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| 10-03-2014, 02:28 PM | #1 |
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Private First Class
 
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What line is this?
Okay so my car has been idling rough lately, I just found a leak where I least expected. Just wondering what the line exactly is and where it comes/goes to. Its NOT the red arrow but the YELLOW one. Thanks guys!
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09' Crimson Red 135i - FBO, E50, PTF tune, cool stickers |
| 10-03-2014, 02:29 PM | #2 |
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Captain
 
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Plastic pipe is vacuum for the brake booster. Small rubber hose is supply for exhaust flap.
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13 X1 35iX, 98 Z3 2.8, 01 M Coupe, 96 Z3 1.9 DASC, 95 318ti, 13 smart fortwo
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| 10-03-2014, 02:45 PM | #3 |
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Private First Class
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awesome thanks a lot man! not the cause of my rough idle then, but hey a leak is always bad haha.
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| 10-03-2014, 04:13 PM | #4 | |
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First Lieutenant
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Quote:
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| 10-03-2014, 04:42 PM | #5 | |
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European Editor
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Quote:
 Even a leaking valve cover gasket or loose oil cap - can cause a vacuum leak/rough idle. That's why those small parts are also covered under the federal emissions warranty.  It's more likely a rough idle is caused by  in this order...) worn spark plugs, bad coil(s), dirty injectors, and or carbon buildup on the intake valves. Dack
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| 10-03-2014, 05:36 PM | #6 |
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Private First Class
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Thanks a lot guys! Sadly it did not fix my rough idle, but glad I got it fixed regardless. Have new injectors and plugs. If anything I know its due to the fuel pump, been pulling the fuel pump plausibility code for a few months now. Also it has 43k miles with no valve cleaning done yet. Still under warranty though so trying to get both covered but the dealership isn't budging. Maybe towards the end of my warranty next year they will just do it.
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