95 740iL rough idle no power help! - BMW Forum - BimmerWerkz.com
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#1 (permalink) Old 10-01-2008, 09:53 PM
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95 740iL rough idle no power help!

I bought this beauty a few weeks ago with the rough idle, the car cant get out of its own way no power. need advice please. the following has been done leak test,plugs checked.MAF sensor replaced, no oil around plugs.no head leaks,cleaned ICV.After code reader was used the codes came up for Lamda c/u #1&2. I'm kinda at a loss should O2 sensors be replaced? could it be the injectors need cleaning? would it be plugged cats? could it be the OSV? also code came up for #4 cylinder coil pack put in new, code went away but still runs rough. I was told the loss of power could be that the tranny may of went into limp mode! and will reset after the lamda issue is resolved ,hope some-one can help
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#2 (permalink) Old 10-02-2008, 02:56 PM
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PCV valve? Is it an E38 or E32 ?

If its a 38 which I think it is as the year:

OSV [Oil Separator Valve] replacement enclosed.

Did mine last week, now a new car, had the same as you.

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#3 (permalink) Old 10-02-2008, 03:12 PM
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Thanks its an e38 ,we'll give it a go of course after I order it,and will post if we have sucess. Thank you
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#4 (permalink) Old 10-30-2008, 10:12 PM
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Well, we rereplaced the OSD did not work but pulled the o2 sensors and started her up and ran fine! Catyltic converters clogged so we replaced them with magnaflows, runs fine! now new front brakes,rear upper control arm and a change of the differential fluid hopefully away we go!
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#5 (permalink) Old 10-31-2008, 12:00 PM
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Thats Great news, glad you found the problem.

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