Problems after O2 install...need help
 

replaced all 4 O2 sensors on 1999 boxster....car now runs very rough, pops, misfires, no power, stalls...tried unhooking battery as I have done before so ECU would reset to factory baseline and re-learn correct fuel mixture parameters with new sensors....no luck yet...am I missing something...any helpful suggestions would be greatly appreciated.....Car is not yet throwing any new codes...I reset CEL with scanner before starting... after sensor install...

Hi again...you might want to delete this one since you have posted the same thing twice. :cheers:

I posted a response on the other one.

Also, try to be patient....others will respond. ;)