Chevrolet Q&A

Ask Your Question

2002 Chevrolet Silverado 1500 Question: not holding fuel pres.

 

Question

empire102, 4.8L V8, Summerville, SC, September 26, 2009, 04:28
 Rookie

have to crank 4-5 times before it will start have new fuel filter and replaced fuel pump 1 year ago

2 Answers
Flag This
  • Medium-star Best Answer
    patrick mannion from Greg Solow's Engine Room, September 26, 2009, 08:42
    Profile_thumbnail
     Master

    Without being able to do tests its hard to guess, but I would Tee in a fuel pressure gauge crank over the engine watch the fuel pressure, switch off the engine it should hold fuel pressure for a period of time, if it drops immediately I would pinch of the return line after the fuel rail/fuel pressure regulator and repeat the test see if it now holds fuel pressure. If it does the fuel pressure regulator may be bleeding of pressure, if the fuel pressure still drops look for a leaking injector but this would show up in a big cloud of black smog on start up, bad fuel mileage and fouling of the spark plugs.

    Reply
    Flag This
  • Answer #2

    September 26, 2009, 10:24
    Profile_thumbnail
     Master

    Try the starter or maybe the flywheel has torn Teeth

    Reply
    Flag This