Idle cell normally is 16. WOT is usually 15 or 18.

 

In open loop, it runs in Cell 16 at idle, and Cells 17 and 18 when under load. It uses the BLM's that are stored in that cell.... and only locks the integrators at 128. Is doesn't lock the BLM's at 128 in open loop.... it simply blocks any further "learning". Obviously the 160BLM is driving the pulse width higher on that side.

The "timeout" on closed loop is a "variable".... seems to take longer in the winter than in the summer for example. He has been running 2min 27sec, so its a close call. But.... the 453mV is exactly what you get from the O2 sensors when they aren't working. Start the car cold, and you will see a number close to 450mV... that's because the PCM supplies the 450mV bias, and the O2 sensors are still cold and not generating any voltage of their own. Did you check the heater circuits for the O2 sensors?

No. See explanation on first item above.

His BAR is 100kPA.... normal. His MAP reading is in Volts = 1.56V = approx 10-11"H2o = 35-38kPa... not that far off from a stock cam.

Cell 16 is the IDLE cell. There is no "WOT" cell, although it will generally use Cell 15 if you are adding fuel, and Cell 18 if the BLM's were subtacting fuel. Sounds like some misunderstanding of how things work.

"Integrators" are the "short term fuel corrections. This is what the PCM sets "temporarily, based on O2 sensor feedback, and adjust each time it cycles through the control process, about 9 times per second. If it see that the INT's are above or below 128 for an extended time, it then alters the BLM, or "long term fuel correction".... a more "permanent" number that is stored used until another problem with the INT's occures.

Might want to reas this VERY carefully.

http://members.aol.com/InjuneerZZ/ScanMast.htm

In summary, your O2 sensors aren't working, and you have a serious problem on the right side of the engine with regard to fuel control. But looking at one frame from a "cold start" condition is next to useless. Run a data log that shows a few minutes of "normal", warmed up driving, and do a brief WOT blast to max RPM in one gear. Then post the results for people to look at.

 

Im idleing real rough like I have a cam .... but its stock im going too, check plugs,plug wires, maf,02 wires,and vacuum leaks , Isn't there spose to be a code thrown if the opti is going out , also my problem is at low rpm for the most part it seems too slightly go away the more gas that is pushed, stilll lingers , I'll let you all know I figure it out

 

well i found a couple problems right off the bat , the first was that the third plug back on the passenger side was loose in the head i could spin it with my fingers, and one of the coil grounds on the coil was off replaced that , didnt drive it that much after that but it seemed to help for the time I drove it

 

I hope my todays findings are related to your problem......

One day I parked in the morning... car running very smooth. Went I went back to start her same day at night... the engine was running very rough... and I herd this weird clickin noises in the back.... as it turns out it was backfiring.. It has been like that for four days, however today I got under her and removed the diver side cat to gain access to everything down there...

I found sparkplug number one had lots of dry deposits on it and the ceramic part was light brown but no carbon deposits... hard to describe but it look like rust. A careful look at the ceramic insert revealed a hairline crack on it.... Bingo!! I know this crack will cause the spark to happen away from the tip and inside the sparkplug area.... I have read this causes timin to retard a bit too... So I pulled all the other spark plugs and they look perfect!!!! and I mean clean and perfect!!!

I replaced the oil lever sending unit (leaky) two brand new AC delco oxygen sensors, did an oil change, and I will replace the spark plug wires (I did one side already).

I hope this fix my missing,, misfiring and backfiring.... oh and at one point it look like I had a vacum leak too....maybe this is related to the spark plug not working properly.

Just to let everyone know.

Marvin