hi i have a 1993 audi 90s v6 and it just wont start have taken it to several mechanics and they suggest that i change the ignition module well i have done that and still nothing then they suggested that i change the coils so i did still nothing then they said it might be the crank sensor but when i went to purchase the crank sensor i was told that the vehicle did not come with crank sensor does any body know what else i can try. the car acts like it has no gas however it does the fuel pump is working besides the car will turn on every once in a while but as soon as you turn it off thats it wont turn on again.