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Old 01-10-2009, 03:16 PM   #1
DJCannon5
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1995 SC1
2007 ION-1 Sedan
Default 1995 Good year or Bad year for S Series

Is 1995 a bad year for S Series. my logic being it has emissions and still uses OBDI. Seems like it falls at a turning point for the S. Would be nice to have an S Series with no emissions and OBDII.

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Old 01-10-2009, 03:47 PM   #2
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1994 SL2
1999 SL
Default Re: 1995 Good year or Bad year for S Series

The 1995 is a mix of both worlds....the 95 model year is the 1st gen exterior and the 2nd interior. 95 Model year also went to MPFI (Multi Port Fuel Injection), which hadn't previous been around. 95 model year also moves from vaccuum powered EGR to Electronic EGR valve operated by servo motors.

These are the main things I can think of off the top of my head.

If you are looking for OBD II engine, I would go for 96 model year, but that is the year that the 96 model year went to the 2nd gen exterior as well.

Really is your call

...
Bryan

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99 SL

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97SW2 266K Miles
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Gone 3/12

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Old 01-10-2009, 04:55 PM   #3
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2007 AURA XR
Default Re: 1995 Good year or Bad year for S Series

im sure this is a dumb question but why would you care if its ob1 or ob2?

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Old 01-10-2009, 04:59 PM   #4
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Default Re: 1995 Good year or Bad year for S Series

Quote:
Originally Posted by DJCannon5 View Post
.... Would be nice to have an S Series with no emissions and OBDII.
Not sure what you mean as every USA car since the '70's uses one form or another of emissions controls with continuous improvements along the way to what we have now; before and after O2 sensors on each end of the catcon with closed loop engine management running emissions controls while still allowing Corvette muscle car power. There isn't a car that's imported that doesn't have emissions controls unless it was brought in illegally. Every OBD II car runs the latest emissions controls.

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Old 01-10-2009, 05:15 PM   #5
DJCannon5
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1995 SC1
2007 ION-1 Sedan
Default Re: 1995 Good year or Bad year for S Series

Someone outside the forum must have thrown me off. They told me the 93s ran faster because of slacker emissions standards.

As for OBDI I was told its harder to find tuners for it and they are not as good.

I am trying to find out info outside of forums on how people tune with the OBDI's I heard that the parameters are so open its pointless. If i am misinformed or not understanding whats going please feel free to correct any wrong ideas I have.

If OBDI is as good as OBDII and the emissions on a 1995 arent a hp killer Id love to hear that since I already went and bought another 1995 S Series.

...
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"1995 SC1 Manual" White
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Old 01-12-2009, 10:20 AM   #6
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1995 SL2
Default Re: 1995 Good year or Bad year for S Series

MY '95 has performed well overall, with no unusual issues or problems.

OBDII provides more potentially useful diagnostic information than OBDI.

If deciding whether or not to get the car, I suggest you let other factors related to the condition of the car drive weigh more heavily in your decision than just the model year.

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Old 01-12-2009, 12:58 PM   #7
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2001 SC2
Default Re: 1995 Good year or Bad year for S Series

Quote:
Originally Posted by 2NDSOUT View Post
95 Model year also went to MPFI (Multi Port Fuel Injection), which hadn't previous been around. 95 model year also moves from vaccuum powered EGR to Electronic EGR valve operated by servo motors.
This only applies to SOHC engines. DOHC's were always MPFI. And 1994 California emissions DOHC's had the electronic EGR valve too.

Quote:
Originally Posted by 2NDSOUT View Post
If you are looking for OBD II engine, I would go for 96 model year, but that is the year that the 96 model year went to the 2nd gen exterior as well.
There is no such thing as an OBDI or OBDII engine. OBD is in the programming in the PCM. The engine doesnt care what PCM is controlling it. 1993-2002 engines are cross swappable. There wil run perfectly and pass emissions. There is very little difference between 1993-2002 engines. And the only difference in the 91/92 years is a slightly different crank.

...
Mike

-1991 Turbo SL2.
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www.differentracing.com

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Old 01-12-2009, 01:01 PM   #8
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2001 SC2
Default Re: 1995 Good year or Bad year for S Series

Quote:
Originally Posted by DJCannon5 View Post
Someone outside the forum must have thrown me off. They told me the 93s ran faster because of slacker emissions standards.
Untrue

Quote:
Originally Posted by DJCannon5 View Post
As for OBDI I was told its harder to find tuners for it and they are not as good.
Untrue

Quote:
Originally Posted by DJCannon5 View Post
I am trying to find out info outside of forums on how people tune with the OBDI's I heard that the parameters are so open its pointless. If i am misinformed or not understanding whats going please feel free to correct any wrong ideas I have.
You can do the same stuff on a OBDII controlled S-Series as you can on an OBDI.

Quote:
Originally Posted by DJCannon5 View Post
If OBDI is as good as OBDII and the emissions on a 1995 arent a hp killer Id love to hear that since I already went and bought another 1995 S Series.
If you're getting a DOHC, HP was the same every year they were produced.

...
Mike

-1991 Turbo SL2.
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www.differentracing.com

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Old 01-12-2009, 01:02 PM   #9
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1994 SL2
1999 SL
Default Re: 1995 Good year or Bad year for S Series

Quote:
Originally Posted by Low Saturn View Post
This only applies to SOHC engines. DOHC's were always MPFI. And 1994 California emissions DOHC's had the electronic EGR valve too.



There is no such thing as an OBDI or OBDII engine. OBD is in the programming in the PCM. The engine doesnt care what PCM is controlling it. 1993-2002 engines are cross swappable. There wil run perfectly and pass emissions. There is very little difference between 1993-2002 engines. And the only difference in the 91/92 years is a slightly different crank.
I meant to say that the 95 was OBD II PCM...not sure why I threw the Engine thing in there.

Sometimes I get carried away when I respond....

My 94 SL2 has a vacuum powered EGR valve (I'm in Ohio). I guess that is ONLY for 94California cars, that they have the electronic EGR valve?

...
Bryan

94SL2 HCE, "Pearl"

99 SL

94SL2 260K Miles
1/15

97SW2 266K Miles
2/15

Always
94SC1 340,501 Miles
Org. Engine/Auto Trans
2/97-10/08
Gone 3/12

92SL1
05VUE
91SC

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Old 01-12-2009, 01:08 PM   #10
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2001 SC2
Default Re: 1995 Good year or Bad year for S Series

Quote:
Originally Posted by 2NDSOUT View Post
I meant to say that the 95 was OBD II PCM...not sure why I threw the Engine thing in there.
1995 is OBDI

Quote:
Originally Posted by 2NDSOUT View Post
Sometimes I get carried away when I respond....
We all do it from time to time.

Quote:
Originally Posted by 2NDSOUT View Post
I guess that is ONLY for 94California cars, that they have the electronic EGR valve?
Yep, California emissions DOHC have the electronc EGR valve. Thats how I get all those EGR adaptor plates I sell.

...
Mike

-1991 Turbo SL2.
11.809 @ 116.488 mph
www.differentracing.com

-2001 Limited Edition SC2 (#78)
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-2007 Saturn Aura XR
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Old 01-13-2009, 03:30 AM   #11
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1993 SL2
Default Re: 1995 Good year or Bad year for S Series

I know Gm was playing around with obd2 in some 94 and 95 vehicles but I think they were mostly S-10s (or at least some were as I went to school with someone who had a 95 S-10 with obd2) but they have a different connector then the universal connectors all cars have now so an adapter is needed for those selected vehicles as I think they have a different pin order and plug

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Old 01-13-2009, 11:05 PM   #12
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Default Re: 1995 Good year or Bad year for S Series

My 94 SL2 has a vacuum powered EGR valve (I'm in Ohio). I guess that is ONLY for 94California cars, that they have the electronic EGR valve?[/QUOTE]


I have 94 SL2 that has electronic EGR valve as of California emissions I bought in 1993 (November that time) in NY state ! Those DOHC 94 SL's with electronic EGR sells In California, NY and Mass. Not sure in other states as well.

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