Help! Lean codes and idle stalling issues

JP701

Newbie
Joined
Nov 18, 2024
Points
1
Hi All,

I have a U.K. Z3 2001 2.2i M54 engine.

I’ve had for a long time lean codes (both banks) popping up on random occasions for a few years now. Some things were done including, smoke test/CCV change/O2 sensors checked/Fuel pressure check/MAF sensor checked.
Recently been having issues with starting (taking a while to crank) and low idle stalling and jerky throttle control. Occasional throw up of the camshaft sensor fault but I’m getting confused if all this is still caused by the initial lean symptom.
I can send a video of me revving the engine from idle to a little over 1000rpm. Sometimes it will drop to a lower rpm pushing the throttle and sometimes as it falls back to idle it dips below and can stall.
Any info or suggestions hugely appreciated!
 

Ianmc

Zorg Guru (IV)
British Zeds
The M44 Massive
Joined
Oct 12, 2014
Points
165
Location
New Forest
Model of Z
Z3 (M44)
The symptoms you describe, in addition to the camshaft sensor fault, seem to indicate such.
 

t-tony

Zorg Expert (II)
Supporter
British Zeds
#ZedShed
Joined
Dec 31, 2013
Points
226
Location
Torksey Lock,Lincoln, England
Model of Z
E89 Z4 23i Auto
Can I send you a video of the engine running? Is that possible on here..?
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You can't upload video directly to this forum. You need to upload it on YouTube (or similar) then post a link to the YouTube video on here.

Tony.
 

colb

Zorg Guru (V)
British Zeds
Joined
Nov 25, 2012
Points
178
Location
Newport, South Wales,UK
Model of Z
Z3 M43 1.8 (1999) and Z4 E85 2.5 (2003)
Long crank is certainly a symptom of a bad camshaft sensor, as you have already seen a code for this best replace it with an oem sensor do not use cheap pattern parts.
 
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