





Tandi schreefColon@Remco : Hi Remco, kun je mij uitleggen wat je bedoelt als je zegt dat het voor een TF
" niet heel echt goed gaat " ?
Groetjes,
Hans


The Mems 3 system has two HO2S sensors one located in the exhaust manifold the other in the exhaust pipe downstream of the cat. The sensors provide feedback to the ECM which then controls the Air Fuel Ratio. The purpose of the sensors is to enable the AFR to be maintained at a level which produces the best exhaust composition for the Cat to work efficiently.
If an HO2S sensor fails, as in your system with it not in circuit, then the system goes into Open Loop mode i.e. it ignores readings from the sensors and takes values directly from the fixed maps without any compensation, which if your maps are not accurate or at least on the rich side could cause engine damage.
It will also store fault codes which can be retrieved by the testbook as well as lighting the MIL.
Mike is spot on regarding this 'problem' with MEMS3 - it simply is not compatible with a cat bypass tube Triggering the MIL actually causes the MEMS to run in 'fail safe mode' effectively dropping the engine's power output (and on a VVC engine, locking out the hotter cam profiles).
However, on the SELOC forum, I couldn't help but notice that someone has put together a MIL Eliminator kit
It seems to be fitted in place of the second HO2S sensor... a bit cunning this!
More details on this Lotus BBS archive thread





Andros schreefColonDat zou verklaren waarom mijn TF in 2010 op de dyno te weinig vermogen had (naast ontsteking destijds). Ik ben er laatst achter gekomen dat mijn katalysator hol is, dit zou dus problemen geven met MEMS 3 van een TF?

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