The Official OBD1 vs OBD2 argument thread.

[etxxz]

We could organize an OBDII section on the 24v wiki page....

i think that's a good idea. My once awesome OBDII / EWSII kamasutra thread is now utterly abandoned with most pictures/links down. I will take some time this weekend to shine it up and update some of the info such that i can be loaded to the 24v wiki page. I'm 6 OBDII cars in fully functional with Diagnostics port and all, plus who knows how many other cars used my thread so its worthy.

Imagine i did it up in 2007! first car i ever wired..

[RobertK]

I understand they will be able to flatbed/tow it away - but they could never start it.

the thieves around here are not that skilled - they're mostly meth/coke/heroin addicts, looking for an easy smash and grab, maybe a joy ride. they aren't going to have the organization or resources to tow your car away with a flatbed or a truck.. and they certainly don't have the skills/tools needed to defeat EWSIII.

Ahhh.. Please forgive my simple East TN mentality. I doubt many of our criminals would even know how to hot wire a car.

Of course E30s fly under the radar because they don't have 22 inch wheels or because "dem BMdubbyas is to expensive and hard to fix on."

[mammoth_e30]

Maybe more people would do it if there was an organized, comprehensive guide? Honestly I have been reading up on it recently and most of the info is old, contradictory, and scattered throughout random build threads which don't really help. What we need is something like the 24v wiki page with all the info in one organized place that just states exactly what needs to be done, how, and the different options available to do so.

We could organize an OBDII section on the 24v wiki page....

[nando]

I know its not that complicated but its really doesn't add any real world anti-theft benefit.

Chances are, if someone is going to steal your E30 EWS is not going to stop them. In fact, its more likely to screw up and leave you stranded than to ever prevent an actual theft.

I understand they will be able to flatbed/tow it away - but they could never start it.

the thieves around here are not that skilled - they're mostly meth/coke/heroin addicts, looking for an easy smash and grab, maybe a joy ride. they aren't going to have the organization or resources to tow your car away with a flatbed or a truck.. and they certainly don't have the skills/tools needed to defeat EWSIII.

[mammoth_e30]

I don't see what's so hard to understand.

For OBDII Swap into E30 you need:

- M52 or S52 ECU (Flashed to have EWS and secondary emissions removed)
- OBDII Engine Harness wired for your E30
- Modified Oil Dip Stick (if you intend to keep the OBD2 CCV setup)
- OBDI Fuel Rail

The rest of the install is like any other 24v swap. Please chime in if I left something out and I will add it to the list.

There's no reason to worry about the EWS key stuff if your ECU is appropriately flashed unless you are really so cheap you cannot afford to pay to have it done.

I used the OBDII intake manifold and fuel rail.

Also needed (IMO to do it 100%):
Any ODBII engine specific part the wiring harness connects to (most should come with the engine)
-MAF
-Throttle body
-CPS, knock sensors etc
-Fuel tank breather valve
-Fuel pressure regulator
-idle control vlave
-3/2 directional control valve (fuel)
-Four O2 sensors
-emissions control airpump
-Pressure regulating valve / Oil Separator (connects to modified dip stick)

OBDII Emissions equipment:
-Carbon canister
-Fuel tank pressure valve

And while you are at it you may as well wire the OBDII Diagnostic port. Mine is working and giving me code and it is just 4 wires if you have everything else wired correctly.

Edit: Also because I am in Cali if i want to smog my car I need to have all OBDII emissions related equipment so I really had no choice.

[RobertK]

I hate car alarms.

I'll probably end up with EWSIII. it's really not that complicated. :)

I know its not that complicated but its really doesn't add any real world anti-theft benefit.

Chances are, if someone is going to steal your E30 EWS is not going to stop them. In fact, its more likely to screw up and leave you stranded than to ever prevent an actual theft.

Why do you need an OBDI fuel rail? I'm running the OBDII rail on mine along with the FPR that was under the car on the e36.

No not needed, just makes for a simple setup if you have extra OBD1 parts handy. Honestly I could go either way with the fuel rail, I just prefer the OBD1 FPR in the fuel rail.

[nando]

In an E30 I really see no reason to keep it. Too much headache when a nice car alarm can provide similar protection along with keyless entry.

I hate car alarms.

I'll probably end up with EWSIII. it's really not that complicated. :)

[luckysnafu]

Why do you need an OBDI fuel rail? I'm running the OBDII rail on mine along with the FPR that was under the car on the e36.

[RobertK]

you don't actually need to remove EWS. you could just install it..

In an E30 I really see no reason to keep it. Too much headache when a nice car alarm can provide similar protection along with keyless entry.

[nando]

you don't actually need to remove EWS. you could just install it..

[RobertK]

I don't see what's so hard to understand.

For OBDII Swap into E30 you need:

- M52 or S52 ECU (Flashed to have EWS and secondary emissions removed)
- OBDII Engine Harness wired for your E30
- Modified Oil Dip Stick (if you intend to keep the OBD2 CCV setup)
- OBDI Fuel Rail

The rest of the install is like any other 24v swap. Please chime in if I left something out and I will add it to the list.

There's no reason to worry about the EWS key stuff if your ECU is appropriately flashed unless you are really so cheap you cannot afford to pay to have it done.

[VinniE30]

Still have people converting to OBD1 for no reason. PLEASE PEOPLE READ THIS THREAD AND BE INLIGHTENED!!!!!!!!!!!!!!!!! ;)

Maybe more people would do it if there was an organized, comprehensive guide? Honestly I have been reading up on it recently and most of the info is old, contradictory, and scattered throughout random build threads which don't really help. What we need is something like the 24v wiki page with all the info in one organized place that just states exactly what needs to be done, how, and the different options available to do so.

[Gooch]

Glad this thread was bumped. Is anyone successfully running an OBDI fuel rail on an OBDII motor? I'm attempting to, however the wiring harness for the rail interferes with the mounting for the fuel rail cover.

I really don't want to have to source and mount the OBDII FPR and I want to retain the fuel rail cover. The more I look at it I don't think I can get away with doing what I want to do and will have to either hack up the OBDI rail and lose the cover or use the OBDII rail and mount the FPR somewhere.

[328ijunkie]

Still have people converting to OBD1 for no reason. PLEASE PEOPLE READ THIS THREAD AND BE INLIGHTENED!!!!!!!!!!!!!!!!! ;)

[lolcantturn]

Secondary bump


also answer my PM! ;)