Question about 1998 GMC Sierra

1 Answer

98 GM 5.7 slugish @ 70

I have a 1998 GMC 5.7 K1500 and always act as if it is not getting enough fuel. When I am on the highway doing between 60 and 70 miles per hour it acts like the motor is starved for fuel until it goes into passing gear, after being @ 3000 rpm for a second or two, it takes off like ive put a shot of nos to it, once it kicks back down into drive (2000rpm) and the RPM's settle... i have reserve power for a mile or two and the whole problem starts over again .... all this in repitition .

Posted by on

  • ccn7 May 11, 2010

    Fuel pump might be weak, do a fuel pressure test, and chg. fuel filter if you havent already.

  • carhob May 11, 2010

    is the check engine light on,if yes scan it,if not,when was last tune up?

×

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Corporal:

    An expert that has over 10 points.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 13 Answers

Sounds like it is starving for fuel...the other guys sound right...check your fuel filter and fuel pressure...if the filter is nearly stopped up the pump would build pressure which would "push" past the filter and make it feel more powerful...then as the pressure drops it starts to starve again until the pressure builds up enough. Also, with the vehicle parked and running, get someone to rev it up while you feel the air coming out of the exhaust...if it isn't a good amount of pressure coming out of the tailpipe, your converter may be stopping up. be careful not to get burned by the exhaust though.

Posted on Mar 13, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

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

Hi,
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.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

Chevrolet suburban LT 1500 LT won't disengage from four-wheel-drive


Chevrolet Suburban Questions - 4 wheel drive does not ...

www.cargurus.com > Questions > Chevrolet > Suburban

CarGurus4 wheel drive does not work - When I put the Sub in 4 wheel drive, low of high, ...Asked by Robert_Holland_073 Dec 17, 2009 at 04:06 AM about the 1994 Chevrolet Suburban K1500 4WD ... it can seize up and then the trans case may ingage but the hubs won't be locked in so it ... 1999 Chevrolet Suburban K2500 LT 4WD.

Chevrolet Tahoe Suburban 4 Wheel Drive Indicator Lights - Car ...

forums.edmunds.com > Chevrolet > Chevrolet Suburban

Oct 2, 2007 - 31 posts - ‎19 authors
My 1999 Tahoe (odo reading 137,400 miles) won't go into 4 wheel drive. .... I have a 98 suburban 1500 4x4 LT 5.7 L with 165,000 miles ... I recall once forgetting todisengage 4WD and I could feel a terrific binding when I ...
Step by Step Troubleshooting 4wd 4x4 88-98 Chevy GMC ...? 21:32https://www.youtube.com/watch?v=Su9Dkrfd_ZgJan 20, 2014 - Uploaded by rwdellingStep by Step Troubleshooting 4wd 4x4 88-98 Chevy GMC Truck. rwdelling .... Mine is acting like it is NOT pulling with the fronts,won't engage. ... Have you ever adjusted or the shift cable on your 1500 Chevy ... GM 246 transfer case, 2000 Chev Suburban- Duration: 20:09. by spelunkerd 286,045 views.GM Troubleshooting Part 13 - 4WD vacuum actuator & cable ...? 5:11https://www.youtube.com/watch?v=CbEF6PyJdU0Feb 3, 2011 - Uploaded by mr diyguy123I tacked on this video about the 4wd sys. ... I have a 1994 ChevyS10 ... My S10 won't let you go to 4 LO when your in gear. ... the front end to keep them disengaged. when you put it in 4wd, the vacuum actuator pushes a gear ...

Dec 25, 2015 | Chevrolet Cars & Trucks

2 Answers

P0300 code


sounds like you have checked a lot of things if it was mine I would do new intake gaskets, I had a 2002 Sonoma I did a lot of what you did and every time I gave it back to owner a few days later lite was on and p0300 I did intake gaskets and its been good 2 yrs now,not sure what gaskets you got but gm use plastic ones I got new gm ones and they were aluminum type call gm dealer parts good luck

Mar 05, 2015 | 2005 GMC Sierra 2500HD 4WD

2 Answers

Gm serpentine belt routing


There's a routing diagram sticker under the hood. Look for it on the radiator support , the front shock tower or on the hood itself.
type this on google and see what you get...gmc k1500 serpentine belt routing diagram

Jul 24, 2014 | GMC K1500 Cars & Trucks

1 Answer

Gm diesel 6 5


Have to service these a lot it's the MAP sensor ( manifold absolute pressure sensor ) this should fixya.

b8f6a7d4-6342-4203-9911-2ab2bef97c0f.jpg

Nov 25, 2013 | 1999 GMC Suburban

1 Answer

98 chevy k1500 will fire then die right away will not stay running


That is usually the fuel pump in the tank you to check the fuel pump pressure in all conditions as these are sensitiveJohnny

Mar 16, 2012 | 1998 Chevrolet K1500

1 Answer

I have problems with my 98 chevy k1500 pickup on the highway. Once i hit about 65 mph it wont accelerate and it backfires. also, after i come to a stop and try to accelerate up to highway speeds again,...


If it is running bad enough to be backfiring, the Check Engine light should be on. I would start with scanning the engine computer for fault codes.

Feb 20, 2011 | 1998 Chevrolet K1500

1 Answer

My ac in my 98 chevy k1500 does not get cold sitting still


If at idle it doesn't get cold but at highway speed it does, the system could be low on charge, or the compressor may be worn and isn't generating enough pressure in the a/c high side lines, or the orifice tube is blown out.

Aug 11, 2010 | 1998 Chevrolet K1500

2 Answers

Have a 98 gmc 5.7 truck have to prime to start truck.


Sounds to me like either your pressure regulator is bad or you have a loose fitting somewhere in the fuel line from the fuel pump to the engine. When you turn your key to the on position, you should hear the whine of the fuel pump until it builds pressure. When you shut the truck off the pressure regulator should retain the pressure for a certain amount of time but if it don't close then air is allowed into the fuel line and the fuel drains down to fuel line away from the engine. Next time you try and start the truck after it has sat for a while try turning the key on until you hear the fuel pump whine shut off, then repeat it 3-5 times and then try to start it. Basically that is running the pump enough to get the fuel back up to the injectors. Check for loose fittings in the fuel line, or cracks in the fuel line and if all that is fine then replace the regulator.

Hope that helps

Oct 03, 2009 | GMC K1500 Cars & Trucks

1 Answer

Dash goes dead and sometimes the truck fires & stalls quickly.


GM is known for faulty ignition switch on that model.

Jul 08, 2009 | 2000 GMC Yukon XL

1 Answer

1996 GMC K1500 Pickup Starting Problem


i would try a fuel filter first. the fuel gauge going crazy is most likely the sender they go bad and eventually stop working. the bummer is you have to replace the fuel module. these aftermarket are about 200 bucks. the module comes with the pump and sender which is the next part you want to look at. gm has some issues with the harness to the fuel pump externaly. it actualy will melt and start to lose conection. i would check this by visualy inspecting the plug on top of the tank. unplug it and take a look. if it is at all disscolored replace the pump (module). the new pump comes with a replacement harness (make sure its in the box)hope this helps and good luck

Feb 03, 2009 | 1998 GMC Sierra

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

286 people viewed this question

Ask a Question

Usually answered in minutes!

Top GMC Experts

yadayada
yadayada

Level 3 Expert

63661 Answers

Freddy

Level 3 Expert

1311 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21987 Answers

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

Answer questions

Manuals & User Guides

Loading...