M30 emissions problem

Moderator: martauto

Post Reply
johnl320
E30 Zone Addict
E30 Zone Addict
Posts: 3125
Joined: Mon Jan 10, 2005 11:00 pm
Location: Hampshire

Sat Apr 23, 2011 12:17 am

My car initially failed its MOT on Co being 4.9% at idle. Thecar does hunt very slightly at idle but i put this down to running a super light M10 flywheel. To get it through MOT I raised the idle to 1000 rpm by adjusting the throttle cable, not ideal I know but needed that ticket.
Raised idle took it down to 3.05% still high but a pass (just). I want to sort this out.
Car has stood for a long time ( as a lot of you are aware ) so i thought a proffesional injector clean would be a good start and maybe a new FPR. Also clean out the idle control valve.
Anyone had any experience of having these injectors cleaned, and the difference its made.
Any other suggestions gratfully received

cheers
john
leeparkes
Married to the E30 Zone
Married to the E30 Zone
Posts: 9538
Joined: Thu Jan 03, 2008 11:00 pm
Location: Black country

Sat Apr 23, 2011 9:11 pm

John, you might be better posting this in tech help, if you post up explain that an M30 is very similar to an M20 (which it is)
Regarding the injectors, imo if an engine has done over 100k and is 20+ years old they aint gonna be too clever anyway :)
Cypriotgeeza wrote:I done both my mates in my old 318is
felt so proud,even tried it with a E30 325i and got put in my place.. :o:
johnl320
E30 Zone Addict
E30 Zone Addict
Posts: 3125
Joined: Mon Jan 10, 2005 11:00 pm
Location: Hampshire

Sat Apr 23, 2011 9:17 pm

leeparkes wrote:John, you might be better posting this in tech help, if you post up explain that an M30 is very similar to an M20 (which it is)


Regarding the injectors, imo if an engine has done over 100k and is 20+ years old they aint gonna be too clever anyway :)
Yeah fair point, I'm getting them done anyway now, just want to avoid the 'put an m52' comments that will no doubt happen by posting in tech help.

Thanks :D
leeparkes
Married to the E30 Zone
Married to the E30 Zone
Posts: 9538
Joined: Thu Jan 03, 2008 11:00 pm
Location: Black country

Sat Apr 23, 2011 9:29 pm

Or post on here in the E34 section :)

http://forum.bmw5.co.uk/index.php
Cypriotgeeza wrote:I done both my mates in my old 318is
felt so proud,even tried it with a E30 325i and got put in my place.. :o:
johnl320
E30 Zone Addict
E30 Zone Addict
Posts: 3125
Joined: Mon Jan 10, 2005 11:00 pm
Location: Hampshire

Sat Apr 23, 2011 9:30 pm

Yeah good idea, didn't even think of posting on there and I'm a bloody member :roll: :o:

Cheers
johnl320
E30 Zone Addict
E30 Zone Addict
Posts: 3125
Joined: Mon Jan 10, 2005 11:00 pm
Location: Hampshire

Tue Feb 26, 2013 10:10 am

Reviving an old thread. Finally got my injectors refurbed and fitted and discovered the rich mixture was down to the screw on the AFM being wound right in, probably to compensate for an air leak on the previous car the engine was fitted to.
What a difference, smoother idle, no rich smell, better hot starting, more power and more economical. Happy days

Next up. New radiator and clutch then its time for paint.
Rav335uk
E30 Zone Meets/Events Team
E30 Zone Meets/Events Team
Posts: 27985
Joined: Wed Jan 19, 2005 11:00 pm
Location: Mad mad mad
Contact:

Fri Mar 01, 2013 9:36 pm

:cool:
Image
If you Got "Haters",Then your doing something Right!
CR24v??? Where's it all gone?? LOL
jimbom30cab
Tech 1 freak
Posts: 7634
Joined: Mon Oct 12, 2009 11:00 pm
Location: in the garage

Sat Mar 02, 2013 7:30 am

Nice one John :D how's the new job going ?

Jim
johnl320
E30 Zone Addict
E30 Zone Addict
Posts: 3125
Joined: Mon Jan 10, 2005 11:00 pm
Location: Hampshire

Sat Mar 02, 2013 1:09 pm

Fooking hard, thanks for asking but the extra cash is coming in handy
Post Reply