Z4M misfire at 3500rpm

TomK · Post by **TomK** » Mon Jun 11, 2018 1:09 pm

If you haven't plugged it in and need to make sure you'll clear your problem I would also be buying a tps given the fault code you pulled. There's 2 on the engine and they're exactly the same, so 1 will be fine as it would be unlikely for both to go.

samZ4M · Post by **samZ4M** » Mon Jun 11, 2018 1:47 pm

13637840383? shows 1 in the diagram. £25 for genuine on eGay.

http://www.realoem.com/bmw/enUS/showpar ... 3637840383
http://www.realoem.com/bmw/enUS/showpar ... 3637840383

ETA: sorry, you're right, there are 2! Added link. will get 1 ordered.

AndyBeech · Post by **AndyBeech** » Mon Jun 11, 2018 5:51 pm

samZ4M wrote: ↑Mon Jun 11, 2018 1:47 pm 13637840383? shows 1 in the diagram. £25 for genuine on eGay.

http://www.realoem.com/bmw/enUS/showpar ... 3637840383
http://www.realoem.com/bmw/enUS/showpar ... 3637840383

ETA: sorry, you're right, there are 2! Added link. will get 1 ordered.

Sure that’s genuine? Seems a touch cheap, usually around £60. Might be ok but a lot of stuff is passed off as genuine on eBay....

samZ4M · Post by **samZ4M** » Mon Jun 11, 2018 6:11 pm

yea, not so sure myself. They are readily available next day from BMW for £80. I am going to get DIS tonight, see what it says. If it's a cam sensor, replace. If it's TPS, I will order one tomorrow and fit it wed. Or just fit the bloody lot and hope it works!

AndyBeech · Post by **AndyBeech** » Mon Jun 11, 2018 6:27 pm

Let us know what DIS says, useful for future reference!

samZ4M · Post by **samZ4M** » Mon Jun 11, 2018 8:41 pm

Results of INPA

: DA8E2A5B-8C49-4050-A78E-3EF8E4718551.jpeg (207.24 KiB) Viewed 1067 times

AndyBeech · Post by **AndyBeech** » Mon Jun 11, 2018 9:19 pm

samZ4M wrote: ↑Mon Jun 11, 2018 8:41 pm DA8E2A5B-8C49-4050-A78E-3EF8E4718551.jpeg

Results of INPA

Looks just about ok, I believe DIS gives a tolerance of - / + 5 on the nominal values given to the actual values of your car so maybe a bit off target but to be expected if you’ve never had a vanos refresh

samZ4M · Post by **samZ4M** » Mon Jun 11, 2018 9:20 pm

2nd run. Some big differences...

: 57341D02-F2CE-43CD-B6F0-D8F184D419E3.jpeg (222.27 KiB) Viewed 1070 times

AndyBeech · Post by **AndyBeech** » Mon Jun 11, 2018 9:55 pm

What's the big differences? Looks fine to me?
Though I would suggest the DIS test is better but that still seems ok to me

samZ4M · Post by **samZ4M** » Mon Jun 11, 2018 10:00 pm

Main one is this...

: 57341D02-F2CE-43CD-B6F0-D8F184D419E3.jpeg (215.15 KiB) Viewed 1069 times

AndyBeech · Post by **AndyBeech** » Mon Jun 11, 2018 10:06 pm

Ah I see, missed that one. Strange, but DIS gives a target value of less than 500 milliseconds for both of those results.

Advance adjustment (or 'early' on yours) should be around 194ms
Retard adjustment ('late') should be around 294ms

Maybe just an anomaly? Run it a few more times making sure engine is fully warmed up, and try on DIS if you've got it. I guess that could indicate a fault but I wouldn't read too much into yet. No other error codes? Doesn't seem right it would be exactly the same adjustment time as the inlet, I've known INPA to not be wholly accurate at times.

samZ4M · Post by **samZ4M** » Tue Jun 12, 2018 8:29 am

we done 3 in the end, all numbers stayed the same (give or take) but the one circled and one below read:

1:
195
195

2:
295
295

3:
195
295

If those figures fall within the tolerance, I reckon it's the TPS then, given the errors below. Once cleared it didn't report again, until I drove it. Then I only got 2D07. I'm going to order 2 TPS', as the error below looks like it's both. Replace one, see how it goes...

: IMG_3546.jpg (164.74 KiB) Viewed 1052 times

samZ4M · Post by **samZ4M** » Tue Jun 12, 2018 8:37 am

I also had this, when I first started yesterday, let it run for 3 minutes, turned off and back on and they went away...

: DC9CB56E-CB5C-40E2-AA66-C00271CC1EA7.JPG (114.09 KiB) Viewed 1051 times

ph001 · Post by **ph001** » Tue Jun 12, 2018 10:57 am

Hmmm, I wouldn't expect a 2D07 fault to be cam position sensor tbh - could be, just wouldn't be top of my list. More likely the throttle position sensor (there are two of them though, one is easy to get to; the other requires the intake to come off to access). Otherwise, the throttle actuator itself, but that's an expensive part so would be the last thing to replace if a 2D07 (and related) codes are the only ones you are getting.

I would also add though that those symptoms are exactly the sort of thing you get with a bad coil pack or plug - just doesn't tie in with the error codes. Unless the two are not related of course.

samZ4M · Post by **samZ4M** » Tue Jun 12, 2018 10:57 am

Not sure if you're reading it 100%. I have ordered 2x TPS as a precaution, I will swap 1 at a time as my first change. The Vanos was mentioned here (or else where, I've read so much!) so thought it worth checking. It seems fine.

So TPS, or coil pack/plugs. I will get the TPS' tomorrow, and play with them. Sparks/coils are available at my local ECP, so will venture to that if the TPS' don't help.

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