问:发动机曲柄但不会开始。2002年的福特F150

偶尔引擎曲柄但不会开始。变得更糟。我有燃油泵继电器检查和很好。购买一个新的。检查燃油压力一旦它开始。这是32 psi。失去了不到5%时关闭,更换燃油泵。还有同样的问题。没有得到任何的燃油系统相关代码,但我并不总是听到继电器或泵,当我打开点火开关接触。有时候需要5到6次我听到它,它将开始。 Beginning to think it's the computer/module. When driving it runs fine and never dies. Have this problem only when I shut engine off. I have gotten a p0174 code and have fixed everything related to that but it'll come on sometimes within 10 miles and sometimes after 300 miles after clearing code. Please help. Driving me nuts and I can't afford a new vehicle payment.

我的车有152000英里。
我的车有一个自动变速器。