Trouble Starting/ Engine dies once in awhile while stopped at a light

Asked by jrodbaseball Mar 11, 2016 at 03:53 PM about the 1999 GMC Sierra 1500

Question type: Maintenance & Repair

My truck will start just fine after sitting for awhile (i.e. overnight), but if the engine is shut off and I try to start it back up in 5 minutes, 10 minutes, 30 minutes later, its hard to start and takes a little (5 sec).  Always starts eventually. Also, when I am stopped at a light, I will feel the truck is about to die, but if I let off the brake it will catch itself and be fine.  Any ideas on what it could be...I'm thinking fuel pump, but after looking at some of the answers on the site to similar questions, it seems like that's not always the case. Also its not the battery...its brand new.

2 Answers
90

HonchoGTO answered 8 years ago

If you let off the brake and it acts differently, then maybe you have a vacuum leak in your brake booster line.

Mark helpful
223,945

Rowefast answered 8 years ago

Hard starting is an indication of leaky fuel injectors, spider lines, and fuel regulator. What size is the motor? So what you do is hook up a fuel pressure gauge to the Schrader valve, then just cycle the key on off until it builds up pressure, should be 56 to 63 lbs. then let it sit with the key off, now just watch the gauge for 3 minutes, the fuel pressure should not drop off more than 5 lbs. If it does, then the injector assembly would need to be replaced as a unit.

Mark helpful

Your Answer:

Related Questions

  • Trouble Starting/ Engine dies once in awhile while stopped at a light 2 Answers

    My truck will start just fine after sitting for awhile (i.e. overnight), but if the engine is shut off and I try to start it back up in 5 minutes, 10 minutes, 30 minutes later, its hard to start and t...

    1999 GMC Sierra 1500

    -

    Maintenance & Repair

  • My 05 GMC Sierra air conditioner blows out warm air once in a while 2 Answers

    My air conditioner blows out warm air once in a while

    2005 GMC Sierra 1500 SLE 4WD Crew Cab SB

    -

    Maintenance & Repair

  • All warning lights light engine dies 1 Answer

    I have a 2000 GMC Sierra 1500 5.3 I'll be driving down the highway when suddenly all my warning lights and both turn signal indicators light ( even 4 wheel drive light and I don't have 4 wheel) t...

    2000 GMC Sierra 1500 SLE Standard Cab LB

    -

    Maintenance & Repair

  • Engin dies at idle 1 Answer

    My 1994 4.3 v six runes rough at temperature and dies for no reason Ive replaced a cap roter plugs wires fuel filter and pump. Egr seems ok I think it's egr sylinoid.

    1994 GMC Sierra 1500 C1500 SL Standard Cab LB

    -

    Maintenance & Repair

  • Ok I have a 1994 GMC 1500 sierra 5.0 305 it dies in gear sound awesome in idle but dies if not on gas 3 Answers

    Ok I have a 1994 GMC 1500 sierra 5.0 305 it dies in gear sound awesome in idle but dies have changed the tps,the EGR Vacuum Solenoid the Idle Air Control Valve , TBI Base Gasket,Fuel Pressure Regulat...

    1993 GMC Sierra 1500 C1500 Extended Cab LB

    -

    Maintenance & Repair

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,840
  • #2
    dragonflyoffshore
    Reputation
    11,750
  • #3
    John Saffrahn
    Reputation
    11,690
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 1500
202 Great Deals out of 5,916 listings starting at $2,975
Used Ford F-150
338 Great Deals out of 15,311 listings starting at $1,712
Used Toyota Tundra
35 Great Deals out of 1,173 listings starting at $8,500
Used Chevrolet Silverado 2500HD
16 Great Deals out of 1,290 listings starting at $9,990
Used GMC Yukon
11 Great Deals out of 952 listings starting at $1,225
Used Toyota Tacoma
56 Great Deals out of 1,060 listings starting at $8,708
Used Dodge RAM 1500
4 Great Deals out of 73 listings starting at $500
Used Chevrolet Tahoe
20 Great Deals out of 927 listings starting at $11,900
Used Ford F-250 Super Duty
24 Great Deals out of 1,210 listings starting at $7,995
Used Chevrolet Corvette
29 Great Deals out of 1,066 listings starting at $15,871

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.