i got a 1990 audi 90,i got a problem with it startin,tries 2 fire when u first start it then it seens 2 stop trying 2 fire,i do mech. work on the side,but just starting 2 get my feet wet on the german/euro cars,fuel pump seems 2 be fine,swapped it out allready.got spark evan after it stops trying to run.any info would be appreciated,thanks matt17