CZ unit vs stock ecu
Depends on how you tune it 
If you tune in open loop you're OK...if you tune in closed loop areas it will trim them out.
"Stage 2" maps have timing adjustments in the map....
If you tune in open loop you're OK...if you tune in closed loop areas it will trim them out."Stage 2" maps have timing adjustments in the map....
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Originally Posted by dannobre
Depends on how you tune it If you tune in open loop you're OK...if you tune in closed loop areas it will trim them out.
"Stage 2" maps have timing adjustments in the map....
If you tune in open loop you're OK...if you tune in closed loop areas it will trim them out."Stage 2" maps have timing adjustments in the map....
thanks
Ah grasshopper - you need to read CZ tuning for dummies
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From: Riverside, Ca
"open" loops where ur just using all the sensors to calculate the A/F ratio..... however in "closed" loop, thats where ur PCM looks at the O2 sensor n will use that to calculate the air fuel ratio......
"open" loop is where the ECU determines how much fuel is added with no feedback from the O2 sensors...."closed" loop is where the O2 sensors "feedback" info to the ECU so it can adjust to a specific A/F ratio
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