Z3 will not start

[colb]

Well that turned out fine in the end, Maf's are troublesome to diagnose they either work or they dont or mis report what they see. You might get away with spraying Maf cleaner on the sensor but in my experience that didn't work for me, it killed mine completly. I fitted a oem replacement at great cost and it transformed the car instantly. I had looked at what the faulty Maf was reporting in live data on my diagnostics, it was performing but obviously not as it should hence the bad running. My symptoms showed up as the car feeling held back when driving it, fuel trims were high as well. The new Maf restored everything instantly.

 

[Jasn]

Sorry to hijack a thread, but is the symptom of a MAF failure the car turning over, nearly starting but not quite catching?

EDIT: I've got the pipe off, and it has the cracks all around the T connection - so I've ordered one of those to start.

EDIT 2: just tried again with the pipe "fixed" using electrical tape, it starts, but isn't running quite, so ordered a MAF now too

Yes, that's what my car was doing — would almost start, but not catch. We replaced the torn pipe, but that didn't fix the issue. We then replaced the MAF and the car is working fine now. You might find just the replacement pipe will fix yours. Good luck.
Jasn

 

[TrevD66]

Glad you have it sorted @Jasn .... hopefully hours of happy driving now

 

[overthehills]

The new Maf restored everything instantly.

I had a new intake boot fitted last week during MOT work. So far so good in that the MIL has cleared and the misfire I occasionally had has gone, but my mechanic advised I may need a new MAF in the not too distant future.

How much should I budget?

 

[Jasn]

I had a new intake boot fitted last week during MOT work. So far so good in that the MIL has cleared and the misfire I occasionally had has gone, but my mechanic advised I may need a new MAF in the not too distant future.

How much should I budget?

Well, mine was about $400, but I expect it could be quite a bit less in the UK.
Jasn

 

[Joss]

I went with ebay £25 for the maf and £18 for the intake, 15 mins to fit both runs a bit nicer now too.

MASS AIR FLOW SENSOR METER MAF FOR BMW 3 (E46), 5 (E39), 7 (E38) SERIES / Z3 E36 | eBay

BRAND NEW MASS AIRFLOW SENSOR.

www.ebay.co.uk

 

[colb]

Yo are so far lucky that the cheap pattern Maf works, I went that way when mine needed replacement, it didn't work when fitted so sent it back and got a refund. Fitted an oem Seimens brand from BMW at great expence and it worked out of the box and transformed the car instantly. Lets see how long your pattern part lasts, if you get trouble again come back and let us know.