My '95 is too stinky (failed emissions) [Archive] - Bimmerfest - BMW Forums

: My '95 is too stinky (failed emissions)

03-18-2008, 06:17 AM
I'm going to put my stock airbox back on and throw in some new plugs. Does anyone else know any tricks that I might be able to benefit from? (aside from the obvious)


03-19-2008, 02:43 PM
Get it up to tempature and spend some time on the highway in 3rd or 4th to help blow out carbon. What was wrong with the #'s? Maybe a new Oxygen Sensor? (At least on a 95 there's only one. I've used "guaranteed to pass" additive before in other cars that seemed to help also.

03-20-2008, 12:33 AM
^ +1

Get your cats HOT HOT HOT.

Put your A/C on high, and drive around on the highway in 4th at ~3.5k-4k RPM. Just don't let the cats cool down. This happened to me.

I pulled right into the dyno and my numbers were low low low.

03-21-2008, 07:21 AM
Agreed, and don't turn off your engine while waiting for the test...

04-09-2008, 09:37 AM
maybe you need some Dinan stuff...

04-09-2008, 09:42 AM
oooops, sorry for the attitude, but...

Actually, my 95 recently failed smog after always passing clean. It was due for Inspection II and when they did that they found a bad Camshaft Sensor and replaced it. So you might check that. They also said like several others that it needs to be hot.

04-11-2008, 09:46 PM
maybe you need some Dinan stuff...

:rofl: I'm a Dinan rep at a dealership.