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Old 02-13-2015, 06:10 PM   #1
pacificjohn
Registered User
 
Join Date: Feb 2015
Location: 92649
Posts: 11
My Ride: 2000 328i
Fixed stalls, lean codes, no power

Posted prior but new more extensive information.
and background for stalls, lean codes, no power.

Using Torque Pro.
General:
2000 BMW 328i bought new 180K mi.
codes P1189 P1188 P0170 P0173 P0150
Ready Monitor is Closed Loop after warm up.
Runs good all conditions with MAF disconnected.

replaced :
Thermostat
DISA 'O' ring
Throttle body Seal Ring
Boots both BMW.
CCV and all hoses
Pre Cat O2 sensors replaced Bosch 13477 But The Voltage graphs look suspect..
SAP air hose bad fixed, and toasted Vacuum line.
switch OK. This was not a cake walk more difficult than CCV and all hoses
(there must be a trick to get the SAP vacuum switch out).
SAP runs when cold.
Fuel Pump
Fuel Filter
Clamped the Brake Vacuum line, no change.
Smoke Test ok

Went thru almost all of the jfoj 20 points.

Background up to phase 2:
STFT 1 and 2 go to 27% at warm up. LTFT at 0.
O2 sensor voltage on bank 1 goes to .04 shortly after start.
(This voltage seems odd both start at 0.4 VDC
also cannot get the O2 Voltage graphs to match others ?)
O2 sensor voltage on bank 2 Takes longer then sticks on ~.04
Then during cruise STFT stays at 27% untill im at a stop sign,
then after a time 1-2 min goes down to 0 both sides.
After that it does one of two either they come back on accelerate or
If it stays at 0. Miss Fire and acts like Fuel pump (new VDO) low power
Sometimes recovers with STFT at 27%.
During longer cruise they typically stay at 27% all runs good.
There must be something I am missing.

PHASE 2
Suspected NEW Bosch 02 sensor #13477 so replaced with Orginal #2 pre cat O2 which had a good graph .
Just to be sure recheck the Fuel pressure ok, sits at 50 psi with key on.
Remove the test gauge and
Start Engine for a test run with swapped O2 sensor #2:
At first there seems to be no change as it too seems stuck on .45V (this is cold non operating voltage).

Took this for a short run around the block.
OMG now the STFT are reading -5% to -10% +- for the first time and 02 Voltage is toggling above .45V.
I am thinking did I get a bad Bosch O2 sensor?
I continued on my treck.
Now O2 direct voltage is reading .9 up and down to .02 for both sensors.
I believe DME is hunting for correct STFT and now zeroing in on it.
Continued drive, noticed SES light:
Now only code is P1188 and P1189, Ok this is good thing at least its only running against the
Trim limits and no lean codes.
Now I believe this: DME with bad O2 sensor cannot reslove the lean rich algorithm
between the two banks without the O2 sensors responding. The DME trims to limits cause the lean mixture.
This is a result of the O2 Sensor not responding to the DME adjustments.
At times DME resorts to 27% limit and engine runs but not all will hold. At the first
stop and Idle you get DME readjust STFT to 0. Step on gas and misfires similar to
bad fuel pump.

I hesitate to say but I think I got the worm.
There may be other items but at least I hit one BELL and in the process and
wiped out unforeseen others.
Yes beware as a faulty new item will throw you way off track.
screen shots and CSV attached.
I will post updates.
Any comments are welcome ( I am new to the BMW diagnostics Center, lol)
At this point thanks to all for information and advise. I'll be back.

https://www.dropbox.com/s/w5vb81z2ub...12-55.csv?dl=0
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Old 02-13-2015, 06:36 PM   #2
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 14,366
My Ride: 330CiC, M5, X5
FYI, O2 sensors are just this sensors, they respond to what level of Oxygen is in the exhaust stream, they are not driven or adjusted by the DME in anyway.

Not sure why you only have Bank 1 O2 sensors in the graph other than Torque gets stupid and times and you have to blow out all of the sensors that are being logged and add the O2 sensors FIRST then add the engine RPM and vehicle speed, coolant temp, Fuel Trims, etc.

Overall BANK #1 Pre and Post Cat sensor behavior looks pretty decent, would like to see ALL O2 sensors also with a 3 minute cold start and then a 3-5 minute warm idle as well as a steady cruise.

Need to also make sure you did not swap the O2 sensor banks when connecting them to the engine bay wiring harness. The engine bay connectors have NO markings or labels and it can happen that people mix up the O2 sensor connections.

Suggest you check these links -

http://forum.e46fanatics.com/showpos...0&postcount=27

http://forum.e46fanatics.com/showpos...0&postcount=26
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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Old 02-14-2015, 12:15 PM   #3
pacificjohn
Registered User
 
Join Date: Feb 2015
Location: 92649
Posts: 11
My Ride: 2000 328i
Thanks for your help on this.

Turns out this am, its back to same set of lean codes.
Looks like I did not get the worm for long.
Could it be an intermittent vacuum leak?
Couple of things;
Sensors seem to go to low and not oscillate, as they did yesterday (your point about the DME adjsment is correct,
DME does not adjust the O2, it only reads it. I ment to say the O2 voltage should change when DME adjust
the STFT)
DME sets STFT to 27% and runs ok, but ildle for 1-3 min and STFT goes to 0, then no power. Press hard on gas and they restore and power ok.
O2 sensors are on 0 but all start at .4V
I did re-list the Torque App with 02 voltage first. Still at mostly 0.
Temp rise seems slow, its new and said 93 degree C.
What about MAF, I have not put this on the order list per your recommendations.


Cold Start on first header: Short trip second header.
https://www.dropbox.com/s/bkdkqn3fu3...54-09.csv?dl=0

Last edited by pacificjohn; 02-14-2015 at 12:17 PM.
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Old 02-14-2015, 03:04 PM   #4
jfoj
Registered User
 
Join Date: Nov 2009
Location: Fairfax, VA USA
Posts: 14,366
My Ride: 330CiC, M5, X5
Not sure what you have going on here.

Not seeing a Torque Log with ALL O2 sensors, Fuel Trims, RPM, Speed and Engine Temp.

If the O2 sensor Voltage is going very low, likely WAY too much Oxygen in the exhaust due to a Lean mixture, misfiring or an engine mechanical problem.

Something is really wrong here and does not make a lot of sense, the problem should knock you out of the seat and not be hard to find.

High STFT are usually due to crankcase air leaks and/or a bad brake booster if the LTFT are not too far off.

http://forum.e46fanatics.com/showthread.php?t=1057387
__________________
Solve your misfires, lean codes, rough idle - http://forum.e46fanatics.com/showthread.php?t=897616

Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temp, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose temp switch O-ring - BMW #13621743299
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