Click to go to Forum Home Click to go to maXbimmer Home

Go Back   maXbimmer Forums > maXimum Tech > 3 Series > E30 (1983 - 1991)
User Name

Welcome to!

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
Old 09-17-2012, 10:20 PM   #1
2nd Gear Member
Join Date: Apr 2012
Location: Ottawa
Posts: 184
Air filter preferences? Car running rich thoughts?

I've got this European 1986 320i, 6 cylinder M20, L-Jetronic (See Sell or fix 325iS, or franken30? ), it runs amazingly rich. Mapping is not possible on the L-Jetronic. The ECU that got this car running came out of Germany and may be expecting a CAT, something that this car left the factory without being as it was destined for Serbia. So maybe the lack of O2 sensor input has the ECU in some kind of warm-up mode at all times? Idle speed drops as engine temp climbs, temp sensor has good resistance. No intake leaks (would show lean anyway), good grounds, new plugs and distributor/rotor.

I've monkeyed with the idle mixture at the air flow sensor but idle still smells like gasoline and after a good drive the exhaust pipe is carbon black.
I'm starting to be suspicious of the cone shaped R*ct*v* air filter installed by one of the POs, gosh knows how long ago. Could it be choking?
I'd like to change it, even though it has no apparent defects, doesn't seem too dirty. I've got the factory airbox so I could go back to that but the cone filter sure makes a nice moan at WOT.

The cone filter has about the same surface area as the factory flat filter and I don't believe in miracles.

Any ideas? Anybody have opinions about air filters?
SubDad is offline   Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump

All times are GMT -4. The time now is 09:31 PM.

Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Maxbimmer Copyright 2001 - 2018