my daughter's 2008 Rabbit (2.5) started running really badly and threw a CEL. Had it scanned it based on what came back, sounded like a bad MAF. Replaced it and it ran worse. Almost won't stay running with it plugged in. With it unplugged, it'll run but really rough. Thought it seemed like a vacuum leak so I started poking around and found a broken vacuum line that connects to the cold air intake in front of the valve body. I took the hose to the parts store (first mistake) not actually knowing what is was SPECIFICALLY called and they were useless of course. I hacked up a temporary fix by taping up the break for now, but it didn't help the car run better (without the new MAF connected and worse again with it connected).

I looked for a parts diagram on line, but the best I could do was the attached image. The line I'm talking about connects the red circled port and down onto the block (intake?). First, can someone please tell me what piece/hose that is, and what to call it or how to order it.



Can I just replace the crappy plastic flex tube used for these vac lines with a classic rubber hose if I can't find the part?

What else can I check? Is there anything this engine is notorious for that is easy to check/test?

Thanks all!!

 

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You need to get your motor scanned (preferably with VAG-COM\VCDS) for any error codes logged in the ecu and post them, that will save a lot of guessing and check systems out.

eg.

Manufacturer: VW, Date(s) Used: 08/1977-08/1980, Model: Rabbit, Engine Code: FX, 46Kw, 62PS, 1.5 Ltr, 4 Cyls, Remarks: Rabbit in USA, Golf in Canada, Caribe in Mexico
Manufacturer: VW, Date(s) Used: 08/1975-07/1976, Model: Rabbit, Engine Code: FN, 55Kw, 75PS, 1.6 Ltr, 4 Cyls, Remarks: Rabbit in USA, Golf in Canada, Caribe in Mexico

Post the engine code of this 2008 Rabbit (2.5)?

Please tell us your car spec in your signature

Post approved.

 

I looked for a parts diagram on line, but the best I could do was the attached image. The line I'm talking about connects the red circled port and down onto the block (intake?). First, can someone please tell me what piece/hose that is, and what to call it or how to order it. <Speed Test