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EML 35i

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Ewazix
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EML 35i

Post by Ewazix » Thu Jun 20, 2019 9:29 am

djstan wrote: Wed May 01, 2019 3:23 pm What about a perished rubber hose somewhere? Back a long time ago I had an Audi S3, and forum members at that time were complaining of collapsing pipes which was causing boost problems? Just a thought...
Not a crazy call, I had the same on an MR2 Turbo with boost pipe leak issues. Charge pipe and boost leaks are apparently a known N54 problem.
https://www.n54tech.com/forums/showthread.php?t=13114
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Post by Busterboo » Thu Jun 20, 2019 11:11 pm

OK, so you've changed the plugs. Now, following the thread, you've got to change the coil packs, high pressure fuel pump, turbo boost sensor and boost pipes.

Then take it to a BMW garage, independent or AD.
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Post by R.E92 » Fri Jun 21, 2019 10:29 am

Busterboo wrote: Thu Jun 20, 2019 11:11 pm OK, so you've changed the plugs. Now, following the thread, you've got to change the coil packs, high pressure fuel pump, turbo boost sensor and boost pipes.

Then take it to a BMW garage, independent or AD.
Data logging will tell where the fault is.

It's almost certainly nothing to do with boost pressure. Fuel pump is the most likely cause and can be easily tested using MHD or TestO.

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Post by Busterboo » Mon Jun 24, 2019 2:29 pm

I was being sarcastic, R.E92.

He needs to take it to a garage. :)
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Post by MarshMA10 » Wed Nov 22, 2023 2:09 pm

Was this thread ever solved? I discovered today my e89 35i has a similar symptom to the original post here.

- No issues doing hard driving up to about 5500rpm
- No issues doing lots of higher RPM pulls (but not to redline)
- No cold start issues
- No hot start issues
- No idling issues
- No issues starting the car if it hasn't been driven for 5/10 days.
- Historically has never had an issue doing a full redline pull then changing up a gear i.e. significant rev drop.

- Motorway 2nd gear pull to redline then letting it spin down still in second gear - so revs were high for a long time = EML came on, limp mode activated.
- Coasted to a safe spot, engine idling lumpy, i.e. revving itself from 1000-1500rpm.
- Switched engine off, switched back on again, all fine

- No issues for rest of drive/day.



Car has HPFP replaced and has had injectors done too, but they were probably 5-7 years ago (will check later).
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Post by B21 » Wed Nov 22, 2023 2:34 pm

MarshMA10 wrote: Wed Nov 22, 2023 2:09 pm Was this thread ever solved? I discovered today my e89 35i has a similar symptom to the original post here.

- No issues doing hard driving up to about 5500rpm
- No issues doing lots of higher RPM pulls (but not to redline)
- No cold start issues
- No hot start issues
- No idling issues
- No issues starting the car if it hasn't been driven for 5/10 days.
- Historically has never had an issue doing a full redline pull then changing up a gear i.e. significant rev drop.

- Motorway 2nd gear pull to redline then letting it spin down still in second gear - so revs were high for a long time = EML came on, limp mode activated.
- Coasted to a safe spot, engine idling lumpy, i.e. revving itself from 1000-1500rpm.
- Switched engine off, switched back on again, all fine

- No issues for rest of drive/day.



Car has HPFP replaced and has had injectors done too, but they were probably 5-7 years ago (will check later).
Sounds like an ageing coil breaking down..what does the fault code reader say?

You of course as the owner of a 35i have a decent bmw specific fault code reader?
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard..

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Post by matsmith749 » Fri Nov 24, 2023 12:36 am

Failing HPFP throws codes - decent code reader would be picking that up.

I'm also amazed that a check engine light (even if it disappears) doesn;t show some reason as to why in the code history.

What are you using to scan the car? My mum's poundshop £5 jobbie will not cut it - you need something a little more sophisticated to take the guesswork away.

On a positive note, a decent scanner (circa £100 from Amazon) is cheaper than plugs or coils or HPFP or almost any other guesswork related parts.
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Post by tiglon » Fri Nov 24, 2023 1:57 am

I'll put a fiver on coils.
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Post by MarshMA10 » Fri Nov 24, 2023 5:47 pm

Pertinent service history items:

29/07/2020: 'New cylinder 6 coil pack' - £30
12/02/2020: Full service incl. Spark Plugs - £334
23/06/2017: Water pump - £lots
10/12/2016: All injectors and crank sensor - £lots


Scanners:

I have an OBDII scanner called a GoPoint BT1, which transmits to your phone, and I use an app called DashCommand for curiousness monitoring/basics - but this is probably not a top tier system. Does anyone else use this? I will scan the car with it today and see what it says for fault codes stored/historic.

I have access to a friend's top-flight scanner at Xmas time. He is a transport manager so this is a top of the line industry level scanner.

I have had the car scanned by another friend's £1000 handheld mechanic-style OBDII scanner job. No fault codes were present then.

I'm open to the idea of buying a better scanner if it's worthwhile.
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Post by B21 » Fri Nov 24, 2023 6:37 pm

MarshMA10 wrote: Fri Nov 24, 2023 5:47 pm Pertinent service history items:

29/07/2020: 'New cylinder 6 coil pack' - £30
12/02/2020: Full service incl. Spark Plugs - £334
23/06/2017: Water pump - £lots
10/12/2016: All injectors and crank sensor - £lots


Scanners:

I have an OBDII scanner called a GoPoint BT1, which transmits to your phone, and I use an app called DashCommand for curiousness monitoring/basics - but this is probably not a top tier system. Does anyone else use this? I will scan the car with it today and see what it says for fault codes stored/historic.

I have access to a friend's top-flight scanner at Xmas time. He is a transport manager so this is a top of the line industry level scanner.

I have had the car scanned by another friend's £1000 handheld mechanic-style OBDII scanner job. No fault codes were present then.

I'm open to the idea of buying a better scanner if it's worthwhile.
My bet is on the other coil packs 1-5..when one coil goes the rest follow shortly.. :tumbleweed: :thumbsup:
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard..

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Post by tiglon » Fri Nov 24, 2023 7:05 pm

B21 wrote: Fri Nov 24, 2023 6:37 pm
MarshMA10 wrote: Fri Nov 24, 2023 5:47 pm Pertinent service history items:

29/07/2020: 'New cylinder 6 coil pack' - £30
12/02/2020: Full service incl. Spark Plugs - £334
23/06/2017: Water pump - £lots
10/12/2016: All injectors and crank sensor - £lots


Scanners:

I have an OBDII scanner called a GoPoint BT1, which transmits to your phone, and I use an app called DashCommand for curiousness monitoring/basics - but this is probably not a top tier system. Does anyone else use this? I will scan the car with it today and see what it says for fault codes stored/historic.

I have access to a friend's top-flight scanner at Xmas time. He is a transport manager so this is a top of the line industry level scanner.

I have had the car scanned by another friend's £1000 handheld mechanic-style OBDII scanner job. No fault codes were present then.

I'm open to the idea of buying a better scanner if it's worthwhile.
My bet is on the other coil packs 1-5..when one coil goes the rest follow shortly.. :tumbleweed: :thumbsup:
100%.

Symptoms are exactly the same as when my coil pack went on cylinder 3... and exactly the same as when the coil pack on cylinder 2 went 6 months later.

If it's not a coil pack, I will eat my spare coil pack.

Disclaimer: I won't actually eat the coil pack.
2014 E89 35is Valencia Orange 788M wheels (M2 Competition), E90 M3 control arms, Eibach Pro Kit Springs, MHD Stage 1

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Post by MarshMA10 » Sun Nov 26, 2023 8:21 pm

Nice. They’re super easy to switch out at least.

Fairly tempted to buy 6 and do them all? No harm in fresh ignition after 14 years…
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Post by B21 » Mon Nov 27, 2023 10:10 am

MarshMA10 wrote: Sun Nov 26, 2023 8:21 pm Nice. They’re super easy to switch out at least.

Fairly tempted to buy 6 and do them all? No harm in fresh ignition after 14 years…
Should be regarded as a replacement item like spark plugs …
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard..

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Post by MarshMA10 » Mon Nov 27, 2023 10:19 am

Would anyone be willing to recommend an online supplier? :)

Will go to BMW local as well but always good to have a benchmark.
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Post by B21 » Mon Nov 27, 2023 5:31 pm

MarshMA10 wrote: Mon Nov 27, 2023 10:19 am Would anyone be willing to recommend an online supplier? :)

Will go to BMW local as well but always good to have a benchmark.
Autodoc is the go to place if you are not in a rush..

Their app gives always the highest discounts which vary between 22% and last Fridays high of 49%

Eldor, NGK, Bosch are the brands I’d prefer for this part…
We choose to go to on with this endeavour at this time and do the other things, not because they are easy, but because they are hard..

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