Is SD emissions friendly
12-02-2006, 09:51 PM
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Is SD emissions friendly i know its a vague question but heard that if you go SD then you cant set the flags you need to pass emissions. since they dont snif hte ride just scan it for all the flags set, is it possible to go SD and set all the flags needed
12-02-2006, 10:06 PM
#2
From my understanding (and been running SD for nearly two years now full time), you have no choice but to set a MAF code to fall in to SD mode (even with a custom operating system). SES code = automatic fail, especially for an emissions related device like a MAF sensor.
12-03-2006, 08:09 AM
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Originally Posted by RedHardSupra
yea but if you set the MAF to not throw a code, then it should be clean, right? what about the readiness codes--do they get set proper with MAF failed?
12-03-2006, 09:09 AM
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see the problem with a MAF i have if i dont go the 100mm maf is my air intake will be
2 3" tubes that will mate into a single 4" then goes into the 90mm tb. if you meassure the outside of hte 90mm youll see its a 4" i want as much flow as possible. theory behind this is most run this TB on a stock air inlet tubing and its actually only 3.5 so if i can provide it with a solid 4" diameter it wont have the bottle neck effect. so its either SD or 100mm MAF
2 3" tubes that will mate into a single 4" then goes into the 90mm tb. if you meassure the outside of hte 90mm youll see its a 4" i want as much flow as possible. theory behind this is most run this TB on a stock air inlet tubing and its actually only 3.5 so if i can provide it with a solid 4" diameter it wont have the bottle neck effect. so its either SD or 100mm MAF
12-03-2006, 04:06 PM
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Holden (GM-H australia) had a special version of the LS1 commodore (VT-VX HSV GTS) that had SD tune from the factory. Even thoes computers always stored PO101 PO100 (IIRC) for the life of the PCM, though MIL was turned off for thoes codes. As you would with a SD tune anyway.
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12-03-2006, 04:46 PM
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yes but thats in Aussie land, i just want to know if my work will be worth well. one way saves me 300 bucks other way costs me 300. i just dont want to not be able to get inspected cause of not setting all my flags
12-03-2006, 05:33 PM
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From my understanding, talking to inspectors and tuners, if your SES light isnt on, then it shouldnt show anything on their computer (at least in Texas). Either way, you are probably going to a "friendly" inspection place since you probably dont have all your emissions stuff and wont pass the visual. It isnt all that much harder (if you have a friend doing it) to have them just hook up another OBD2 car and not even worry about it.
12-03-2006, 05:40 PM
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trust me i went thru this with a bullshit tune from PCM4Less he shut off the SES light but screwed up the PCM so it never set itself. always stayed open and never set any flags. i never got a light but threw codes like Big Ben throws interceptions
12-03-2006, 05:43 PM
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I passed the OBD part of smog with my car running SD. I had completely forgot about it until after I got home and realized that I just passed on an SD tune. As long as your PCM has the MAF erased with no coeds you should be OK
12-03-2006, 05:58 PM
#15
Hmmmmmmmm...interesting. I'm gonna have to mess around with this when I get some time and see what I can come up with. I don't ever set any lights, but I do set the MAF fail codes to get in to SD. Maybe they aren't needed...who knows. I'll find out so that I know.
12-03-2006, 06:08 PM
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Just reset the maf fail frequency to above the readable band. I don't get any codes and I am in SD open loop. I don't know if it's different but you shouldn't have any codes popping when you scan it.
Nate
Nate
12-03-2006, 06:27 PM
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Sorry I don't have any tips I can give you on how this is done. My tuner is Rick from Synergy motorsports. He's a sponser here Rick@synergy, he's be the man to talk to. I'll I can tell you is that it CAN be done.
12-03-2006, 09:28 PM
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Originally Posted by Quik
yes but thats in Aussie land, i just want to know if my work will be worth well. one way saves me 300 bucks other way costs me 300. i just dont want to not be able to get inspected cause of not setting all my flags
Sure you can turn off MIL for PO100 etc. but it will still show up in stored codes.
12-03-2006, 11:27 PM
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Originally Posted by Fraser@speedinc
I don't think you understand, not even engineers at GM were able to make it where no codes are stored with an SD tune using an LS1 computer.
Sure you can turn off MIL for PO100 etc. but it will still show up in stored codes.
Sure you can turn off MIL for PO100 etc. but it will still show up in stored codes.
Well then how come I show no error codes for a SD open loop tune?