Please help me diagnose my car

[m3f_firespydar]

is that something i can pull with bmw inpa ?



Can you get me you fuel trim reading, additive and adaptation. Thats what BMW calls them.



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[m3f_itsme]

is that something i can pull with bmw inpa ?


Yes you can. Or even an aftermarket obdII scanner.


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[m3f_firespydar]

i just finally figured out how to pull those adaption and adaptive.. please help me review it.. it didnt have any numerical value..



http://i275.photobucket.com/albums/jj292/firespydar/INPA-Loader_B.jpg

[m3f_brichter]

i just finally figured out how to pull those adaption and adaptive.. please help me review it.. it didnt have any numerical value..



http://i275.photobucket.com/albums/jj292/firespydar/INPA-Loader_B.jpg





They do have a value, it's 0.



It's 0 because you've never achieved closed loop.



You've never gotten to closed loop because your O2 voltages are pegged.



You're spending too much time looking for unrelated issues (smoke test, cam sensor) that have nothing to do with your problem.



You need to fix the o2 sensor voltage problem that the DME is seeing...



How did you rebuild the engine if you only took the cylinder head off? :clueless:



Here's what those values are for:

http://forums.bimmerforums.com/forum/showthread.php?t=1724351

[m3f_firespydar]

brichter, thanks for pointing that out to me.. i rebuilt the cylinder head, replaced the head gasket, along with oxygen sensors, spark plugs, i will re-focus my efforts to closing the loop in the oxygen sensor, i know i have to break out the multi-meter and start testing their values and chasing the lines, the oxygen sensor has four pins... do know what the combination pin is and what values am suppose to get for testing ?

[m3f_brichter]

One pair will be 12v, that's the heater circuit. These are usually white on the sensor side.The other pair will be the sensor signal pair. These are usually gray and black on the sensor side. Both these are from my memory of a car I haven't owned in 15 years, and could be different depending on if the sensor is OEM or not, so don't trust my dusty old memory!


You need a wiring diagram for the DME system. I don't have the wiring diagram any more, I sold my Bentley manual when I sold my E36. You should buy a manual or at least see if you can find one online, the wiring is different for every DME system and if you don't have the right info, you're just wasting your time.

[m3f_FNS_M3_e604c53c2b]

brichter, thanks for pointing that out to me.. i rebuilt the cylinder head, replaced the head gasket, along with oxygen sensors, spark plugs, i will re-focus my efforts to closing the loop in the oxygen sensor, i know i have to break out the multi-meter and start testing their values and chasing the lines, the oxygen sensor has four pins... do know what the combination pin is and what values am suppose to get for testing ?



not sure if this is helpful, but here's the wiring colors for the O2 sensor plug:



#1 Brown = Heater ground

#2 Black = Signal ground

#3 Red/White = positive +

#4 Yellow = Sensor signal

[m3f_brichter]

not sure if this is helpful, but here's the wiring colors for the O2 sensor plug:



#1 Brown = Heater ground

#2 Black = Signal ground

#3 Red/White = positive +

#4 Yellow = Sensor signal



What year/engine/DME?

[m3f_firespydar]

its a 97 bmw m3, s52, i think the dme Part # is 1406464

[m3f_itsme]

its a 97 bmw m3, s52, i think the dme Part # is 1406464


Have you check you o2 sensor outputs yet?


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[m3f_FNS_M3_e604c53c2b]

ETM tells me it's for OBDII m/s52, up to 1998. 1999 seems to be slightly different.



What year/engine/DME?

[m3f_firespydar]

Currently working on it.. right this moment..



Have you check you o2 sensor outputs yet?



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[m3f_firespydar]

my oxygen sensor has four wires.

black



red



yellow



white





i used my multi-meter to test it and it seems fines. Am not sure if i have the wires right. but from my search am suppose to be testing the black and red for the signal.



i get a wiring diagram tomorrow, is it possible for me to test the wiring harness to the dme?



am i suppose to be checking the volts or ohms across the red and the black ?



what should the result reading be ?

[m3f_itsme]

my oxygen sensor has four wires.

black


red


yellow


white


i used my multi-meter to test it and it seems fines. Am not sure if i have the wires right. but from my search am suppose to be testing the black and red for the signal.


i get a wiring diagram tomorrow, is it possible for me to test the wiring harness to the dme?


am i suppose to be checking the volts or ohms across the red and the black ?


what should the result reading be ?


Have your meter set on DC voltage, range 0-5v. Black test lead to blk wire and red test lead to yellow wire according to the info provided in the previous post. I don't have the wiring diagram but it looks correct.


Once the car is warm up have someone hold the idle at 3k rpm and the voltage should sweep from 0 to 1 volt smoothly.


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[m3f_firespydar]

i just finished checking the O2 sensors with the computer, the lambda-sensor voltage 1 and 2 both rests at 4.75 during drive and WOT it moves to 1.1-1.6 for a couple of seconds and goes back to 4.75, the "monitor sensor 1 and 2 after cat" is consistently at 4.71...it wouldn't change until i hit about 100 mph whiles monitoring live data, then it moved to 3.12 and then back to 4.71.... for a very short second. i tried using the multi-meter but couldn't get any readings perhaps wasn't hot enough ? it takes my car about 5 to 6 cranks to start the engine when engine is cold and when it starts the idling is very rough after a short drive check engine lights up with the same four codes



202 fuel trim limit Bank 1

203 fuel trim limit Bank 2

227 fuel trim, Bank 1

228 fuel trim, Bank 2





should the oxygen sensor be affecting my start characteristics ?