Question about Chevrolet C1500

1 Answer

My 1998 Chevy C1500 5.7L V8 Only starts when i pour gas in the carburetor. The fuel pump is located in the tank i hear it kick on when i turn the key. When i do get it started if i accelerate hard my truck back fires. What is wrong? Please helo

Posted by on


1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that gotĀ 5 achievements.


    An expert whose answer gotĀ voted for 20 times.


    An expert who has answered 20 questions.

  • Expert
  • 77 Answers

The pump can be weak or obstructed, could be fuel filter too.

Posted on Oct 15, 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.
Good luck!

Posted on Jan 02, 2017

  • 1498 Answers

SOURCE: 1997 GMC K1500 4x4 5.7 SFI injection system

Hey there boatright33,

A few things things immediately come to mind.

There may be a problem with the engine controller. You could check the ODBII onboard diagnostics. Auto part stores will usually do this for you at no cost.

When you pulled the ones that were/went bad, how did the filters look? Could there be particulate matter still in the tank causing them to fail.

I always put this one off until last. Check the injectors. Are they gummed up?

Let me know what you find out

Posted on Aug 12, 2008

  • 607 Answers

SOURCE: 1990 chevy silverado fuel pump

It does seem to be a fuel problem, If your engine is fuel injected the fuel pump is in the gas tank. As far as the ground it is grounded through its harness and mounting.. First thing I would do is put a fuel gauge on the fuel rail fitting and check fuel pressures. Pump wil run for a few seconds when the key is turn ON., and then stop ( assuming its working ) A lack of pressure willindicate an inop pump, or even possibly a clog in the fuel filter. Let me know.

Posted on Mar 30, 2009

  • 1509 Answers

SOURCE: truck will start only when gas is put in carburetor

If this truck was running OK and you just went to start it and then it won't start as long as the tank has gas the fuel pump has quit. Sometimes the pump will Wake up with someone cranking the engine and knocking on the fuel tank. But understanding you statement about it starts by adding fuel and it continues to run, the fuel pump is still bad but the pressure the pump is putting out is to low to start. These trucks need 50 psi just to run 45 and they'll start adding poured in fuel and they'll run but if you were to test real preformance after started the engine will be down on power. Tank draining and tank removeall is required to change the pump. The tank is easier to remove with the driveshaft removed. so removeing the lines from the top of the tank is easier as the tank is removed. The presure can be cheacked by putting a fuel pressure gauge onto the fuel rail connector just behind the throttle body near the distrubutor. ( Fingernailing ) the valve to see if theirs gas isn't good as the fuel spraying ( even if it's not high enought pressure) on the distrubutor can get you in a fire problem as I've seen if myself. The tank removal job is a pro job or at least one that should be done where you can put out a big fire easy and not burn other cars yourself and buildings. This is not a do if your selfer job, on a never did one before note. You've done em and are handy and have a good way to remove most of the gas and get it away from the job. good. This job is a common one on GM products. and is the number one cause of shop fires even in a pro shop. Be careful and good luck

Posted on Oct 10, 2009

  • 111 Answers

SOURCE: 1979 chevy step van 350 new fuel pump rebuilt carburetor wont sta

remove the fuel line from the carb, put it into a bottle, crank the engine, If the bottle has fuel in it the fuel pump is working properly, if not, check the filter, and the fuel lines to the tank!!!

Posted on Nov 02, 2009

  • 4 Answers

SOURCE: 94 chevy 5.7L wont turn on the fuel pump

undo the fuel line where it joins the fuel rail to your injectors.. it is under extreme pressure so be careful.. get someone to crank car for a second or two and if fuel sprays out then its not a fuel problem..

Posted on Feb 22, 2010

Add Your Answer

Uploading: 0%


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



Related Questions:

2 Answers

1997 chevy blazer... fuel pump turns on. have to prime to start it. when starts revs then stalls out

sounds like ur fuel pump is burned out (broken impellor) get a new one.
of course she revs and dies if u pour fuel down the carby...duh.

Nov 21, 2013 | 1997 Chevrolet Blazer

2 Answers

I can pour gas into the carburetor and car starts, run until gas is gone fom carburetor. I disconnect hose from fuel pump to carburetor and do not see gas flow. Fuel pump has been replaced. Am thinking...

I would say more than likely your problem is a clogged fuel filter or a bad fuel pump. To narrow this down, listen for the fuel pump 'priming' (making a whining noise from the gas tank) turn the key to the On position and you should hear this whining for about 3 seconds, if you can hear this the fuel pump works fine, if not it is probably time for a new one. As for the fuel filter being that it is a 1987, I would replace it even if it is not clogged, the easiest way to test if it is clogged though is to blow at through it with your mouth and if you feel any resistance then it needs replacing.

Sep 01, 2011 | 1987 Chevrolet S-10 Pickup

1 Answer

1998 1500 will not start unless I pour a little gas in the carb. When I stop the engine after running a while it will not start again unless I pour gas into carb again. Any ideas?

It is your fuel pump or fuel filter. When you turn your key on, you should hear a buzzing sound for a second or two. If you don't hear it, thats what it probably is. If you have a fuel pump relay or fuse, check that first. If the pump kicks on, check the filter. One of these is your solution my friend.

Feb 08, 2011 | 1998 Chevrolet C1500

2 Answers

Ok in order to pour gas in what i called the "carb" i have to take some sort of breather off. i have a 2000 chevy blazer 2wd cyl vortech is it the fuel pump gone bad or could it just be out of...

turn key on and listen for fuel pump in the tank, it should go on for a few seconds then turn off. if you cant hear it try to listen at the fill cap when someone else turns the key on. if you cant hear it , check the safety shutdown relay under hood, it shuts down fuel pump and ignition

Jan 04, 2011 | Chevrolet Blazer Cars & Trucks

3 Answers

My truck used to run... but then i ran it outa gas.... now it wont start but will turn over..... i have a 1991 chevy s-10 blazer 4x4 with 4.3 liter v6.... if i poor gas into the carborater it runs like a...

poss ur fuel pump went bad thats very common on this truck or fuel pump relay i would turn truck on and see if u can hear fuel pump come on u have to take gas cap off

Sep 19, 2010 | 1991 Chevrolet S-10 Blazer

2 Answers

1998 chevy tahoe 4x4 wont start. not getting fuel to throttle body. its not a fuel pump relay i tried it. it will start if i pour gas in the throttle body

fuel pump or fuel pressure regulator. When you turn the key do you hear fuel pump run? If not odds are the pump is bad.

Aug 23, 2010 | 1998 Chevrolet Tahoe

1 Answer

Will not start, do not smell any gas

i had a 2000 chevy venture wbe. i had to replace the in-tank electric fuel pump at 107,000 miles. open the fuel door, remove the gas cap and have someone listen closoly. try to start and if you hear a HUMMING sound once the key is turned, then fuel pump is working. if no hum, the fuel pump is bad. upon start-up it kicks in 2-3 seconds to build up fuel pressure...

Sep 20, 2009 | 2000 Chevrolet Venture

1 Answer

1998 mercury mystique odd starting problem

I i were you i would check the ignition. it sounds like you are only connecting some of the time. And yes it is very normal to hear the fuel pump kick on when you turn the key to the on position.

Jan 08, 2009 | 1998 Mercury Mystique

1 Answer

1998 suburban will not start

you might try changing the fuel filter first..its located just below the drivers door and is like a cannister.also check your catalytic converter.if its clogged it wont let it run on its own.i have a suburban and just went throguh what you are now. my fuel pump wasnt bad but i put in a new one anyway. it cost about 56.00 i think and its in the tank.which is held in place by 2 straps try the filter first and go from there. the converter is hard to check but if you tap it and hear anything moving inside it means its on its way out.when you take the filter off turn the key over to see if you get any gas....if you do then your pump is good if you dont then youll need to replace it

Dec 30, 2008 | 1996 Chevrolet Cavalier

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

88 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts


Level 3 Expert

79024 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

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

Answer questions

Manuals & User Guides