mfg 0 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........?........ Quote Link to post Share on other sites
r1lark 0 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). Quote Link to post Share on other sites
mfg 0 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! Quote Link to post Share on other sites
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