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rough idle, no codes

 
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Just Try It1 Just Try It1
Moderator | Posts: 2796 | Joined: 08/14
Posted: 09/14/18
01:18 AM

do you have vacuum power brakes on that..

disconnect the power brake booster hose and plug it.. see if the engine idles smooth again..

bad power brake boosters are issues.. VWs from the mid 90s up have nylon tubing that splits and throws off the whole air fuel calculations..

you can hook your smoke machine to the same connection the power brake booster was hooked to..  

Just Try It1 Just Try It1
Moderator | Posts: 2796 | Joined: 08/14
Posted: 09/17/18
04:34 PM

any air leaks that are NOT measured thru the air flow meter will have horrible effects on the idle fuel mixture.  

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