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Old 12-19-2009, 08:58 AM   #42
Vlad
Scooby Guru
 
Member#: 46135
Join Date: Oct 2003
Chapter/Region: Tri-State
Location: NY
Vehicle:
19 GLA45 AMG
C63 AMG

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As I've said, any leak from these is also possibly a sign of a small vacuum/pressure leak. It's a good idea to replace them.
My driver's side was missing, so that was a huge difference, but I decided to also replace the passenger side.

At the time I was watching the short term fuel trim like a hawk (was fighting the bank 1 lean code), so I definitely saw before/after changes to the trim. Before the passenger side replacement, the trim was hovering in the appropriate range, but only on the positive side. After replacement, I started to see negative numbers too, It became centered on zero..
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