mfg Posted January 20, 2019 Report Share Posted January 20, 2019 On all year Avantis, a split brake booster diaphragm (from age) will result in two major driveability problems.....one is poor braking, the other is........?........ Link to comment Share on other sites More sharing options...
r1lark Posted January 20, 2019 Report Share Posted January 20, 2019 Poor engine performance at idle due to the vacuum leak (been there, done that on a disc brake Lark). Link to comment Share on other sites More sharing options...
mfg Posted January 21, 2019 Author Report Share Posted January 21, 2019 17 hours ago, r1lark said: Poor engine performance at idle due to the vacuum leak (been there, done that on a disc brake Lark). Yes, that's it exactly! Link to comment Share on other sites More sharing options...
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