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obd0 vs obd1 vs obd2

Old 12-15-2003, 04:07 PM
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Default obd0 vs obd1 vs obd2

This might have been covered in the past, but I can't find any info on it. What exactly is the difference between the three versions of On Board Diags? I know that if I go back from obd2 I will lose the knock sensor. What else would be different? Would there be any effect on reliability other than the knock sensor? I'm just trying to decide if it is worth getting an obd1, or scarier obd0 (for TE) ecu to chip instead of using the hack.
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Old 12-15-2003, 04:15 PM
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Default Re:obd0 vs obd1 vs obd2

the newer (higher) the obd number the more error codes the ecu can determine.. thats all... more sensors, different sensors.
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Old 12-15-2003, 05:42 PM
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Default Re:obd0 vs obd1 vs obd2

my obd0 has a knock sensor, don't you love japan?
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Old 12-15-2003, 05:42 PM
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Default Re:obd0 vs obd1 vs obd2

Originally Posted by d16tuner
...or scarier obd0 (for TE) ecu to chip instead of using the hack.
Scarier? First off, OBD0 isn't "Scary".. If anything, you're free from *A LOT* of boundries, however, the technology is slightly limited, and these limitations are being overcome by the guys at PGMFI.

I'm the author of TE, and personally, *I* wouldn't use OBD0 unless that is what is your car from the factory. OBD1 is the "prime" generation. Not too many limitations, but also not lacking in technology to gain great engine management.

I love OBD0 to death, and the PGMFI guys have been making *ASTRONOMICAL* strides in OBD0 code, but if you don't have it, don't limit yourself to it. Go to OBD1.
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Old 12-15-2003, 05:46 PM
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Default Re:obd0 vs obd1 vs obd2

It just doesn't make sense that they would update to newer revisions without there being some payoff in reliability or performance. Economy, power, ability of the computer to regulate everything precisely, etc. BTW, I have a 98 Civic EX so I WILL lose the knock sensor, altho I'm not sure how effective it is anyway. Is this the only sensor that going without will cause my reliability to possibly suffer? Also - is changing versions as simple as replacing the ecu and adding an adapter harness, or would other parts on the car need to be replaced with the proper obd version as well (I saw somewhere that perhaps the distributor)?
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Old 12-16-2003, 08:54 AM
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Default Re:obd0 vs obd1 vs obd2

the progression from obd0 --> obd1 --> obd2 was not the manufactures choice. I believe its mostly for diagnosing emmision controls and crap like that. Also helps pin-point the problems more accurately.
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Old 12-16-2003, 11:45 AM
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Default Re:obd0 vs obd1 vs obd2

Originally Posted by d16tuner
It just doesn't make sense that they would update to newer revisions without there being some payoff in reliability or performance.
Reliability, yes, performance, no. Remember, you're driving a production car, not a built race car.

Also - is changing versions as simple as replacing the ecu and adding an adapter harness, or would other parts on the car need to be replaced with the proper obd version as well (I saw somewhere that perhaps the distributor)?
Normally yes, but you're lucky. Your OBDII distributor is basically an OBD1 distributor with a different housing and wiring harness. So you'll be OK. You just need the ECU conversion harness.
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Old 12-16-2003, 02:16 PM
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Default Re:obd0 vs obd1 vs obd2

Thanks for your unbiased view TurboEF9. I would have expected you to say obd0 before anyone, being the author of TE. That kind of stinks tho, since I've been messing with TE and really loving it! So when are you going to make it work with obd1? Seems like I saw somewhere that this was going to happen, but I don't remember if it is imminent or not. Anyway, I guess I need to look more into Ghettodyne, or the other obd1 offerings for now. Keep up the good work man! And that goes for all you techno geeks at PGMFI. You guys are rocking cheap honda performance, at least for people who know.
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Old 12-16-2003, 03:22 PM
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Default Re:obd0 vs obd1 vs obd2

GhettoDyne is also OBD0.
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Old 12-16-2003, 05:41 PM
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Default Re:obd0 vs obd1 vs obd2

go hit up the wiki on pgmfi, it has some obd1 tuners listed.
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