Question about 1999 GMC Sierra

1 Answer

Hard start after warm. no light on. Fuel pressure good. fuel filters replaced. I have to floor it to start then takes awhile to catch. acts like running out of gas. Then works again.

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert that has over 500 points.

  • Expert
  • 401 Answers

Sounds like it's somehow getting flooded.

Posted on Oct 21, 2013

6 Suggested Answers

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

  • 34 Answers

SOURCE: 1997 GMC K1500 4x4 5.7 SFI injection system

I would check the fuel lines themselves and make sure there is no blockage. If not you might want to check your fuel injectors and see if they need to be replaced. also make sure you didnt install fuel filter backwards.

Posted on Nov 20, 2008

  • 2039 Answers

SOURCE: hard starting after sitting awhile

if before you start if you hold the gas pedal just a bit does it start faster if it does its our idle air control valve that defective (iac) let me now pierre

Posted on Jan 25, 2009

  • 202 Answers

SOURCE: 98 gmc jimmy loses power to a stop

the fuel pump could actually be malfunctioning. and the reason that you are able to restart and drive again is because when you turn the key on it is allowing the fuel pump to pressureize your system. but while the fuel pump is continuasly running it is loosing the fuel pressure. this is common on the cheap fuel pumps. i am not sure about were you got the fuel pump from but in all of my experiances with this problem i find that the fuel pumps have been boughten at a napa store.
i hope this helps you out.
and you could attach a fuel pressure gauge on to the fuel rail and start the car and watch the pressure to see if it is droping.

Posted on May 22, 2009

  • 15 Answers

SOURCE: 1995 safari van w stalls when giving it gas.

maybe your iac valve is not working? it takes place of a choke or temp sender to computer could be bad which controls t I.A.C. known as the idle control valve,do you have any codes?

Posted on Sep 01, 2009

  • 12104 Answers

SOURCE: my 99 gmc sonoma wil start and drive fine untill i

if no codes yet check and clean egr valve ,pcv valve,air filter and/ fuel pump and pressure regulator may b dropping under load

Posted on Oct 27, 2009

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

Low fuel pressure 99 cherokee classic

either fuel pump but change fuel filter first and see if it helps

May 13, 2012 | Cars & Trucks

1 Answer

My truck starts then after warming up when i put it in gear it stales out and want start, ecept when i haold throttle to the floor and then acts like it is flooding

george, 1st did you replace the fuel filter , take it off and shake it and dump it out into a bowl to see whats going on in your fuel tank, then a pressure fuel test would be nice, and then a spark test.. could be coil or the tfi on the distributor .

Dec 08, 2011 | 1992 Ford F250

2 Answers

I have a 1996 Plymouth Breeze... That won't start,

Hi, this sounds like a bad fuel pump. I would have the fuel pressure checked. Sometimes Autozone will let you borrow a fuel pressure gauge to check your fuel pressure. Just unscrew the cover from the pressure port on the fuel rail and screw on the pressure gauge. Put a rag over your hand while screwing it on to avoid getting fuel sprayed around. Lay the gauge in a safe place and start the car. Read the gauge, record the reading, turn the car off and remove the gauge. If the pressure is less than 35 psi, you need a new fuel pump. Please let me know if you have questions, and thanks for using FixYa.


Sep 13, 2011 | 1996 Plymouth Breeze

1 Answer

When i go get gas and i try to start my car it acts like it dont wanna start. Then when it do it acts like it dont want to catch speed.

Have you ever had the fuel filter replaced? also have a fuel pressure test done on your car, you could either have a fuel pump or pressure regulater problem..
Hope this helps! Good Luck!

Sep 13, 2011 | 2005 Ford Five Hundred

1 Answer

Keeps cutting out and dies than takes awhile to start mainly on hot days

If fuel filter hasn't been changed lately, I'd try that, as well as get a fuel pressure test done on it when warmed up to point where it normally would start to act up. Not unusual for fuel pumps to start losing pressure when warmed up /hot .

Jun 22, 2010 | 1997 Plymouth Voyager

2 Answers

I have a 1999 chevy express 1500 van with 5.7L engine. When engine is not hot it will not start without starting fluid, when warm starts ok. After it is started it runs fine under normal driving but if I...

Clean fuel, clean filters, clean pvc, and since its a '99 try an emissions flush, your e-vap canister is most likely cloggeg, or even a faulty egr valve,

Jun 08, 2010 | 2000 Chevrolet Express Cargo

1 Answer

My 2002 LS is hard to start after it sit awhile I change the fuel filter and the spark plugs and the coils on each plug but it still hard to start could it be my fuel pump is losing pressure when it sit...

it is very possible and i can tell you a way to help you see if that is the issue. after your car has sit a while (as long as it usually takes before it acts up) jump in the vehicle and turn the key to the postion just before the vehicle begins to turn over when all the dash lights come on. when the key is put in this position the fuel pump runs for a few seconds and then stops until vehicle is cranked, allow the pump to run for 5 seconds then turn the key back off. then return the key to the "run" postion i mentioned before and wait a few seconds then try to start it. if it fires right up you have allowed the vehicle to build fuel pressure before you started it, indicating you have a fuel pressure issue and you are most likely looking at a weak fuel pump.

Dec 10, 2009 | 2002 Lincoln LS

3 Answers

1998 Chevy tahoe Hard to start when cold

replace your MAP sensor(manifold absolute pressure) the map sensor is the computer for your fuel pressure regulator telling how much pressure. Unless your tahoe runs like **** going up hill than it inevitably your fuel pump

Feb 17, 2009 | 1999 Chevrolet C/K 2500

1 Answer

1995 Ford F-250 replaced fuel filter and alternator, but the truck runs for a few miles then it stalls...or acts like it is out of fuel. it will not start until it has been setting for awhile

Sounds like fuel pump could be on it's way out. Obviously you don't have access to a fuel pressure tester for when it's a no start situation, so maybe try this. Grab a can of WD-40 & a screwdriver/nut driver, that will allow you to take intake hose off at throttle body inlet. Next time it quits, remove air intake hose, open throttle plate & spray WD-40 for a couple of seconds into throttle body. Try to start, if it does, for a second or 2, replace fuel pump. I believe what's happening is once the pump gets warm/hot, is quitting, then sitting, it cools down & pumps up to pressure again. This will confirm.

Jan 16, 2009 | 1995 Ford F250

1 Answer

1998 Chevy tahoe Hard to start when cold

Hello, yes the check valve is in the fuel pump assembly. The check valve is leaking and the pump will burn out soon. Unfortunately the aftermarket fuel pumps can be very unreliable. A good portion of problems we see on this site are from people who replace the pump sometimes twice and it still doesn't work.

Jan 03, 2009 | 1998 Chevrolet Tahoe

Not finding what you are looking for?
1999 GMC Sierra Logo

Related Topics:

35 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts


Level 3 Expert

75807 Answers


Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22133 Answers

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

Answer questions

Manuals & User Guides