smog check after new battery questions...

[SF Final 286]

Got a new battery today bc old battery died. Need smog check now.
Question is: how much do i need to drive the car before computer learns everything so that i can pass the smog test here in CA.
thanks

 

[VIPER GTSR 91]

Would not think a new battery would make any difference but driving 40-50 miles will assure passing.

 

[Martin]

Been there, done that... You probably need to drive for about 40 minutes at highway speeds, and not vary your speed too much. When I went through that, I kept at a costant 60mph for about twenty minutes, took an offramp to head the reverse direction, and did the same. It passed the second time around no problem.

 

[KenH]

I think that you need to go through one or two heat/cool cycles with the car as well.

 

[02ViperTodd]

It took mine 150 miles to recalibrate.

 

[Martin]

It took mine 150 miles to recalibrate.

It goes much faster if you keep the car at a rock-steady speed on the highway - at least for the emissions trouble code reset. Full calibration might take longer since a whole bunch of parameters are dialing in.

 

[ViperGeorge]

The I/M monitor that is the biggest PIA is the Evaporative Emissions test. Fuel tank must be between 15 and 85% full and car can't exceed more than 25 mph for a period of time after cold start up. This is according to the SRT engineers during the last chat session with them. Do a search for that thread and you can read their response. My 06 didn't complete this test even after driving hundreds of miles. Fortunately it is not required (yet) in my state as my car still passed inspection.

 

[Dom426h]

A couple Drive Cycles should do it. A drive cycle starts with a cold start and has a combination of stop/go and steady speed driving. Around 30min should clear most the readiness checks. If you want to get more technical, read the READINESS ISSUES & DRIVE CYCLES sections in this article.
Onboard Diagnstic II (OBD II) HELP

also specifics for
Ford - Ford Motor Company Driving Cycle
GM - General Motors Driving Cycle
couldnt find chrysler...

 

[plumcrazy]

yep, about 150 miles

 

[SquadX]

75 for mine.