Just bought my first bmw, 2006 bmw 750i. The previous owner told me it needs cats and 02 sensors that's it. Plugs,coil packs been changed. I took it for a test drive, under load no power at all. Flat surface I step hard on the has no power at all dies on its face. I checked the codes, the 2 rear 02 sensors were on there and misfire in cylinder 1. Brand new plug and brand new coil on all 8. Could the gutted cats do this? I had cars before with gutted cats and they ran ok even with 02 sensors going out. Thank you and advice is greatly appreciated
Are you sure the cats are gutted,
and not actually clogged?
- - - Updated - - -
A diagnostic scan would be recommended.
Cats are gutted
Clear codes and perform new scan,
but I suspect fuel delivery issues.
Install a FPG at fuel rail,
with a hose long enough for the gauge to be taped,
and viewable from the windshield.
This way you are able to view and record values while symptoms occur.
I performed scan, no new codes. But still acts up same way. I started and it acted up on start up, cleared up but when under heavy acceleration falls on face
Bookmarks