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29E0 & 29E1 Fault Codes

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ph001
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29E0 & 29E1 Fault Codes

Post by ph001 » Sat Nov 30, 2019 5:09 pm

Unlikely to be lambda sensors then. I’m going with injectors.
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29E0 & 29E1 Fault Codes

Post by R.E92 » Sat Nov 30, 2019 6:33 pm

Belly1987 wrote: Sat Nov 30, 2019 9:09 am I do have some logs but for the life of me have no idea how to transfer them onto here.🙈

Yes it mainly rough isles at cold starts and is hesitant at the lights, in traffic etc.

Hope to see mechanic on Thursday to have a look at vacuum leaks and exhaust etc
https://datazap.me/u/rich/bell87-logs?l ... 9-11-12-13

I uploaded the logs to my datazap account for viewing.

My observations were that the HPFP was OK because the rail pressure kept above 1500 during the flat out pull and injectors were healthy because upon lifting off and going into the overrun phase of the engine operation the lambda reading went full range on both banks without any blips, also both banks kept quite tight together. A blip in the lambda reading in the overrun phase would indicate fuel leaking through closed injectors.

The problem is that during high load operations the short term fuel trims are maxing out and the long term trims are high during cruise conditions. The afr readings are also high which is why the fuel trims are trying to compensate by going positive.

The only other people who've had a similar issue with both banks going lean and having maxed out trims fixed their issue either by solving exhaust leaks or replacing O2 sensors. Since Belly recently had catless downpipes installed my first suggestion was to get everything there rechecked.

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29E0 & 29E1 Fault Codes

Post by Belly1987 » Sat Nov 30, 2019 8:50 pm

Thanks for your input guys! Fingers crossed it is a poor exhaust fixing!!!

Will let you know next week. :) 👍🏻

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29E0 & 29E1 Fault Codes

Post by Belly1987 » Fri Dec 06, 2019 2:10 pm

* UPDATE*

This is what the garage has said to me:

Hi Mark

We have had a look at the car this morning.
I can confirm the 02 sensors are in the correct orientation for the cylinder banks - no problem there.
We have pressure tested the system to higher pressure than the smoke test machine and no obvious problems are shown. There is a slight leak on bank 2 turbo inlet pipe but this is unrelated to the fault you are having.
We have however noticed that bank 1 02 sensor is contacting the steering rack quite badly.
I need to ask- are the downpipes that are currently fitted designed for rhd?
I would like to proceed next by ordering a fitting kit for the downpipes (gaskets) and removing them to adjust the 02 sensor placement for clearance.
I'd like to also replace at least the front 02 sensor as I believe with engine twist the 02 sensor is contacting the steering rack and possibly causing damage/false signals?
Hope this makes sense

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ph001
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29E0 & 29E1 Fault Codes

Post by ph001 » Fri Dec 06, 2019 2:17 pm

Doesn’t tie up with short term fuel trims maxing out under high load conditions to me.
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual - gone but not forgotten.

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29E0 & 29E1 Fault Codes

Post by Belly1987 » Fri Dec 06, 2019 2:22 pm

🤷🏻‍♂️ I guess will have to see if this helps.

If it doesn’t, then god knows!!

It would be nice to actually have a healthy car for once lol

I thought my Mini JCW was bad!

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29E0 & 29E1 Fault Codes

Post by R.E92 » Sun Dec 08, 2019 9:19 pm

If the O2 sensor is touching the steering rack then they have fitted the pipes incorrectly, it's hard to get them fitted without either touching the subframe or having the O2s catching. They would have to have damaged both banks though since both are the same.

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29E0 & 29E1 Fault Codes

Post by Belly1987 » Wed Dec 11, 2019 8:44 pm

Hmmm potentially.

I bought the Downpipes 2nd hand and they might of been off an 35IS

Would this make a difference? Looking at VRSF ones they’re the same downpipes anyways.

He’s going to replace both O2 sensors and move the one touching the steering rack. Weld it up and open it up somewhere more accessible.

From here he’s saying atleast this will give him a definitive answer/ readings.

He’s also replacing the gaskets at the turbo end as there was a small leak

If it’s not the O2 sensors and gaskets then I’m stumped. 😔

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29E0 & 29E1 Fault Codes

Post by R.E92 » Thu Dec 12, 2019 12:15 am

35i and 35is are interchangeable when it comes to parts, it's just an ECU tune that seperates the two. The catless downpipes are the same on both and if he's suggesting he has to move the fittings for the O2 sensors then he's not fitting the pipes correctly. It's not easy but if you don't getting the fitting angle correct and he resorts to moving the insert then it's likely the rest of the pipes will touch the subframe and rattle.

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29E0 & 29E1 Fault Codes

Post by Belly1987 » Fri Dec 27, 2019 6:28 pm

Update

Got the car back with new O2 sensors

Feels a little smoother at lights not surging as much etc. Just checked codes and still mixture codes 🤷🏻‍♂️

He tested all injectors values as well as other things... all within the tolerances!

No idea now. Just going to put MHD map back on and drive it a while as is!

Can’t throw any more money at it for now.

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