Drive Cycles driving me nuts!

[Don Plumley]

One of the clear downsides of OBDII cars is the Drive Cycle. After replacing my O2 sensors and clearing the MIL/CEL (and disconnecting the battery to remove the airbag), I have no DTC's. But I can't smog the car until the readiness indicator says "go".

My AutoEnginuity OBDII tool (great product) and my friendly Smog station both confirm after 200 miles of trying to hold constant speed, idle, meditate, decelerate without touching the brake/clutch, etc., etc., etc - the non-continuously monitored systems are still "not complete".

What a total PITA. Searching the Rennlist archives, talking to garages, etc., ways to complete the drive cycle remain folk legend. There's no clear number of cold starts after battery removal, process, etc.

Just venting....

[Bill Verburg]

like I said, this is why I only looked at OBD1 993s

I think that Steve Weiner posted the drive cycle necessary for resetting the readiness codes, don't remember which forum or thread though

[Don Plumley]

Yes, but there are advantages to the OBDII diagnostic data. The rennlisters suggested that I contact the smog referee here in Cali. Very cool - appointment on Monday morning.

I saw Loren's comments about the drive cycle here: www.systemsc.com/codes.htm

Apparently Porsche has published the drive cycle on their tech web site, but I was unable to find it. Anyway, it looks like there is a good alternative to the madding process - it's like shooting at targets in a dark room. Later, you are told you hit one, you just don't know with which shot.