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CA18DET CPU differences

 
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towbar



Joined: 14 Apr 2011
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PostPosted: Thu Apr 14, 2011 10:42 pm    Post subject: CA18DET CPU differences Reply with quote

Hi.
I am new to tuning Nissan ECU's and I'm hoping for a little advice. I have a CA18DET 200SX. It is a New Zealand model and has no CAT converter or O2 sensor. I am purchasing an Eprom programmer to do some DIY tuning and I was wondering I can fit an O2 sensor to this ECU for better fuel economy. Does anyone know if the ECU is the same for CAT/NON CAT models? Can I just wire up the O2 sensor and alter the program to suit?

Thanks in advance

Jeremy
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skyshack



Joined: 09 Feb 2006
Posts: 8
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Location: Burton on Trent, UK

PostPosted: Fri Aug 10, 2012 8:27 pm    Post subject: Reply with quote

UK spec CA18DET will run closed loop from lambda on non lambda ECU in late lambda equipped car.

What's missing from non lambda ECU is the transistor to switch on the lambda heater. This means it takes a bit longer to warm up and can cool off on overrun or idle.

What's missing from non lambda car is the lambda connections at ECU, loom wiring and lambda plug.

I have no idea how a lambda ECU or ROM in non lambda ECU gets on with the mixture screw on non lambda AFM.
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