S52 question

[blown9746]

So I was told my car was swapped with a 99 S52 with OBD1 intake, but still OBD2. I know the intake is OBD1 style. My question. How to tell if it is actually running OBD1 or 2?

[2mAn]

What ECU is it running on?

[ForcedFirebird]

Easy tell is where the crank sensor is. If it's on the timing cover, it's OBD1, if it's on the back of the block, down by the starter, it's OBD2.

[moatilliatta]

Or OBDII had a hole in the block by the starter for the crank sensor. M52/S52

I have an OBDI block running OBDII with the Euro crank sensor.

Head gasket should say 3.2 on it by the T chain tensioner.

[blown9746]

Thanks. I checked the DME VIN and it is from the 99 M3. Now to find if / where they put a diagnostic port

[eternal24k]

Thanks. I checked the DME VIN and it is from the 99 M3. Now to find if / where they put a diagnostic port

you may not have an OBD2 port, but an OBD1 to OBD2 adapter works

[ForcedFirebird]

you may not have an OBD2 port, but an OBD1 to OBD2 adapter works

You mean the round diag port? You can actually just jump a couple wires and skip the adapter.

[eternal24k]

You mean the round diag port? You can actually just jump a couple wires and skip the adapter.

Can you elaborate? I have always used an adapter since my scanner has OBD2 plug, so I have an adapter to plug into the round OBD1 port to read my codes. Curious what you're doing

[eternal24k]

You mean the round diag port? You can actually just jump a couple wires and skip the adapter.

Can you elaborate? I have always used an adapter since my scanner has OBD2 plug, so I have an adapter to plug into the round OBD1 port to read my codes. Curious what you're doing

[ForcedFirebird]

The scanners only need to see power, ground and k(l)-lines. Those adapters just jump those corresponding wires.

Basically, I have a home made version of this: https://www.teewigo.com/ping-obd2-di...18-obd-break33

This not only allows me to scan swapped cars that never had an OBD port installed, I can bench flash ECU's as well.

[eternal24k]

ok gotcha. For $11 to get the round plug adapter, I will just keep going that route