Z3 2.2 Strange faults when in slow moving heavy traffic

Scotty597

Regular Member
Joined
Aug 24, 2023
Points
13
I've had the dakar yellow 2001 Z3 now since May 2023, after doing the sills, parasitc drain and dash lights have finally been using it. Drives like a dream 99% of the time. Strong, steady beat from the 2.2 in most situations. Doesn't like slow moving heavy traffic, gets a misfire every now and again and throws a fault light. Doesn't cough and die just gets a bit rough until.out on the road again and driving. Normal performance resumes. I've cleared the faults twice now and they only come back as soft faults. I've took a pic this time. Crank and cam position sensors were changed 2019. It runs on E5. Pic attached. Any thoughts on a common cause? Only ever in heavy slow traffic, stop and go stuff. The only non standard part it has is a K.and N filter. The latest faults have cleared down again and not came back as I've not been stuck in traffic. 99,000 miles full service history car...im puzzled.....
 

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NZ00Z3

Zorg Guru (IV)
Supporter
New Zealand Zeds
Joined
Dec 9, 2014
Points
158
Location
Timaru, New Zealand
Model of Z
3.0L, 2.8L, 2.0L Z3 Roadsters
All of the fuel trim codes are saying that you have a small vacuum leak somewhere to find.


 

Scotty597

Regular Member
Joined
Aug 24, 2023
Points
13
Small.vacum leak, ouch hoped it would be something much easier to find. VANOS and recirculation stuff were all.done 2020..headache oncoming..
 

Scotty597

Regular Member
Joined
Aug 24, 2023
Points
13
Maybe a coil on the way out? Usually shows on the smooth running values on my code reader.
I thought that initially but it's on all bar 4. Previous codes have had various combinations of cylinders sometimes 2 or more..so I thought that's out.
 
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