Air intake leak

2008 VOLKSWAGEN JETTA
194,000 MILES • 2.5L • 5 CYL
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GRANT EMERSON
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Changed the MAF sensor and EVAP purge valve. Still getting two codes P0171 and P2279. Checked all the air intake connections and no leaks i can see hear or find. Any ideas?
Oct 29, 2017 at 4:27 PM
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SATURNTECH9
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Have you checked to see if the intake manifold bolts are loose? It is extremely common for them to loosen up on that engine happens all the time.
Oct 29, 2017 at 4:51 PM
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GRANT EMERSON
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The intake is all plastic hoses with squeeze clamps holding the connections together.
Oct 29, 2017 at 7:05 PM
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SATURNTECH9
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The intake manifold is held on with Allen headed bolts they loosen up and cause a vacuum happens all the time. you will need a long ball Allen socket to tight all of them up.
Oct 29, 2017 at 9:50 PM
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SATURNTECH9
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I take it the intake manifold is attached to the head of the engine with these bolts?
Oct 29, 2017 at 9:54 PM
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SATURNTECH9
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So we're the Allen bolts holding the intake manifold on loose?
Oct 30, 2017 at 9:11 PM
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