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  1. #1
    Jr. Apprentice
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    Default Intermittent starting problems

    I have a 2001 GMC Sierra 1500 with a 4.8 v8 at ps pb ac 4x4.I have been having starting problems where sometimes I go somewhere then it won't start,turns over fine,gas in tank.I had to tow it home saturday,was going to work on it today.I was sitting in the backyard when I bumped the button on the remote starter fob and I heard my truck start,I have had people say fuel pump,fuel pressure reg.,I'm scared to take it somewhere to plug a code reader in, I can't afford to have another towing charge. Any ideas ?

  2. #2

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    How far you away from Iowa??...i have about every scanner you could think of and about every tool/specialty tool you could imagine...if you have any other troubles let me know and i could possibly swing up their IF your not to far away...i wanna say fuel pressure regulator...if i were you and didnt want another tow charge id run uptown and buy the 49.99 scanner at our local auto parts store...

    2009 Chevrolet Silverado 1500 LT Z71 Crew Cab "All-Star Edition"

    Line-X'd Bed
    Line-X'd Custom Brush Guard(Heavy Duty)
    5.3L Flex Fuel
    275/65R18 Toyo Open Country AT2's
    2" Rough Country Leveling Kit(want to get the 2.5 RC kit)
    EGR In-Channel Vent Visors
    Exterior PLUS Package
    Interior PLUS Package
    K&N Drop-In Air Filter
    ProFlaps
    Cat-Back Dual Exhaust
    Black Bowties
    Diablo Sport Predator(AFM Disabled)
    ProFlaps
    Towing Mirrors
    Next Planned Mods
    Blacked out Tail Lights
    Aftermarket Rims

  3. #3
    Jr. Apprentice
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    Default

    I'm in northern Minn,but thanks for the offer.

  4. #4
    Jr. Apprentice
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    something different when i unplug and replug the fuel pump relay it will start after the 1st of the day,but you have to do this everytime unless you leave it for 4 or 5 hours

  5. #5
    Master Mechanic silverhobey's Avatar
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    Default

    Quote Originally Posted by ChevyBoy2009 View Post
    How far you away from Iowa??...i have about every scanner you could think of and about every tool/specialty tool you could imagine...if you have any other troubles let me know and i could possibly swing up their IF your not to far away...i wanna say fuel pressure regulator...if i were you and didnt want another tow charge id run uptown and buy the 49.99 scanner at our local auto parts store...
    what a nice offer ...Brian
    Silverado Crew.....4.8 L

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  6. #6

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    Quote Originally Posted by bear6232 View Post
    something different when i unplug and replug the fuel pump relay it will start after the 1st of the day,but you have to do this everytime unless you leave it for 4 or 5 hours
    I wonder if it is just a bad relay. Is the relay hot after you run it for awhile?

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
    2002 Silverado ext cab 2wd (Sold)
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  7. #7
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    going to change relay tommorrow,don't think this is it,it's like it thinks there is fuel pressure to start but there is none because after the initial start up the next try it will start and die

  8. #8

    Default

    Have you put a fuel pressure gauge on it? I would see what it does. The pump could be getting warm and not working properly. I doubt that it would take 5 hours for it to cool down though

  9. #9
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    tried todrive around the block after int.start could not make it around the block died when got to my back yard let it set 30 min then it started and finished parking it but would not start right away when i talked to one of my mechanic friends he suggested sawing the exhaust pipe off in front of the cat to see if there is an exhaust restriction

  10. #10
    Jr. Engineer Jamm3r's Avatar
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    Default

    Hello from south of the cities, Bear. My stepkids are up in greater metropolitan Hibbing this week.

    You need diagnostics to get to the bottom of this otherwise there's nothing but expense and frustration.

    Measure fuel pressure at the rail and make sure it's in spec and stays there. Borrow a fuel pressure gauge from someone or buy a cheap one from a parts place.

    Failing that pull the codes. You can get OBD-II scanners for $30 these days and if you have a smart phone you can run Torque and use a bluetooth scanner for a few dollars more and get a better and easier to use setup.

    If fuel pressure is good and no codes then you can explore weird unlikely stuff but chances are those two steps will identify something
    Minneapolis area - 1997 K2500 regular cab long bed + 8.5' Western Unimount plow + modified transmission + 2nd battery + modified camper charge circuit + 1971 Cayo camper -and- 2004 4x4 Suburban 2500 8.1 + Maxbrake controller + 2nd battery + modified trailer charge circuit + Reese receiver, pulls 30' Airstream trailer

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