it. Its not too hard to remove the TB. 4 normal hex head bolts and disconnect the throttle cable. Its kind of convenient that way in the fact that since you already have the TB disassembled, you can give it a really good cleaning too!
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1998 ZJ Laredo, 4.0L, 2WD "Band Van", Current
1997 XJ, 4.0L, 30x9.50 Maxxis Bighorns, super 44, Sold
2003 WJ Overland, 4.7L HO V8, 6000K HID's, Sold
1996 ZJ Laredo, 5.2L V8, 3" Kolak exhaust, K&N FIPK, 4300K HID's, Sold
http://www.facebook.com/home.php#/pr...27&ref=profile
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03-23-2010, 05:23 PM
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#48
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Registered User
Join Date: Apr 2009
Location: Texas
Posts: 4,326
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Thanks, Haley. I might have to do it that way in the end. Either way it looks like I might have to remove other stuff to get at everything though. There are vacuum lines in the way, and I just FINALLY got my vacuum system working good. LOL I don't want to mess any of that up. It's always something.
I hope I have a nice Saturday this weekend to work on it now. It'll give me time to get it done and take my time. I hate rushing things.
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04-29-2010, 12:57 PM
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#49
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Registered User
Join Date: Apr 2010
Location: Titusville, NJ
Posts: 9
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Thanks for making it look easy...it really was
Hey, I was having idle issues and stumbled on this thread. Thanks Haley for making it look easy and everyone else for the tips. You all inspired me to join!
I just cleaned the IAC on my 95 ZJ's 4.7L V8 and so far so good. Idling around 700 now and I can tell a slight difference in over all performance I guess from better air mixture.
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04-29-2010, 01:02 PM
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#50
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Registered User
Join Date: Oct 2008
Location: Lima, Ohio
Posts: 3,366
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Quote:
Originally Posted by Chango08560
Hey, I was having idle issues and stumbled on this thread. Thanks Haley for making it look easy and everyone else for the tips. You all inspired me to join!
I just cleaned the IAC on my 95 ZJ's 5.2L V8 and so far so good. Idling around 700 now and I can tell a slight difference in over all performance I guess from better air mixture.
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Fixed.....
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04-29-2010, 01:15 PM
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#51
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Registered User
Join Date: Apr 2010
Location: Titusville, NJ
Posts: 9
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My bad, I was just looking at the oil capacity on the owners manual.
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04-29-2010, 01:59 PM
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#52
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Registered User
Join Date: Apr 2010
Location: Titusville, NJ
Posts: 9
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One thing... I broke something. Can you tell me what it is?
While making my way to the torx bolt on the drivers side that holds the IAC in place, this thin tube snapped in two places? It looks like it is coming off of a sensor of some sort and I haven't been able to find it on an engine diagram. Can anyone identify it for me so I can replace it? It didn't interfere with my starting and driving after replacing the IAC...
Thanks
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04-29-2010, 04:45 PM
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#53
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ZJjazzyJim
Join Date: Sep 2004
Location: Denver, Colorado
Posts: 13,357
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Looks like vacuum line - I bet your vents are on full defrost.
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Best mod you'll ever do on ANY vehicle!!!!
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04-29-2010, 05:52 PM
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#54
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Registered User
Join Date: Oct 2008
Location: Spokane, WA
Posts: 2,702
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It's an evap solenoid. I believe it goes back to the tank but I'm not sure. Have you smelt gas since it happened? Any check engine light?
__________________
1998 ZJ Laredo, 4.0L, 2WD "Band Van", Current
1997 XJ, 4.0L, 30x9.50 Maxxis Bighorns, super 44, Sold
2003 WJ Overland, 4.7L HO V8, 6000K HID's, Sold
1996 ZJ Laredo, 5.2L V8, 3" Kolak exhaust, K&N FIPK, 4300K HID's, Sold
http://www.facebook.com/home.php#/pr...27&ref=profile
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04-30-2010, 06:46 AM
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#55
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Registered User
Join Date: Apr 2010
Location: Titusville, NJ
Posts: 9
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I have not smelled gas nor is there a check engine light for it. Can I fit it with replacement tubing or is this even an easy fix? Might I have to replace the whole line?
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04-30-2010, 09:26 AM
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#56
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Registered User
Join Date: Dec 2009
Location: Cincinnati
Posts: 50
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If it snapped like that, I'll bet you've got a lot of other lines that are rotting and getting brittle too. May be able to save some by using petrolleum jelly on them but with a 1995 (15 years old) it may be time to do a full inspection on all of your hoses.
This thread along with the TPS thread really saved me some heartache and dollars when I first got my Grand back in August.
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04-30-2010, 09:40 AM
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#57
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Registered User
Join Date: Apr 2010
Location: Titusville, NJ
Posts: 9
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Thanks Shadetree. That's a good point.
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06-13-2010, 04:55 PM
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#58
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Registered User
Join Date: Oct 2008
Location: Tennessee
Posts: 96
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Great write-up! That fixed everything!
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06-13-2010, 10:35 PM
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#59
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Registered User
Join Date: Oct 2008
Location: Spokane, WA
Posts: 2,702
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glad i could help!
__________________
1998 ZJ Laredo, 4.0L, 2WD "Band Van", Current
1997 XJ, 4.0L, 30x9.50 Maxxis Bighorns, super 44, Sold
2003 WJ Overland, 4.7L HO V8, 6000K HID's, Sold
1996 ZJ Laredo, 5.2L V8, 3" Kolak exhaust, K&N FIPK, 4300K HID's, Sold
http://www.facebook.com/home.php#/pr...27&ref=profile
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09-16-2010, 05:35 PM
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#60
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Member
Join Date: Sep 2010
Location: Mansfield, TX, Texas
Posts: 105
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Thanks, Haleyrz. I hope this fixes my "does not want to start and keep running unless I have my foot leaning on the gas" problem
__________________
1998 XJ - "El Jefe" 4.0L | Superlift | Dunlop | Cragar | Bushwacker | Hypertech | OR-Fab | Hi-Lift | Pilot | Smitybilt |
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