B-Line

Good thing I've done this enough to have a work flow...lol.

I don't think I've ever tripped the flags in less than 2 drive cycles. Maybe I'll get lucky tonight. Or maybe it just takes 2x.







There's the Radiohead CD I've been looking for!!!!



Bonus content - a picture I just found in the garage of the 993 at Sebring circa 2001. All the cars on the track were 993's.. lol.

systemsc

Read the Notes at the bottom here; https://www.systemsc.com/codes.htm

B-Line

Thank you. Good notes. I always thought it was a minimum of 2 trips (MY97) but it has taken me 3 in some efforts. I didn't know about the <2500 RPM. I always thought it was <3000rpm.

4Driver4

Getting married
Birth of your first child
Graduating high school. college, etc
Hitting the lottery
Passing emissions in your state for the last time before your car "ages out" of testing

Sometimes it's really hard to pick a favorite....

pirahna

If only California ever had an end date for smog certification.

4Driver4

Brutal.
Connecticut is 25 years. Which is longer than many others. Oddly, a CT car is eligible for antique plates at 20 years.

This spring I took my M Coupe in for its last test.
Service Advisor: OK, so you passed, and your next test is due in two years.
Me: No. It isn't. You will never ever see this car here again.

A good day.

pp000830

Hi B-Line,
I like the way you made process notes on your OBD reader!
I make similar notes on engine components when I service or replace them.
Andy

ahhprods

Is this process because your cel is tripped for sai error? I remember those days well. Thankfully I got mine cleaned out and haven’t had issues since (great is that jinxing myself?!). In VA, after the car hit 25 years, I kissed emissions goodbye!

B-Line

You forgot probably the most important one:

New couch delivery to home day

B-Line

I'm sure someone can explain this better than me... But I'll give it a try.

No. There's no CEL light. But, anytime you change or disconnect the battery on our OBDII's all the emissions flags reset. In order to pass bi-annual emissions your car must handshake with the Star Certification computer. The OBDII on the car won't handshake with a new or recently connected battery unless you reset the omissions flags. Resetting the omissions flags is done by doing the drive process I have sharpied onto the OBDII reader:

Idle for 2'15"
20mph - 30mph for 3'15"
40mph - 60mph for 15'
Idle for 5'
- Do not exceed 3000 rpm
- Do not exceed 60 mph
-- Doing either will negate the entire flag reset and you will have to start over.

B-Line

Thanks Andy, I take that as a huge compliment from our 993 guru!

the wanderer

I remember those days. Ugh. Once I figured out the issues they never came back. Even after disconnecting batteries, yes batteries many times.
Alternatively, can't ya just drive it. Flags will reset unless you are in a big hurry to do your emissions test?
TJ

B-Line

I tried that 20 years ago when I first moved to California. It never worked even after hundreds of miles. Used to go to a referee station who would pass me. Then eventually, the information on how to clear the flags was posted on Rennlist. I followed the procedures and voila! it worked. Been doing it ever since. I'm afraid to check my Carfax report because it probably shows I've had emissions problems. Truth is, the car has always passed emissions with FLYING colors once I learned how to handshake the OBDII to the Star Omissions systems.

in 2002, it wasn't as readily known how to do some of the things we now take for granted is information available here.

akrca4

Thanks for the notes! In the same boat now with renewal coming up in few weeks. Actually tried it last week but forgot no cruise control......

From the notes:
"The exception to this is the '98 993, where only one trip is required over numerous days, and the readiness codes appear as they complete using a generic OBDII scanner."
I remember I was able to reset the code in one try two years ago, didn't know that was for 98 model year only. I guess according to the notes, 98 can reset individual code over multiple drives? I will try it again this weekend and see....

Andy

B-Line

Don't take the "NO CRUISE CONTROL" as gospel. That is something I believe I added to the list. Why? Because the car wants to read on different engine loads like light to medium.
I surmised possibly incorrectly that by using the cruise control, it's only registering one load.
Also, I think when I had problems getting the flags to reset I took out any and all steps that could possibly have effected it. They might have ZERO correlation.

No reverse. No cruise control. I figured, it can't hurt to avoid those things but may have no consequence at all.