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SL55/63/65/R230 AMG: what could be the problem ? system too lean

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Old Apr 1, 2010 | 07:07 PM
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SL63_AMG
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From: Arlington ,VA
sl63 Amg 09
what could be the problem ? system too lean
My car:
2009 SL63 AMG.

Mods
Custom x pipe (replaces the 2nd cats and resonators )
RENNtech ss headers
RENNtech ECU

checked the airbox and the exhaust.( no air leaks from the airbox or the exhaust)

plaese help
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Old Apr 2, 2010 | 12:49 AM
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super_monkey
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sl55
ECU? Oxygen sensor? System too lean means too much air and not enough fuel.
Last edited by super_monkey; Apr 2, 2010 at 12:52 AM.
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Old Apr 2, 2010 | 01:35 AM
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IngenereAMG
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SL55AMG, Ferrari 348, Ferrari Testarossa, Ferrari F40, Ferrari Mondial t, Ducati 916, Indycar
Sounds like ECU to me.
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Old Apr 2, 2010 | 06:33 AM
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sl63 Amg 09
Originally Posted by super_monkey
ECU? Oxygen sensor? System too lean means too much air and not enough fuel.
the dealership tested the oxygen sensors and they are working properly. they think that the tune is causing the problem.
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Old Apr 2, 2010 | 06:40 AM
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sl63 Amg 09
Originally Posted by IngenereAMG
Sounds like ECU to me.
thank you , i contacted RENNtech and they think that the problem is with the ECU ( hardware ) is not working properly. any thoughts ?
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