OBD I?? OBD II?? WTF???
Thread Starter
Instructor
Joined: Dec 2000
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From: SoCal
OBD I?? OBD II?? WTF???
A buddy of mine purchased an 1995 Vette off ebay almost a year ago. He recently had the engine rebuilt by Nu-Tek, he now has an all forged 396.
We noticed a few wierd things. When we dropped the exhaust to pull the motor it had four O2 sensors. I also noticed that it has an OBD II (96+) plug under the dash.
Could this car really be a 1996? Is the VIN # anywhere else besides the base of the windshield? Does anyone else have a 1995 with a 96+ diagnostic port? Should a 1995 have four O2 sensors?
Thanks for any help, we are scratching our heads on this one. Gotta know if it's OBD I or II before starting to tune it.
:confused: :confused: :confused:
We noticed a few wierd things. When we dropped the exhaust to pull the motor it had four O2 sensors. I also noticed that it has an OBD II (96+) plug under the dash.
Could this car really be a 1996? Is the VIN # anywhere else besides the base of the windshield? Does anyone else have a 1995 with a 96+ diagnostic port? Should a 1995 have four O2 sensors?
Thanks for any help, we are scratching our heads on this one. Gotta know if it's OBD I or II before starting to tune it.
:confused: :confused: :confused:
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: OBD I?? OBD II?? WTF??? (4DRSS)
this gets odd... but, as I understand it, 1995 was a transitional year... there are a lot of OBDII stuff, but it's still an OBDI system.
A good friend of mine is a tech at the local Dodge dealer, and many of the Dodges in 1995 are a bastard thing... call it OBDI.5?
I would be interested to hear more on this subject...
A good friend of mine is a tech at the local Dodge dealer, and many of the Dodges in 1995 are a bastard thing... call it OBDI.5?
I would be interested to hear more on this subject...
Melting Slicks
Joined: Jun 2002
Posts: 2,168
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From: Phoenix AZ
Re: OBD I?? OBD II?? WTF??? (4DRSS)
I believe that '94 and up are OBDII. Things like speedo changes are done through programming changes rather than speedo gears on the '94 and up cars because of this difference. I think I read somewhere that the Corvette was the "guinea pig" for OBDII testing before other models such as the GM trucks, which like you said are '96 and up. There have been a number of discussions about which years are the best to mod, as OBDII cars are a bigger challenge to tune.
[Modified by vetracer, 4:53 PM 9/18/2003]
[Modified by vetracer, 4:53 PM 9/18/2003]
Burning Brakes
Joined: Oct 2002
Posts: 1,152
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From: Wichita KS
Re: OBD I?? OBD II?? WTF??? (4DRSS)
I believe they began installing the OBD-2 diagnostic plug in 1994; the 1995 models all had three o2 sensors, one on the left & two on the right side. I've never heard of a 95' with four o2 sensors.
BTW, the overall operating system is still OBD-1 based
[Modified by superlund, 5:52 PM 9/18/2003]
BTW, the overall operating system is still OBD-1 based
[Modified by superlund, 5:52 PM 9/18/2003]
Team Owner
Joined: Sep 2001
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From: Athens AL
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Re: OBD I?? OBD II?? WTF??? (4DRSS)
Its OBDI, they just put all the OBDII stuff on there. I guess in case the Govt required them to do it early, they knew OBDII was coming.
Most of the extra stuff are just dummy components. Like the extra O2 sensors.
Most of the extra stuff are just dummy components. Like the extra O2 sensors.
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Re: OBD I?? OBD II?? WTF??? (superlund)
I believe they began installing the OBD-2 diagnostic plug in 1994; the 1995 models all had three o2 sensors, one on the left & two on the right side. I've never heard of a 95' with four o2 sensors.
BTW, the overall operating system is still OBD-1 based
[Modified by superlund, 5:52 PM 9/18/2003]
BTW, the overall operating system is still OBD-1 based
[Modified by superlund, 5:52 PM 9/18/2003]
