ok It turns out that my demon coupe quattro 1990 was getting fuel .So what I did was disconnect the mass air flow sensor and the car fired up and now stays running ,Though very badly .Now when its running I reconnect the MAFS and the car stalls as soon as I plug it in .So do I replace the air sensor or could it be somthing else??? Thanks !!
raptor1511

why not just replace the MAF?