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Snapped a vacuum line

 
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Old 28 Oct 2012, 06:50 pm
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Default Snapped a vacuum line

While installing a new set if iridium plugs and MSD plug wires, I accidentally snapped the (brittle) vacuum wire coming off the intake plumbing next to the MAP sensor.

I put a temp fix on it (see photo) by using the insulation from some marine-grade 10-gauge battery cable, but I'm not sure how long that will hold up, so near the heat from the turbo.

Has anyone done this before? Is it best to replace the entire line, or can you just use a female connector attached to both broken pieces much like I attached the wire insulation?

Unfortunately, after doing the spark plug/wire change, I still have a very rough idle, especially with the A/C on, so I guess I will have to continue searching for the cause of that issue. I was hoping the plug wire upgrade from stock Mopar wires would do it, but nope, still rough.



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Old 28 Oct 2012, 07:16 pm
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Default Re: Snapped a vacuum line

Can you get to both ends of that vacuum line? If so, I would replace the whole line if it's that brittle.

As far as a rough idle with the A/C on, check that the fan is coming on when the A/C is on. With a Turbo, you should have a variable speed fan whereas the non-turbo has two speeds. If the fan isn't cooling the coolant and the compressor, you'll feel that stumble as the compressor is putting strain on the engine.
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Old 28 Oct 2012, 07:46 pm
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Default Re: Snapped a vacuum line

I agree with CREWZIN. If it's that brittle, it needs replaced. There is an option for ordering a new line, if the rubber connectors are still good. You can buy this type of line in bulk sticks at NAPA. It can be formed to almost any shape, if you apply heat carefully, and cool it quickly.

A better temporary fix would be to use a piece of rubber vacuum line that fits the plastic tightly.

I have used this type of line for many years. GM stopped producing the EGR vacuum harness for CREWZIN's Vette many years ago. I used this product, a heat gun, and a cold towel to reproduce the harness for my customers.

Ron
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Old 28 Oct 2012, 10:05 pm
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Default Re: Snapped a vacuum line

does anyone know where it goes when it comes out of the group of wires and lines on the passenger side?

I do know my fan is coming on when the A/C comes on, not sure how FAST it is running, just that it is on.

The idle is a bit rough even with the A/C off, but not nearly as rough as with it on.

Starting to think that the IAC motor may be the problem

Last edited by trooplewis; 28 Oct 2012 at 10:36 pm.
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Old 28 Oct 2012, 11:18 pm
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Default Re: Snapped a vacuum line

Turbo is likely different from NA that I know.
Where does the end of the vacuum line that you see go?
It may be he vacuum for the cruise control (if connected to the intake manifold) or perhaps (if connected to top of throttle body) to the purge solenoid.
Do you have sticker on the upper radiator support that shows the vacuum line routing?

Quote:
Originally Posted by trooplewis View Post
does anyone know where it goes when it comes out of the group of wires and lines on the passenger side?
...
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Old 28 Oct 2012, 11:52 pm
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Default Re: Snapped a vacuum line

I'll have to check tomorrow and see if there is a vacuum line diagram
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Old 30 Oct 2012, 06:21 am
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Default Re: Snapped a vacuum line

A vacuum leak can cause idle problems...the brittle line may have another bad spot...probably best to replace the whole thing. Also, be sure intake manifold seal is OK.
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Old 30 Oct 2012, 06:42 pm
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Default Re: Snapped a vacuum line

This kind of stuff happens all the time on turbo cars (in general, not just PTCs). Go to your local speed shop and get 2" of 3mm silicone (it's stretchier than rubber) vacuum hose and slip it over the ends of the plastic line forming a splice. It'll be fine.
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Old 30 Oct 2012, 08:29 pm
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Default Re: Snapped a vacuum line

Went to the local Dodge dealership to order the vacuum line from the parts counter, right up to the "its' $65 plus tax special order, pay in advance" part.

Left the Dodge dealership and went to O'Reilly's auto parts, and got this for $3.99. Done.

I did have them run a history on my PT, found out the coolant and Trans fluids were changed out 10k miles ago, so that saved me some $$ and time.

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Old 01 Nov 2012, 11:26 am
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Default Re: Snapped a vacuum line

If the inside of that wire insulation piece isn't smooth (I doubt it is), you'll still have a vacuum leak.
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