Im posting for a buddy of mine, he just bought a truck and it wont stay running... after the dealer he bought it from threw a ton of parts at it, the deisel shop they took it to found that it needs 4 injectors for a 2003 F-250 with a 7.3. He needs 3 AD and 1 AE, or 4 AD injectors. either way he just wants to get them in so he can drive his truck. Can anyone help??