cold start issues - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

cotbu · 12-04-2014, 01:09 PM

Op, you need to let the temp reach 80c to be considered warmed up. That's about 176f at that time the 02 signal should fluctuate about 10 in 5sec. Don't quote that.

Now after your warmed up and the 02sig has been caught by the ecu then the afr should be 14.5-15.2 at idle. If you are richer or leaner? You may need a return or do some more diagnosing.

I would also verify that timing, and
re-sync as well.

Sent from my Slightly Tuned Note 4!!!

12-04-2014, 01:09 PM	#4
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 50 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Op, you need to let the temp reach 80c to be considered warmed up. That's about 176f at that time the 02 signal should fluctuate about 10 in 5sec. Don't quote that. Now after your warmed up and the 02sig has been caught by the ecu then the afr should be 14.5-15.2 at idle. If you are richer or leaner? You may need a return or do some more diagnosing. I would also verify that timing, and re-sync as well. Sent from my Slightly Tuned Note 4!!! __________________ LoverTechnologies "Half Broken Things!"