Posted on Apr 20, 2009

1989 Audi 90 Quattro problem

My son has a '89 Audi 90 Quattro that has trouble running in warmer temps and also it appears when the gas is less than 1/4 tank. When he bought the car he was told that it may need a fuel pump but it has been running fine until we started having days in the upper 50s or higher. The car will then 'flutter' like it's having problems running. When my son got off work the other day and temps were close to 70 the car would not stay running but today with temps in the lower 50s, the car started fine and got him home. any ideas?

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Anonymous

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Posted on Feb 28, 2010

Anonymous

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Try changing the fuel filter, first. If that does not work try replacing the pump. Also make sure you run 91 or higher octane.

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