Differences between OBD-I and II
Thread Starter
Junior Member
Joined: Dec 2007
Posts: 14
Likes: 0
From: Clinton, MO.
Car: 91 Firebird w/ L03
Engine: LT-1 Swap still in the works
Transmission: 700R4
Axle/Gears: 10 bolt w/ 2.73 (Needs 3.42 w/posi)
Differences between OBD-I and II
I need someone to tell me what the mechanical differences are between OBD-I and II i.e., components, differences of components from donor cars (f-body and b-body). thanx
Thread Starter
Junior Member
Joined: Dec 2007
Posts: 14
Likes: 0
From: Clinton, MO.
Car: 91 Firebird w/ L03
Engine: LT-1 Swap still in the works
Transmission: 700R4
Axle/Gears: 10 bolt w/ 2.73 (Needs 3.42 w/posi)
Re: Differences between OBD-I and II
somebody has to know what i need to know
Joined: May 2004
Posts: 2,262
Likes: 1
From: houston
Car: 83 POS monte carlo 2015 chevy P/U
Engine: 92 5.7 tpi 5.3
Transmission: 700r4 6L60E
Axle/Gears: 2.42 too high
Re: Differences between OBD-I and II
OBD2 monitors a lot more than OBD1 does.
this isn't a complete list.
just off the top of my head, cats, evap system, how long it takes the engine to warm up, any other modules in the car, it controls shifts if it has an auto trans, the A/C clutch. depending on the OBD2 system, it may also control individual ignition coils.
on many vehicles the instrument cluster gets its signals from the PCM for MPH, RPM, temp & other things.
this isn't a complete list.
just off the top of my head, cats, evap system, how long it takes the engine to warm up, any other modules in the car, it controls shifts if it has an auto trans, the A/C clutch. depending on the OBD2 system, it may also control individual ignition coils.
on many vehicles the instrument cluster gets its signals from the PCM for MPH, RPM, temp & other things.
Supreme Member
iTrader: (2)
Joined: Jan 2002
Posts: 9,962
Likes: 5
From: Moorestown, NJ
Car: 88 Camaro SC
Engine: SFI'd 350
Transmission: TKO 500
Axle/Gears: 9-bolt w/ 3.23's
Re: Differences between OBD-I and II
Youd have to convert over to a 96+ PCM + hardware/wire harness from a vehicle with a similar engine to what you currently have.
TGO Supporter
Joined: Nov 1999
Posts: 1,000
Likes: 7
From: Pennsylvania
Re: Differences between OBD-I and II
Yes...
Distributor System: https://www.thirdgen.org/forums/tpi/...-opinions.html
...or...
Distributor-Less System: https://www.thirdgen.org/forums/dfi-...olled-gen.html
Distributor System: https://www.thirdgen.org/forums/tpi/...-opinions.html
...or...
Distributor-Less System: https://www.thirdgen.org/forums/dfi-...olled-gen.html
Thread
Thread Starter
Forum
Replies
Last Post
Numbah-1
Transmissions and Drivetrain
19
Sep 12, 2015 08:57 PM
