Vauxhall Vectra injection fault

Smoke when accelerating on a petrol? Hmm, that's not good. Excessive fuel consumption and stalling definitely point to fuel delivery issues. Have you checked for any obvious fuel leaks around the injectors or fuel lines? Also, have you scanned the car for any error codes? That would be my first step before digging any deeper. Sounds like a bad leak to me.

Cheers for the reply. I haven't spotted any visible fuel leaks, but I haven't scanned for error codes, to be honest. Where exactly should I be looking for fuel leaks around the injectors? Are there any specific areas that are more prone to leaking? And what kind of cable or connection could be defective?

Ok, so look closely at where the fuel lines connect to the fuel rail and where the injectors plug into the fuel rail and the inlet manifold. Any dampness or smell of fuel? As for cable or plug connections, its hard to know! Often, it's the injector plugs themselves that get brittle and crack over time, leading to poor contact. Given the symptoms and lack of obvious leaks, I'd seriously consider taking it to a workshop for a proper diagnosis before throwing parts at it. These things can be tricky.

Thanks, appreciate the advice. Took it to the workshop, and you were spot on – a defective plug connection to one of the injectors was the culprit. They sorted it out for 95€. Runs like a dream now!