Subject	To be more accurate in that first statement...
Posted by	DVDBURN (MD) on August 31, 2013 at 10:24 AM
	This message has been viewed 288 times.
In Reply To	Tim, I found that the ECU open loop operation is based on posted by DVDBURN (MD) on August 31, 2013 at 09:47 AM
Message	"The ECU open loop operation is based on the initial reading of the temp sensor when you first start the car. In other words, if the ECU receives a signal from the temp sensor at startup, the ECU will use that value to calculate the time it needs to switch from open to closed loop operation or the time it takes to reach 140 degrees." If there is no signal from the temp sensor the ECU will still switch from open to closed loop operation in 4 to 4.5 minutes. It will just run like crap because it isn't receiving a signal from the temp sensor to calculate for best efficiency. If you monitor the temp sensor with diagnostic software with the temp sensor disconnected you'll see that it appears to always be 176 degrees after 6 minutes of the car running. www.mytwinturbo.com Nissan Data Voice - The first Nissan diagnostic software with a voice! Nissan Data Voice on YouTube Download my Nissan 300ZX Vin/Model Lookup.
Follow Ups	O2 sensor issues, car running rich all the time. Need advice - Woody75 (Denver) 23:35:02 08/30/13 Coolant temp sensor?.. - Cjw3 01:04:52 08/31/13 seems to be working fine. - Woody75 (Denver) 07:42:40 08/31/13 Tim, I found that the ECU open loop operation is based on - DVDBURN (MD) 09:47:51 08/31/13 That's a nice little tid bit to file away.. Thanks (n/m) - Cjw3 09:54:02 08/31/13 To be more accurate in that first statement... - DVDBURN (MD) 10:24:45 08/31/13 Thaks for the info. - Woody75 (Denver) 11:04:44 08/31/13 Sounds like a stuck injector to me... (n/m) - ChaseGrayTT 18:36:25 08/31/13 Hey Woody! - ChaseGrayTT 07:25:40 08/31/13 cas is good. everything is firing and reading right. - Woody75 (Denver) 07:46:16 08/31/13 dont the o2 reads .34 if unplugged? - toykoz32 12:02:08 08/31/13 Most ECUs are usually .32 without O2 feedback but I have... - DVDBURN (MD) 19:48:01 08/31/13 Check with wide band O2 sensor - jerdobi 18:47:18 08/31/13 k value is correct - Woody75 (Denver) 19:14:41 08/31/13 Something's not right with the o2 sensor circuit. Those - Evan_Wright (Ca) 00:41:35 09/01/13 Have the injectors tested or test them yourself, or swap in - ZaXxon 05:34:12 09/01/13
Post a Followup	You cannot reply to this message because you are not logged in.