Please delete

[freethebikes]

Nevermind

[vpilarrt]

I would guess the O2 sensor. Have a known good one to try?

[freethebikes]

My understanding is that the o2 sensor wouldn't make the car completely cut out, just run like crap. Not only that, I don't know if it'd make sense that the car runs totally fine with the diagnostic cap if it's a bad o2 sensor.

Let me know if my assumptions are wrong.

[jlevie]

When the engine cuts out does the tachometer needle drive towards zero when the transmission is in gear and the car moving? That could mean a DME shutdown, in which case you should also see the CEL. Or it could mean a problem with timing data from the CPS. But if the tachometer doesn't react I might suspect leakage in the cap involving pin 1, which goes to the ignition coil.

[freethebikes]

Thanks again

[freethebikes]

No one knows what the diagnostic cap connects/disconnects?

[EatsHondas]

No one knows what the diagnostic cap connects/disconnects?

Wouldn't hurt to spray the pins/sockets in the diagnostic cap with contact cleaner...

This may help too:

http://84.45.115.78/e30zonewiki/index.php/Diagnostic_Plug

[vpilarrt]

C101 is not the diagnostic connector

[jeffnhiscars]

Doesnt the cap on the diagnostic plug have jumpers in it ?

[EatsHondas]

C101 is not the diagnostic connector

Ah you're right, the diagrams make it look very similar. Didn't notice the lack of the Pac-man looking bit in the middle.

[freethebikes]

No

[jeffnhiscars]

yes. I'm not sure which pins get connected but I know that there are are pins for holes numbered 18, 19,20 and 15,16.

That would sure point to finding a good working cap to try. Let us know if that works

[freethebikes]

Hmm

[freethebikes]

I've searched through manuals, trouble shooting guides and still have found nothing useful.