Question about 1999 Chevrolet Silverado 1500

1 Answer

Changed fuel pump, relay, filter, and gas. does the key complete the circuit some how. fuel pump comes on for 5 seconds but wont stay running

Posted by on

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 5 Answers

Can you remember if your key had a little black square near the grip end of the key? if it did then that is exactly your problem the car's computer system checks for the signal from this chip when the car is started and if not present will cut the ignition power and fuel pump circuit. if you used a screwdriver on the ignition you'll probably need to replace the switch and have a key made at the dealership, altho unless the car is in really good shape it may be cheaper to junk it and get something else...sorry

Posted on Nov 11, 2012

6 Suggested Answers

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

mcgyver468
  • 710 Answers

SOURCE: wont start

fuel pressure should spray pretty far. at least 2ft+. pump may not be delivering enough pressure. have pump replaced

Posted on Apr 22, 2009

  • 1 Answer

SOURCE: Truck won't stay running. Changed the fuel pump,filter, and relay.

have your battery and alternator checked, more than likely its one of those

Posted on Jun 20, 2009

dennymulford
  • 1055 Answers

SOURCE: fuel pump

yes thats normal the prob is the fuel pressure regulator

Posted on Aug 12, 2009

  • 3600 Answers

SOURCE: 90 chevy k1500 350 tbi fuel problem starts but wont stay running

try bypassing the oil pressure switch on the back of the block behind the distributor, if there oil pressure switch goes bad it will do this. had one that drove me nuts trying to fix it then figured out I had to buy a book and low and behold thee it was 3 wire oil pressure switch you can't see between the engine and fire wall just behind the distributor and costs 8 bucks to buy new.

Posted on Jan 16, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

2 Answers

1994. Why won't it start?


If the fuel pump/s continue to run with key on, suspect a relay issue. The relay is grounded by the vehicles computer. If the computer supplies a constant ground, the relay will continue to stay closed and power the fuel pumps constantly. If the the ground wire that comes from the computer to the relay is shorted/grounded, the relay will stay energized as well. As for the no start, are the injectors getting a power and ground supply? The ground side of the injector is controlled by the computer as well. Is the vehicle getting spark at the coil/plug? Have you scanned the computer for any trouble codes?

Nov 29, 2015 | Ford F-150 Cars & Trucks

1 Answer

Put on new fuel pump got pressuer but want stay cranked


Your post is lacking any detail. However, if you are stating that the engine starts after being cranked but dies out (wont stay running) there are 2 ways the fuel pump is activated. When the key is first turned on, there is a 5 second fuel pump run (the ECM energizes the fuel pump relay). After the engine starts, the fuel pump relay will only stay energized when the oil pressure switch closes keeping the fuel pump relay on (oil pressure is above 5-7 psi). If the oil pressure switch is faulty or there is no oil pressure, the engine will stall just after starting.

Apr 10, 2014 | 1999 Chevrolet Astro

1 Answer

1999 saab cranks wont start


Disconnect your fuel filter and turn the key on. If it shoots gas several feet away, then the start cycle on the fuel pump is probably good. if not, then get a new fuel pump. If it's good, then the problem will be in your fuel regulator, or injectors.

Jun 12, 2012 | 1999 Saab 9-3

3 Answers

99 yukon 180,000 mi. doesn't start. cranks forever, but won't start. Should I be able to hear the fuel pump when I turn on the key?


yes you should be able to hear the fuel pump run for about 5 seconds once the key is turned to the on pos. check to make sure you have spark. if you do try having someone spray air intake or carb cleaner into intake manifold while you crank. If the truck starts right up for a second (or stays running as you keep spraying) Id say you have a bad fuel pump and id change the sending unit also. (First check the fuel pump fuse and fuel pump relay) GMC and Chevy are nororiously known for having bad fuel pump/sending unit problems. I have prob changed over 60 myself.

Nov 30, 2009 | 1999 GMC Yukon

2 Answers

Why doesn't my new fuel pump (and new relay)come on? I am getting 8 to 9 volts of power to the end of the harness. I am hearing a slight clich when the key gets turned on.


there may be a problem whit your ecm (computer) or a bad contact on a fuse or the relay
the power your are getting from those wires my be the power for the fuel level sensor
when your turn the key on the run position you should have power for only 5 seconds
that is the computer activating the relay then it wont give power on till you crank the truck.
check for power on the relay contacts
you should have constant power on one terminal and you sud have power on another one for only 5 seconds when you turn the key.

Note is a good idea to change your fuel filter wile you are at it
if you have a clog fuel filter can cause your fuel pump to go bad.

Jul 14, 2009 | 1998 Chevrolet S-10 Pickup

2 Answers

2001 checy Tahoe wont stay running for more then 10 seconds?


hi i have a 1997 chevy tahoe that starts but won't stay running i have changed fuel pump, fuel filter,relay ,spark plugs, and just changed rotor and dis. cap ready need some help to figure this out please.

Jan 31, 2009 | 2001 Chevrolet Tahoe

1 Answer

I have a 95 Maxima I changed the fuel injectors and now the car wont start.  so i put the old injectors back and it still wont turn over,  It stay on for about 2 sec can anyone help me


I assume you bled off fuel pressure before you installed the injectors. Try this to pressurize the fuel system. Turn the key to "on" position and wait 5 seconds. AT same time, listen carefully for a buzz sound that means the fuel pump is running to pressurize the system. It will shut off after 5 seconds. Then, turn off the key and wait 30 seconds for the computer power relay to shut off. Then, turn the key to "on" again. Thsi will run the fuel pump for another 5 seconds. Repeat 5 times. Fuel system should be pressurized now.
If it doesn't start now, you may have done something while you were changing the injector. good luck

Jan 09, 2009 | 1987 Ford Tempo

1 Answer

Starts up and dies


Let me explain real quick the fuel pump circuit, when you crank to start that is a straight circuit to the pump via a fuse in most cases, when the engine starts and you release the key the fuel pump relay is energized and keeps the fuel pump running, it sounds like the fuel pump run relay may be the problem with your car, replace it or bypass it to test, if you don't understand how a bosch relay is wired don't jump it yourself, you can burn up the wiring.

Nov 05, 2008 | 1992 Mazda MX-3

1 Answer

1996 tahoe wont start


There should be a 2 second prime by the fuel pump. This prime by the fuel pump is standard for GM vehicles, and if it is not present a hard start is encountered. Turn the ignition to the run position and listen for the fuel pump operation. You may have to have an assistant listen at the fuel filler by installing a long slender funnel into the fuel inlet to the tank, remove the gas cap and insert the funnel, listen at the large end of the funnel to see if the pump can be heard running. Using the funnel acts like a megaphone and makes it easier to hear the pump. If the pump runs for 2 seconds after you turn the key to the run position (DO NOT attempt to start the engine during this test) and the engine doesn't start due to lack of fuel, check for an obstructed fuel filter. (Just change it, it's probably overdue for service anyway since everyone thinks it get changed during oil changes, but never really does.) If the pump doesn't run during prime interval, the computer may not be turning on the fuel pump relay, or the relay is defective. To check the relay, use another of the relays in the power distribution box to substitute for the suspect fuel pump relay and retest. Be sure to wait at least 30 seconds between key cycles since some systems have a delay timer built in to keep the pump from over running. Be sure the relay you sub into the fuel pump socket is identical to the one you remove and properly oriented in the socket. The engine will run following your manual prime because an additional set of contacts in the oil pressure switch will power up the fuel pump relay once proper oil pressure is achieved by an idling engine. If you find that the relay is not defective, but doesn't provide a priming impulse, the engine computer may have failed. DO NOT use a conventional test light with a filament type bulb to check any of the computer circuits that drive the fuel pump relay, or any other computer controlled circuits on an automobile ( or pickup) The driver circuits in a vehicle computer can be blow-out by over-current when using a conventional test light. You can use a high-impedance DVOM for testing safely.

Nov 01, 2008 | Chevrolet Tahoe Cars & Trucks

3 Answers

Starts but wont stay running


In reply: if its not the maf there are 2 relays in the relay box i belive its underhood, 1 primes the fuelline to 32psi the second kicks in after it starts, and keeps it running and varies the psi. if the primer relay isnt kicking in then it wont start due to no fuel

THX

Don :)

Jul 26, 2008 | 1991 Chevrolet Camaro

Not finding what you are looking for?
1999 Chevrolet Silverado 1500 Logo

Related Topics:

37 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

75051 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22095 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7726 Answers

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

Answer questions

Manuals & User Guides

Loading...