94 530i loss of power [Archive] - Bimmerfest - BMW Forums

: 94 530i loss of power

09-27-2008, 05:54 PM
Hello all. My 94 530i will not go past 20mph. It happend sudenly I was going 60 then 20. I replaced the fuel filters. I put on a new mass air sensor no help. If I unplug the mass air sensor it runs rough but I can go 55mph. The stomp test code reads I need to replace oxogen sensor #1. Could this be it? Or is it somthing upsteam throughing that alarm.

09-27-2008, 06:04 PM
take it to the mechanic

09-27-2008, 06:33 PM
Thats no fun.

bimmer dot info
09-29-2008, 10:39 AM
What is it doing when you get to 20? Any distinct symptoms?

10-07-2008, 06:34 AM
It bogs down, even at an idol if you push on the gas it bogs down, like its starving for somthing.

bimmer dot info
10-07-2008, 08:48 AM
Check the ignition. At least do plugs. If that makes it better but does not fix it move to the coil boots and coils. Couldnt hurt to do the O2 sensor either.

10-07-2008, 07:35 PM
does the exhaust free flowing if not your catalytic converter may be plugged up......