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Discussion Starter · #1 ·
Can anyone suggest a quick list of things to check for high emissions. I guess they will be the same on virtually any 155. Ideal if anyones got the resistance etc for Lambda & AFM sensors etc..

cheers,
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Discussion Starter · #2 ·
make sure there are no leaks in the exhaust then check for vac pipe and intake leaks.the last two things are temp sensor and lambda...if its the Q4 check all the intake pipes they are known for splitting.
 
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