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Old 01-06-2010, 10:39 AM   #4 (permalink)
rgathright
EcoModding Apprentice
 
Join Date: Aug 2008
Location: Lake Charles
Posts: 193

Black Beauty - '09 Honda Accord EX-L
90 day: 27.44 mpg (US)
Thanks: 12
Thanked 12 Times in 11 Posts
Interesting...

A clogged cat could be restricting your engine on the Mercedes. If it has computer capable of fuel trim, it might be leaning out your injector timings.

Does the car drive sluggish during hard acceleration?
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