[schelling]

2001 ford f250 7.3 diesel, leaking fuel. When running a/c get diesel smell inside cab. A friend mention something about a huey pump. Need help Lenny

[scril]

"Heuy" as mentioned above refers to H.E.U.I. Which stands for Hydraulic electronic unit injection, using both oil pressure and electronic signal to activate injection. However, referring to odour you smell I would first look for any visible leaks under the hood from possible low pressure line such as the return line or supply to the injection pump. A leak in a high pressure line would result in poor performance and you would immediately notice missing. Not to mention an abundance of fuel. As well if a leak is present, air may also enter the system causing poor performance and so on.