I got a 2002 Audi a6 off road car starts but won't stay running I start it put in great and it sputters and dies and also it is in limp mode fourth gear o only doesimp more have anything to do with it dying when I put in gear or is it fuel related I'm stumped any help out there with this issue would be great I'm not gonna take to the shop I will fix I myself after I figure out what it is that needs to be fixed please help Thanx