Phantom no start condition

[delphini]

Ok guys need some input. 87 325i auto 180 thou. Newish ecu feul pump and relay. Traced issue to the obc black box and the two con nectors that plug into it. When i wigle them the car stalls ...So is the box bad or the wiring? I can find no shorts in the wires leading up to the harness....any ideas?

[jlevie]

I suspect that it is the code relay that is causing this. Since wiggling the connectors reproduces the problem, you need to critically examine the connectors for faults and check the wiring between the OBC and code relay. If that all checks out the cause is likely to be in the OBC. You can get the wiring diagrams from http://wedophones.com/BMWManualsLead.htm