Question about 1998 GMC Sierra

2 Answers

Truck starts but won't stay running

The truck starts when I turn the ignition but then immediately dies like it's not getting fuel but the fuel pump is running. Most times when this happens, if I leave the key in the ignition in the on position for a short time, 5-10 mins., the truck will start. This happens with no relation to weather or weather conditions.

Posted by on

  • 1 more comment 
  • taysdad Aug 11, 2008

    Yeah I know about that!!! Inherited this truck in feb. It has something to do with PASSLOCK on my model. an anti theft device. My father before passing had ignition changed. was told would solve..... well it doesn't happen as often, but when it does it could be min or hour. It does so usally when this little yellow SECURITY light on upper right side of instrument panel decides to do it's own thing. It will just come on driving down the road!!! But if it's blinking when turning over, no go.

  • Anonymous Mar 23, 2014

    truck starts and runs you can`t turn ignition all the way of to remove key

  • Anonymous Mar 30, 2014

    Truck will not start at all

×

2 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Top Expert:

    An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

  • GMC Master
  • 60,867 Answers

You may have a problem with the contacts in the ignition switch (not key part), when you crank the engine a signal is sent to the fuel pump to run, when it starts and you let off the key another set of contacts keeps the pump getting power Through a relay), these are known as crank and run modes.

Posted on Aug 04, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Dodge 2001 3/4 ton had tiny pin hole on top of transmission pan. Got home from a short drive and the transmission fluid leaked vigourously on the ground. We wanted to get back home, so we have jb welded the hole, put transmission fluid in. The battery was drained because of the light my husband used to help cure the jb weld. We jump started the truck and it would turn over and run but I had to push in on the gas peddle to keep it running. If I take my foot off it dies. I am able to start it back up but I still have to step on gas peddle. What is wrong with our truck?

Posted on Dec 28, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

94 Toyota Camry ignition lock cylinder issues


The problem of the car dying should be unrelated to the worn key and ignition barrel, as the electrical contacts only depend on the key turning, which it does.

The car may have -

- a vacuum leak somewhere in the intake tract. Look for a split in the big flexible coupling after the air cleaner

- insuffiicient fuel pressure. This might be a blocked filter, pinched fuel line (from a rock), failing pump, or a faulty overpressure release valve in the fuel rail. Get a fuel pressure gauge connected to the fuel rail and see what it reads.
.

Oct 03, 2016 | 1994 Toyota Camry

1 Answer

My 1990 olds cutlass supreme will not stay running it has fuel and has spark. It will start then dies immediately. Any tips has brand new fuel pump


It could still be a fuel problem. The only way to be certain is to put a fuel pressure tester on it. Autozone may rent or loan fuel pressure gauges. Easy to hook up to the shrader valve on the engine fuel rail and test fuel pressure. With key on, pressure must be over 40 psi, 40-44psi is what is called for. If pressure drops below 40 after it starts, then you know it was a fuel problem. Either the fuel filter is clogged, or the pump quits because the oil pressure switch is faulty. That switch is tied into the pump circuit, keeps the pump running after the engine is running.

If fuel pressure stays good, maybe problem is in the ignition system. Have the Ignition Control Module tested, also the crank position sensor.

Feb 17, 2016 | Cars & Trucks

1 Answer

Engine cranks fine, but will only run 5-6 sec then dies. If you press the gas, it sputters and dies immediately.


Seems like a fuel delivery problem.
May be a bad fuel pump, clogged fuel filter or a fuel line problem.

What car make/model? What engine?

When it dies, try to turn ignition off immediately, wait a couple of seconds and turn the key quickly to the crank position (don't wait with the key in ignition-on position so that the fuel pump doesn't try to pump fuel into the fuel lines).
If it hesitates to start or runs significantly shorter before dying, you have pinpointed a problem with the fuel system.

Pls let me know what you find out.

Nov 27, 2015 | Cars & Trucks

1 Answer

97 marquis fires up but dies


Do you have power to the fuel pump once the key ios released? Try this, start the engine and carefully let the ignition switch back off until the starter is not engaged, does it stay running? If so you need a new ignition starter switch, the switch is located on the top bottom of the steering column under the dash.

May 16, 2012 | 1997 Mercury Grand Marquis

2 Answers

Chevy Malibu 2003 cranks but won't start! I know


You might have a defective fuel tank pressure sensor!

May 05, 2012 | 2003 Chevrolet Malibu

2 Answers

03 Beetle fuel pump runs even after ignition is turned off. Also when cranking will fire then die immediately. Raw gas coming out of tail pipe after several attempts to start


FUEL PUMP RELAY FAULTY.FLOODING OUT THE ENGINE.FUEL PUMP RELAY REMAINING CLOSED ENERGIZED CAUSING FUEL PUMP TO RUN WITH THE ENGINE OFF.

Sep 25, 2011 | Volkswagen Beetle Cars & Trucks

2 Answers

Spray a shot of starting fluid in throttle body and it starts but dies almost immediately after it starts and needs another shot of starting fluid to start again. Once it starts again it dies almost...


Sounds like u have a fuel problem. The engine is not getting the fuel it needs thats why when u spray the starting fluid in it runs then dies when it burns it up. check the fuel pump and see what kind of psi your getting.

Oct 21, 2009 | 1989 Jeep Wrangler

1 Answer

85 nissan 300zx turbo


alternator and mass air flow meter.
see my solution above.....
h

Jul 28, 2008 | 1985 Nissan 300ZX

Not finding what you are looking for?
1998 GMC Sierra Logo

3,083 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

60867 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21949 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6811 Answers

Are you a GMC Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...