January 13, 2012I am having a problem with the truck starting. It is an intermittent problem. Sometimes it starts very quickly and sometimes it cranks for about 10 seconds before it starts. After research I found that it is probably a fuel pressure issue which could be caused by the fuel pressure regulator or the fuel pump bleeding off the pressure. My question is which one is it? I would change the fuel pressure regulator if wasn`t such a big job. I hear you have to take the intake apart. The fuel pump is also a big job, so I don`t want to do the wrong job. The truck is a 1999 with a 4.3. The fuel pump has about 90,000 mile on it.
Forums : Engines-Gasoline : Fuel pressure problem (1491 Views)
Subscribers : masterdeluxe
January 13, 2012On the v-6 you have to remove the Black upper part of the in take and the Throttle body.
A fuel pump will usually go out around 100k. My 350 99 OBS went at 98k in the drive thru at Wendys, Yuk cold Burgers!
One way to check if it is the Fuel Regulator is to run the engine for a short time and put a fuel pressure gauge on the on to truck after truck is off. There should be a gas line pressure check valve on the main fuel line. Check pressure and see if it bleeds down after it sits awhile
January 14, 2012The problem is intermittent. What if I check the pressure at a time when it doesn`t do it. From the sound of what you are saying, I should probably change them both.
February 11, 2012I finally changed the fuel pressure regulator. The truck started great for about 4 days. Now it is worse than before. What should I do next?
March 5, 2012I have now changed the fuel injector spider. It is still hard to start. If I turn the key on for about a minute before starting, it will start right away. Is it the fuel pump or TPS or something else? I don`t want to just change parts until the problem is fixed. The truck idles smoothly and runs great after it is started.
March 10, 2012I now am thinking about adding an inline check valve in the fuel line. The fuel pump must be working because the truck idles great and runs great. That is why I am thinking that the check valve in the fuel pump is bad. Has anybody done this? What are your thoughts about doing this?