O2 sensor headache

[chamallas]

So here's the deal. I drive a 95 318i and it is in good condition. About a month ago the check engine light came on and when i checked it out it was a bad O2 sensor. I changed it today but when i did the surging (in first and second gear) became much worse, almost to the point where i can't even use them. I thought that it might be because i need to reset the computer but when i did the the problem persisted. This is all i know and when i called the mechanic that put it in he said he was stumped untill i could bring it in next week. There is one other piece of information that may aslo be of interest. I don't have a speedo on my car becase a screw came loose in my differential and bent one of the fins that reports speed and the bent fin breaks off the sensor as it goes around so i cannot fix it till i change oer the entire differential but this has been this way for a long almost a year. This is the first time i have ever tried a BMW forum so if i made any ediquite mistakes please forgive me and tell me the right thing to do, and if you have heard about this problem before i would sure appreicate soem feedback.

Thanks in advance,
Nicholas

 

[Wadula]

welcoem to the board nicholas.

sorry, but that kind of problem is completly new to me. and somehow i do not get the point with the poll??
other than that, have fun with the car and good luck fixing.

 

[cgm451]

Did you have any luck getting it fixed? My 1992 325 has check engine, 1221 code, but only surged twice (I thought it was unrelated) in the last 2 months since the light came on. Going to change the o2 sensor when I can find one cheap. Has anyone out there had trouble replacing an o2 sensor, I thought it was just out with the old, in with the new...wham bam...well you know the rest.

 

[chamallas]

got it

yeah i found a large hole on the bottom of the intake boot. that was why the O2 code was coming up. It was just happenstance that the surging got way worse when i changed the O2 sensor. If you live in a warm place then you probably wont notice the surging as bad or as quickly. i would check around the engine while it is running for a leak and pull the throttle to make the engine rock a little to see if anything opens up. Goodluck my man.