Is my MK2 VR6 an OBD1 or OBD2??

[Nerih 0]

mine has fully carpetted boot, and plastic on the covers, if u want a pic i'll send it. mine is a bit of a hodge podge.

[binliner 0]

lol I dont want a pic!... yeah I think some of the crossover ones follow no rules at all

[Adamski FRST 0]

rare but not necessarily more desirable!

the 2 N plate highlines Ive seen didnt have a fully carpeted boot they had the rubber/plastic type wheel arch covers and no plastic protection on the bit where the boot catch is.

i have full carpet and the covers on mine so guess i must be lucky....

[VR6Pete 1,455]

It looks like an OBD1 to me.

AFAIK, all OBD2's had electronic throttle bodies.

[BoostedOne 0]

it lookks like obd2 to me no isv

See the hose coming off the back of the intake tube and the muffler can looking thing to the right of the throttle body? If it has no ISV' date=' then where does this go? On my OBDI engine, those go to the ISV that are under the plastics.

The best way of telling is to look at the throttle body from the driver's side. If it has a large black sensor on it, it's OBD2. (taken from this forum, and it doesn look like its got a big sensor on it)

Yeah, that looks exactly like my 93 OBDI TB and TPS sensor.

Like someone else said, jack up the car and if you have an O2 sensor before the cat AND after the cat, its OBDII. If you only have one before the cat, its OBDI.

The OBD 1 engine has far less emmisions controls and therefore is less restricted' date=' but the reason it is said to be a more powerful and preferable engine to an OBD 2 is mainly due to it's construction. The OBD 1 engines were built a little better with forged crankshafts, heavier duty valve springs and retainers, and other such subtle, but effective changes

(vwvortex forums)

the main differenced between OBD1 and OBD 2 are emmisions controls.

The OBD 2 engine has addition control devices (post-cat o2 sensor, charcoal canister, etc.) that technically make it slower due to more restrictions on emmisions. However, it should have better throttle response than OBD 1 due to updates in the software and TB/intake manifold changes.

The OBD 1 engine is also easier to mod due to less emmisions and ECU software restrictions (i.e. less CELs from modding) and should produce slightly more power stock

[/quote']

I see that said alot of the time, and the OBDI vs OBDII debate is almost as big as carbs vs. fuel injection 10 years ago. I dont have any experience modding OBDII VWs, but what I will say is if you have a chip tuner that knows what they are doing, its better. OBDII is a much more advanced, smarter system than OBDI could ever hope to be. If those capabilities are harnessed, you have a very powerful system at hand. While there is extra emissions stuff like a full EVAP system with LDPs and so forth(atleast on the 2.0), an extra O2 sensor, blah blah blah, that stuff isnt inherently going to make less power. Its not like the 70s in the US when they tacked on all sorts of junk that made the cars run worse!

But, like I said, the OBDII systems are awesome, really, as long as they are figured out. With my limited experience on US model Fords, with a half decent interface you can datalog ANYTHING in relation to that engine. You can see EXACTLY what is going on. Not just input and ouputs, but the internal ECU strategy that it uses to make its decisions. And anything you can see can be changed. For instance, my Ford still uses EGR with its OBDII system, and I can burn the chip in the ECU to totally shut off EGR. I can tell it to disable the rear O2 sensors so I can delete the cat and not get a CEL. I would assume that although the hardware is not commonly available to average enthusiast yet, that the VW tuner places would have similar capability.

For those that gave me a hard time in the other thread, see, this is how you state what you want to say, even if you dont have direct experience.

[binliner 0]

The best way of telling is to look at the throttle body from the driver's side. If it has a large black sensor on it' date=' it's OBD2. (taken from this forum, and it doesn look like its got a big sensor on it)

[/quote']

Yeah, that looks exactly like my 93 OBDI TB and TPS sensor.

Like someone else said, jack up the car and if you have an O2 sensor before the cat AND after the cat, its OBDII. If you only have one before the cat, its OBDI.

or an easier way is to count the wires on the wiring connector to the throttle body... obd1 has 3 obd2 has about 8

[Adamski FRST 0]

to be honest its not a game of wats better than the other we were just pointing out were lucky /rare to have OBD1 on a Nreg highline and then was taken out of preportion, this debate could go all day as like on rs turbo's whether dump valves actually help or not, at the end of the day your car is wat you make it.................

[badboyV6 4]

OMG!!!! yet another OBD1 and 2 engine debate lol! lol Think i might write to VW to get the definitive answer to settle this argument! :-)

[Eat this 2]

good idea!!!

[BoostedOne 0]

Debating over it is silly, even though I threw my $.02 in. Fact of the matter is, you got what you got. Its just that alot of OBDI guys are so friggin scared of OBDII that its funny. Its like all the old timers that acted like it was the end of the world when EFI came along. All those misguided individuals that ripped perfectly good EFI systems off to put on carburetors..ack.

Yes, in 1996, modifying an OBDII car would have been a challenge. But as time goes on, that system gets hacked and figured out too. If I could snap my fingers and my car be OBDI or OBDII, I would take II. But will I go out of my way to get that way? Hell no, my Golf II has a distributor OBDI VR swap, as archaic as it gets.

[fritzenberg 3]

i thought engine covers that have VR6 DOHC on them are OBD1 and covers that have 2.8 VR6 on them are OBD2??

[Eat this 2]

i THINK mine has dohc on it and mines an obd2