Broken vac hose fitting - Jeep Renegade Forum
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post #1 of 18 (permalink) Old 05-27-2016, 06:18 PM Thread Starter
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Broken vac hose fitting

While checking my air filter today I clumsily managed to break one of the plastic vacuum hose fittings that attaches to it. It's the one on the left currently being held in place through the creative use of zip ties.

Anybody know what this line goes to? I'm not getting a CEL yet but it's obviously no longer a perfect vacuum seal, so I'm wondering if the plastic neck that the fitting is part of is an available part or if the entire airbox will have to be replaced.
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post #2 of 18 (permalink) Old 05-27-2016, 09:46 PM
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Ha Ha! I did the exact same thing on my 2nd day. I slipped a 3" pvc tube inside as a connector and it seals it well enough. Not sure what its for or whether it sucks or blows gasses. Doesn't matter, its not an emergency. Never a code. and forget repair with any glue, its too structurally stressed for glues.

I was gonna say "it was like that when I got here" kinda thing to the dealer but I'm afraid of kharma. So I'll just wait it out until the local junk yard or the dealer has the part available. Its a shame, the connector actually slips off easily once you figure it out. Dont know if the unit comes off the lid or not. Looks like its sonically welded on.

What i wanna know is if the large air duct articulates with its lower segment and comes apart. I'd like more room when changing the oil filter. And its how it got busted to begin with.

I'll let you know when I come up with a fix.

And you're a braver man than I for bringing it up. I'd never have brought it up on the cobra forum. They'd laugh me off before rescinding my membership.

Jon
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Last edited by JFS; 05-27-2016 at 09:53 PM.
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post #3 of 18 (permalink) Old 07-05-2016, 03:16 PM Thread Starter
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Update: I'm at the dealer for an oil change today, and pointed this out. Price to replace the airbox is $287. It's still never thrown a code, and the tech agrees that if there was any significant vacuum leakage it would throw a code. Since this fitting is forward of the MAF sensor, it's automatically compensating for any loss of vacuum pressure. If the break was between the MAF and the throttle body, there would be real problems.

I'm going to leave it alone for now. If I happen across an airbox from a junker I'll probably swap it out. If it starts showing symptoms of a vacuum leak, maybe I'll hit it with some JB weld in addition to the current zip tie fix which seems to be providing pretty good structural integrity. It hasn't moved a whisker in the several thousand miles since it happened.


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post #4 of 18 (permalink) Old 07-07-2016, 12:09 AM
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Glad to have learned this before I broke mine! Thank you @CLShifter


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post #5 of 18 (permalink) Old 07-07-2016, 08:05 AM
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Originally Posted by CLShifter View Post
Update: Price to replace the airbox is $287. I'm going to leave it alone for now. If I happen across an airbox from a junker I'll probably swap it out.
Ditto. Lesson learned is watch the plastics in the engine bay. Zip ties offer greater strength than OEM. So I'm watching local yards as well.

Jon
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post #6 of 18 (permalink) Old 03-14-2017, 08:31 PM
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Just realized mine was broke too. Grr. Glue may not work but I bet JB weld putty will. ;-)
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post #7 of 18 (permalink) Old 03-15-2017, 07:09 AM
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Rich, in one of the other threads, I replied that I got a new lid for about $50 shipped. Keep checking car-parts.com and ebay. Lids are out there. Fixing the broken tree fixed my engine hesitation.

Jon
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post #8 of 18 (permalink) Old 03-15-2017, 10:44 AM
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Those hoses didn't seem to have vacuum I'm assuming they're part of EVAP system. Do you have a picture of what broke or to you replaced on yours? Also did it help your fuel economy? I've noticed the 1.4 is hard to get above 25mpg babying it at highway speed which doesn't sound right. I also need 3 software updates but they didn't tell me for what. I'm curious if those will help too.
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post #9 of 18 (permalink) Old 03-15-2017, 11:25 AM
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Originally Posted by Rich Richard View Post
Those hoses didn't seem to have vacuum I'm assuming they're part of EVAP system. Do you have a picture of what broke or to you replaced on yours? Also did it help your fuel economy? I've noticed the 1.4 is hard to get above 25mpg babying it at highway speed which doesn't sound right. I also need 3 software updates but they didn't tell me for what. I'm curious if those will help too.
Your assumption is correct. Those hoses are part of the EVAP system. I think it uses the boost pressure from the charged side of the intake to help create a vacuum to work the EVAP system. I could be very wrong on this though.

I only know this because I went and put a DIY short ram intake on my 1.4L Turbo. To connect everything I remade the EVAP lines with transmission cooling tubes since the PEX-style tubing FCA uses is really rigid. I originally didn't connect the EVAP line coming form the charged side (just capped it) and I got an EVAP CEL after my first new tank of fuel.

You may want to get the updates done just to see if it helps with the mpg, especially if you have the fiddly 9spd Auto. I Have the manual and can easily push 34mpg highway. I average about 28mpg combined.

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post #10 of 18 (permalink) Old 03-19-2017, 10:59 PM
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JB didn't hold. Seeing dealer tomorrow.
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