Alfa 156 2.0 JTS rich on idle - Alfa Romeo Forum
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Alfa 156 2.0 JTS rich on idle

What might cause this engine to run rich on idle. With higher rews its better but not perfect at least I think so.
Are those precat lambdas wideband or narrowband lambdas. By the voltage they seems to be wideband but as they react to throttle they look like naroowband
Just to show you whats going on I post some screenshots
At idle
and stationary at around 2000 rpm.
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156 , alfa , idle , jts , rich

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