Question about 1999 Chevrolet Blazer

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1999 chevy blazer v6 not the vortec, it doesnt want to start. if i turn on the key the fuel pump primes, sometimes, and when i turn the key off it "primes" too but it doesnt want to start. sometimes it will start, and when it does start it runs fine. and when its warmed up it starts fine.

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  • 693 Answers

Relay trying to go out, Under hood. Good luck. Really this could be multable things.But would start here.

Posted on Mar 26, 2011

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2 Answers

Our fuel pump stopped working on our 98 Chevy Blazer V6 4.3L Vortec Engine, so we bought a new one. A couple days later (before replacing the fuel pump) it started up and ran but ran crappy. So we did


what did you do (replace it) if you still have a miss you may need to tune it up / make sure the fuel pump you bought is for the right psi for your blazer

Mar 27, 2013 | 1998 Chevrolet Blazer

2 Answers

1999 blazer only starts when primed and then wont start after sitting


Black smoke is usually extra fuel, but you say you are priming it to start so that could be why.
Have you checked fuel pump pressure before and after cranking ?

Mar 04, 2013 | 1996 Chevrolet Blazer

1 Answer

I Let my chevy Blazer run out of gas,nw it wont start even though the relay and fuelpump is working.


Is it electric or mechanical pump? Electric is with fuel injection. If its fuel injection, you should hear the pump run when you turn ignition switch. If u don't hear it, try starting, if no, turn off then on. It will self prime. Carburetor is with mechanical pump. I usually put few drops of gas in the carb. Start it, if no, more in carb till it stays running.

Jan 11, 2013 | 1999 Chevrolet Blazer

1 Answer

My wife has ran out of gas several times in our 1999 chevy blazer, nowwhen I try to start it the ingine trys to turn over but it wont start like its not getting gas can you hgive me some suggestions


Possibly burned out the fuel pump. Lay next to the truck with your head by the gas tank. Have your wife turn the key on but not crank the engine. You should hear a light whirring sound of the pump priming and it will last a few seconds and stop. If you don't hear the pump priming, thump the tank near the sending unit as she turn the key. If it runs, you'll need to replace the pump. If it still doesn't run, check the fuse. If the fuse is good and you have a volt meter you can trace the wires to the pump and check for voltage (12) as the key is turned on. If it has voltage, replace the pump.

Oct 14, 2012 | 1999 Chevrolet Blazer

1 Answer

1992 chevy blazer 4.3 vortec engine 2w dr have change the fuel pump fuel filter spark plugs rotor in the distributing cap ignition coil.and still doesnt want to start only cranks but doesnt stay on.


Check the wireing to the pump they had problems with it it tended to over heat and corroad there is a service bulliton on the prroblem #25215705and a kit with new wires and connector to resist over heating Icould give you the kit # but i got a DELPHI pump and the connector dosn;t fit a chevy pump

Nov 23, 2010 | 1994 Chevrolet S-10 Blazer

1 Answer

I have a 95 chevy blazer and at first i was able to prime my gas tank several times then it would start. Now i have to spray starting fluid in it every time i want to leave. I can hear my fuel pump kicking...


The fuel pump may be running but it may not be providing enough fuel pressure. Have the fuel pressure checked at the fuel rail and if it is not to specification, replace the fuel pump.

Jan 04, 2010 | 1995 Chevrolet Blazer

1 Answer

1999 chevy blazer wont start


THE FUEL PUMP IS BAD.

if your losing fuel pressure after the pump runs the drain back valve in the pump has failed.

and i doubt that you are seeing enough fuel pressure to run a vortec engine.

low fuel pressure equals a non running vortec

Apr 11, 2009 | 1999 Chevrolet Blazer

1 Answer

Loosing prime


if you don't have any leaks it is probably the check valve in the fuel pump if you just cycle the key three times by turning key on and wait 7 seconds and turn off and wait 10 seconds each cycle it will start easier if that works and it starts fine the problem is the check valve in the fuel pump

Nov 08, 2008 | 1999 Chevrolet Silverado 1500

1 Answer

2001 chevy blazer not starting


I had this same problem with my 1997 Blazer, which required a fuel pump replacement as Nitrobike said. The sign to look for is when you get in the Blazer, turn your key forward to the accessory position, but not the start position. You should hear the fuel pump charging. It sounds like a hissing or whirring noise for about 2-3 seconds while it pumps fuel into the lines to prime the engine.

Fuel pump replacement isn't cheap, about $700-$1000.

Jun 12, 2008 | 2001 Chevrolet Blazer

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