Looking for some advice.

[PMIKIELL]

Good evening everyone,

I am looking for some help. My car sat for a few weeks while I waited on my new radiator to come in. I completed a cooling system overhaul ( thermostat, water pump, radiator and coolant). During the wait I disconnected the battery so it wouldn't drain down. Upon the first real drive since the work i have noticed that I now am having some misfiring in all 6 cylinders. I ran the codes with my Bluetooth OBD scanner and it found these codes stored. I know I have been having oxygen sensor issues but the car is definitely struggling in power but no smoke at all coming for the exhaust. When I looked those codes up they come up as different issues online. Anyone have any advice? Thanks in advance, also it is a 1998 BMW Z3 roadster 2.8 5 speed manual with 218,500 miles.

 

[NZ00Z3]

Sounds like you have a vacuum leaks. Read: https://www.e46fanatics.com/threads...how-to-diagnose-p0171-p0174-and-more.1284608/

 

[PMIKIELL]

Sounds like you have a vacuum leaks. Read: https://www.e46fanatics.com/threads...how-to-diagnose-p0171-p0174-and-more.1284608/

You are amazing! It sounds like I have a vacuum leak under the intake but haven't tried to dig under it yet.

 

[PMIKIELL]

Just an update. I plan on running a longer smoke test but right now I have not found any vacuum leaks so far. I replaced the O2 sensors, spark plugs, and oil change. Went for a test drive felt great until I hit 5th gear and the car went into a limp mode. The EML light came on and lost almost all power. Limped it home and now I am back to square one troubleshooting. Any advice to start? I even put all the old spark plugs and o2 sensors back in to see if I just got bad items and no change. I saw one person say his cats were clogged which was causing that but I feel like this would cause an additional code. Thanks in advance. I attached pictures of the brand new spark plugs and covered with fuel.

 

[PMIKIELL]

Update to my issue. Finally order the 20 pin adapter and borrow my buddies snap on scanner. I found throttle body codes so I took the intake boot off and manually open the butterfly valve on the throttle body and something fell out. I found part of the maf sensor housing stuck in the throttle body leaving it open. Put everything back together and it back to running correctly. Thanks everyone who helped.