Question about 1991 Chevrolet S-10 Blazer

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Turns off after the first minute

My blazer 91 tries to run but it seems like if it didnt have gas in the tank. so im assuming it could be the gas pump or the injectors i need help to find out what it is.

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  • Contributor
  • 30 Answers

You try filter down underneath in frame rail ?

Posted on Jan 03, 2014

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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PyroPCMan
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SOURCE: how to change a fuel pump in a 2000 chevy blazer

Good Day,

I am assuming that you have the 4.3L V6.

The fuel pump is always a pain on trucks becasue you have to remove the tank to gain access. The pump is bolted in on the top side of the tank. I hope it doesn't have a full tank of gas as it needs to be drained(re-use when job is complete). Not to mention pulling a tank that's full of gas very heavy.
See this link for an overview:

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a13e9

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a145a

Here's how you test the fuel pump relay, and fuel pump:

  1. Turn the ignition OFF.
  2. Remove the relay.
  3. Locate the two terminals on the relay, which are connected to the coil windings. Check the relay coil for continuity. Connect the common meter lead to terminal 85 and positive meter lead to terminal 86. There should be continuity. If not, replace the relay.
Fuel Pump
  1. Turn the ignition key OFF for ten seconds.
  2. Turn the ignition key to the ON position but do not start the engine.
  3. You should here the fuel pump operate for two seconds (a light electrical humming sound).
  4. Apply a 12 volt fused jumper wire to the fuel pump prime (test) connector. This should be located in the driver's side of the engine compartment. The fuel pump should operate.
  5. If the fuel pump does operate, remove and test the relay. If the relay is defective, replace the relay and repeat the test.
  6. If the relay is operating properly, connect a grounded test light to the fuel pump relay control wire (green with white stripe) at the relay. Turn the ignition switch to the ON position. The test light should illuminate for two seconds and go out. If the test light does not illuminate, check the relay control wire for continuity and repair as necessary, then repeat the test.
  7. Connect a grounded test light to the feed wire (orange) at the relay and turn the ignition key ON. The test light should illuminate. If the light does not illuminate, test feed wire for continuity and the fuse in the underhood fuse relay center. Repair as necessary and repeat the test.
  8. If the fuel pump is still not functioning, connect a fused jumper wire between the feed (orange) wire and the fuel pump motor (gray) wire at the relay. The pump should operate.
  9. If the pump does not operate, check the fuel pump motor wire for continuity and repair as necessary.
  10. If the pump will still not operate, replace the pump.
  11. If the pump does operate, start the vehicle and remove the relay. The vehicle should continue to run. If the vehicle stalls, check the fuel pump/oil pressure switch and its wiring. Repair as necessary and repeat the test.
Also see figure 4 which is digram 3 from this link, this is the schematic on the fuel pump, the fuel pump's hot wire is tan with a white stripe, if you can test the voltage of this wire you can confirm it is not an electrical problem.

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c1528008f3ce

Also be sure to releive the fuel pressure before servicing

http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a1468


  1. Disconnect the negative battery cable.
  2. Loosen the fuel filler cap to relieve fuel tank pressure.
  3. Connect fuel pressure gauge J-34730-1A or its equivalent to the pressure connection. Wrap a shop towel around the fitting while connecting the gauge to prevent spillage.
  4. Install the bleed hose into an approved container and open the valve to bleed the system. The system is now safe for servicing.
  5. Drain any fuel remaining in the gauge into an approved container.
Let me know if any of this is jibberish to you and I can clarify further.

Good Luck again, and feel free to ask anymore questions.

Posted on Jul 03, 2008

  • 124 Answers

SOURCE: 2002 chevy blazer fuel pump (4 door)

yes you have to drop the tank. you will also need a fuel line tool to unhook the fuel lines. before you drop the tank see if tou can reach and wiggle the electrical connection on the top of the tank. these pumps have a pigtail issue. please rate

Posted on Dec 08, 2008

  • 2 Answers

SOURCE: 2001 chevy blazer won't start

have you tried cleaning your fuel injectors? There is a cleaner that you put into the vaccum line that comes from the brake booster to the intake (so it feeds all the injectors all at once) it is called SeaFoam it runs about $8.50 a can. The directions are on the can.

Posted on Dec 11, 2008

Molson02536
  • 3854 Answers

SOURCE: 91 chevy blazer 4.3 won't start after running.

Check the ECM for Codes to help you find out what's causing  the problem. Here is a simple and easy way to check.
On board diagnostic (OBD) was designed on vehicles equipped with electronic fuel injection so you can generally retrieve the codes yourself. No need buying a scanner or running to any parts stores to check the Check Engine. This system is called obd1 and applies to most vehicles made before 1995 for domestics and 1993 on imports. In this article, I will discuss the methods used by domestic vehicle manufacturers on how to check the engine lights in their cars and Trucks.

For GM domestic vehicles made before 1995, the diagnostic connector is located under the dash panel by the driver side. To get the check Engine codes to flash in your dash panel, use a jumper wire or a paper clip and connect terminals A and B of the diagnostic connector. Turn your ignition key on with engine off and the codes should start to blink. All codes should start with code 12 which is one long flash followed by 2 short flashes. This code 12 means the diagnostic system is normal and will repeat itself continuously if there are no trouble codes. Otherwise, code 12 will flash 3 times before flashing the fault codes.

Counting the codes being flashed is easiest way to trouble shot problems in domestic vehicles and most of the codes can be erased or cleared by disconnecting the battery negative terminal for 1 minute and reconnect. Just make sure to check your service manual in case you have electronic equipment such as radio or clock that needs reprogramming in which battery disconnection is not recommended. Finally after performing repairs on the culprit code, always go for a road test to confirm if the problem is fixed.


Here is a link with the GM codes. http://chevythunder.com/199295_lt1_trouble_codes.htm
Good luck and hope this helps

Posted on May 02, 2009

co7196
  • 3433 Answers

SOURCE: tied to solve problem why 1996 chevy Blazer won't start

They should be on seperate circuits. Tyour key on and ck to see if you have any fuel flow. Fuel pumps in tanks do **** out. chk to see if you have any fuel flow by loosening a fluel line. No fuel, no pump. good luck

Posted on May 17, 2009

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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

1 Answer

2000 Blazer Will not stay running


Wow, you seemed to have changed what I would have recommended to someone in your shoes.

If the fuel pump relay is hot, I think that there could be a crossed wire somewhere.

I would take it to an auto electric shop to diagnose problem if it's worth putting more money into it.

Jul 05, 2010 | 2000 Chevrolet Blazer

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Ran out of gas. Put gas in it started right up then after a few minuts it shut off. Put gas in carb it runs till gas is used up. Where is fuel filter and is the fule pump in gas tank?


Fuel filter is located on the inside frame rail under the drivers door and the fuel filter is located in the gas tank. Start with the simple and change the fuel filter first, but it is common for the fuel pump to burn out when the gas tank has run out of fuel, but since your engine started back up. Good chance that your fuel pump may still be good and your fuel filter may have pick up dirty from the bottom of the gas tank which is causing your engine not to get any fuel.
Thank you for using fixya and good luck

May 03, 2010 | 1991 Chevrolet S-10 Blazer

1 Answer

Fuel problem on a 91 sonoma 4.3


DID YOU CHECK THE FUEL PUMP FUSE AND RELAY.AND THE FUEL INJECTOR FUSE.SOUNDS LIKE FUEL PUMP NOT WORKING.YOU ARE NOT GETTING FUEL TO THE LINE.NOW IF FUEL PUMP IS RUNNING.THEN THE LINE COULD BE PLUGGED.

Sep 19, 2009 | 1991 Chevrolet S-10 Blazer

2 Answers

1997 CHEVY BLAZER SHUTS OFF WHEN DRIVING


Sounds like water/debris in the gas tank. Try adding dry gas to the tank. Changing the fuel filter also a good idea.

Jun 19, 2009 | 1997 Chevrolet Blazer

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There should be 2 or 3 wires into your tank.

When you first turn the key to the on position, but not all the way to the start position, do you hear the pump run at all?

If not, look in the under hood power distribution box for a relay marked fuel pump. check if there is power there. if yes, check to see that power comes from the relay when activated.

If all is ok there, remove the fuel tank from the vehicle and replace the fuel pump.

Apr 18, 2009 | 1991 Chevrolet S-10 Blazer

3 Answers

2000 Chevy Blazer Wont Start


The plug on the fuel pumps are common for being bad and burning up the pumps. But the new pump will come with a new plug.

Mar 18, 2009 | 2000 Chevrolet Blazer

1 Answer

1992 jimmy blazer


You could have gotten bad gas in your tank. Did you try dry gas at all? Also, bad gas can leave alot of sediment at the bottom of your tank, waiting for the right movement to get moving into your system. A new filter would only get quickly clogged again. I had this happen- got gas from a station after a flood- fuel tank had to be dropped and cleaned out.

Feb 26, 2009 | 1995 Jeep Cherokee 2 Door

2 Answers

Wont run


Try checking those sparks again. It could be a weak spark not enough to start your engine.
Make sure also that you have fresh gasoline, as gasoline or diesel looses it's effectiveness after a long time.

Nov 20, 2008 | 1988 Chevrolet Blazer

1 Answer

Adding gas


gas pumps turn off when they sense flow re-entering the nozzle. Try adjusting how far you are shoving the pump nozzle into the vehicle. or don't squeeze the pump too hard (the excess velocity creates turbulence which creates back-splash and triggers the sensor).

Sep 09, 2008 | 2001 Chevrolet Blazer

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