Question about 1991 Chevrolet S-10 Blazer

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1991 CHEVY S10 4.3 ENGINE WANT IDLE OR STAY RUNNING WHAT CAN I TRY ?SEEMED LIKE I WAS OUT OF GAS PUT MORE IN DIDNT HELP CHANGED FUEL FILTER ,MAP CENSER, DIST CAP ROTOR BUTTON,VACUME LINES, OXYGEN WHAT NEXT?

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Egr valve stuck open at idle

Posted on Oct 09, 2009

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We have the same problem mines 94. we have a spider injecter that went bad..300 part cheap at junk yard. we changed fuel filter,fuel pump,spark plugs / wires we were getting fuel all the way to the injecter but not going in.

Posted on Oct 16, 2009

  • terry phillips Apr 18, 2013

    i have same car and problem

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1990 chevy silverado 1500 wont run


Code 12 means you are in test mode, code 34 is a problem with the map sensor, and code 35 is a problem with the idle control valve.
But those two codes could show up if you disconnect those sensors or if the engine is having other problems.
In situations where the engine stalls, it is very easy to overlook something or assume a component is working.
Treat it like a no start. Pull a plug wire and watch the spark as the engine dies. Use carb cleaner or starting fluid to boost fuel supply.
You'll have to figure out if it is loosing spark or fuel to proceed.
Things like the coil, the stator in the bottom of the dist, or a relay can be the cause. Even low fuel pressure.

Sep 17, 2012 | Chevrolet 1500 Cars & Trucks

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91 Lumina won't stay running; see lots of same question for same car but no problem solvers....Please help.


On electronic fuel injection pumping an pumping an pumping the gas pedal does nothing without the engine running ! Pushing the gas pedal to the floor will cause the PCM - engine computer to go into clear flood mode .

You have some very interesting ideas here , but not really how it works or is !

The vehicle will go into closed loop fuel control when the engine coolant temp reaches a definded temp an the O2 sensor get hot.

She would run for a couple minutes and die which is open loop when running, closed loop is when the sensors kick and it would die. Pulled spark plugs, they were black meaning no spark. Can only be 2

Black spark plugs indecate a rich condition , over fueled , wet spark plugs indecate no spark .

Mar 07, 2017 | 1991 Chevrolet Lumina

1 Answer

I have a 2000 mustang that will not stay running,,, it was running fine, i parked it for two months in the cold and didnt start it up, when i did... it wont run if u give it gas however it will set and...


I would run the fuel pump for a little while with the fuel line disconnected from the engine into a gas can . Although you might have changed everything you might still have residual water in lines or motor. I would still put dry gas in the tank

Jan 31, 2011 | 2000 Ford Mustang

3 Answers

Jeep cherokee limited starts and then dies a few seconds after. I have changed the fuel filter, distributor cap and roter, spark plug wires, battery, cleaned the idol controll sensor.. I hear the fuel pump...


If it will start right back up and if you hold gas pedal will truck stay running ? if it will stay running when you hold the gas then replace the idle air control valve it is bad and cleaning it didnt help. but if it wont stay running even if you hold the gas pedal then the first thing is to make sure you are not loosing fuel presure

Jan 12, 2011 | 1991 Jeep Cherokee Limited

1 Answer

1991 302 runs like it is chocking out, I have changed the fuel filter, plugs wires rotor cap, and map censor, runs rough and worse when in gear, eating gas..help please? The truck is a 1991 f150 NITE 4x4


is it idling high and you put it i gear it runs rougher and smoke black check your coolant sensor also connection or sensor itself and fuel pressure if high check for return line blockage also vacuum leaks make sure you have the right vacuum going to your map sensor you need to check right vaccum at idle going to your map sensor/

Jan 19, 2010 | 1991 Ford F150

3 Answers

1995 Chevy K1500 4.3L V6. Engine has inconsistant idle


Have you changed the fuel pump yet?I had the same exact problem.I replaced my fuel pump with an AUTOZONE PIECE OF JUNK fuel pump.That pump lasted almost 2 days.The second day i had it the truck didnt want to start but it did and it ran like ****,and when i put it in gear it ran as long as I didnt touch that gas pedal.You could go get a fuel pressure test or just replace it,your call.You might want to check your filter too but im sure its the pump.Good luck

Apr 13, 2009 | 1997 Chevrolet K1500

4 Answers

My 1993 chevy 1500 Silverado truck suddenly quits


I put a new fuel pump, fuel filter, and a fuel pump relay and the fuel pump is still not coming on. I am not getting any fuel. Can you please tell me what it might be.

Mar 08, 2009 | 1993 Chevrolet C1500

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