A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

Can some help me with *possibilities* of a fuel/mileage problem ?

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Old 05-21-2003, 11:05 AM
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mxp
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Default Can some help me with *possibilities* of a fuel/mileage problem ?

Car still under warranty, and I know something is wrong, and I don't want the dealer to tell me nothing is wrong. How shall I articulate the problem to the dealer?

Lately, I am getting lower mileage per tank. Even with mostly highway, I get 270 miles max. 320+ is normal for me as I drive conservatively.

No CELs annd no error codes.

Only thing I noticed was occasional rattling sound from the cam shaft tensioner or the kombi valve(smog pump) at certain low rpms. this sound is easily replicable.

A search on AW archives yielded a possible vaccuum leak at hoses connecting the secondary air pump.

What are the possibilities for this sorta fuel/mileage problems and how do I start trouble-shooting.

Thanks for your help, AWers.
Old 05-21-2003, 11:07 AM
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Default vacuum leak, faulty MAF, dirty injectors - try throwing some techron into your tank

at your next fillup and see if that helps.
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