my engine on my 93 525i idles just fine but when i drive it the engine shuts down completely after 10 or more miles. When i restart it, it will crank just fine like nothing happen but it will shut the engine again after so many miles. Sometimes the engine just jerked like is going to shut down. I check the fuel system and it seems fine. Does anyone out there have the same problem with 93 bmw 525i? help!!!