Question about 2000 GMC New Sierra 1500

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WONT START UNLESS I POUR FUEL IN THE THRUTOL BODY TO START IT UP EVRY TIME. RUNS GREAT ,ONCE I START IT UP. WONT TURN OFF, OR STALL.MY FUEL PUMP WORKS,I GET 45 LBS. OF PRESSURE. BUT WONT START IT.UNLESS I ADD FUEL

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To start up a cold engine requires reach mixture (air-gas).In your case it seems like the choke is not working ,so cold engine cannot start.If it is an injection operated system then it must have a temperature sensor which suppose to turn the choking on when cold engine needs to get started.Either the sensor is faulty or the choke or between the two there is a faulty connection somewhere.

Posted on Jul 23, 2009

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96 tahoe . It will not crank up unless I pour gas into the throttle body . Once it cranks it will run untill I shut it off but want crank by itself . Why


First, lets be clear with terms. To crank is to turn the engine over, you can do this manually with a wrench on many vehicles. It requires no spark or air. To turn over or to fire is when you achieve combustion. Example: You could pull the spark plugs on a vehicle and turn the key and it would crank, but it wouldn't fire or turn over.

Now it sounds to me like your vehicle is cranking but not firing unless you pour gas in it. My first thoughts are fuel system. I'm assuming it can't be fuel pump because it runs once it fires. Perhaps the fuel pump isn't priming itself, or perhaps somehow air is getting in the line between the injector and fuel pump? Test the fuel pump first by turning the car from off to on (not starting, just on). You will usually hear a short buzzing noise coming from the engine bay that stops shortly afterwards, that's your fuel pump pressurizing the line. (Pro Tip: If you ever try to take your key from off to straight to start and the vehicle doesn't start on the first try, but does the second time no problem, try delaying at on for a moment before trying to start. This gives your fuel pump time to pressurize the line.) Assuming your fuel pump is charging the line, the next place to look would be at the path the fuel takes to the throttle body. When you crank it over and it doesn't start, are you getting any fuel? If you can't see where the fuel enters the system try smelling the exhaust while cranking without it firing, if it smells of fuel you're good and need to look at air flow and spark, if not it's a fuel issue.

Past that, I'll leave it to someone more experienced than myself, but that would be how I troubleshot my own vehicle.

Oct 17, 2013 | Cars & Trucks

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Truck wont start unless i pour some fuel in throttle body truck quits after dumped fuel burns off


sounds like the fuel pump or filter needs replaced. pull out line off filter underneath and turn key. if fuel comes out slow try replacing filter and trying again. if pressure is still low fuelpump is bad or a blown fuse or bad relay.

Sep 25, 2011 | 1997 Chevrolet K1500

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97 chevy blazer w/ 4.3 won't start unless i pour full directly into it....what is causing this. was driving and it just stalled ...fires but won't turn over completely


if you can put fuel in throttle body and it runs. then it is not getting any fuel. check your fuel pump fuse and the relay, if ok, then you may have a bad fuel pump or a plugged up fuel filter. check filter and fuses first. good-day !!

Jul 18, 2011 | 1997 Chevrolet Blazer

1 Answer

I have a 93 S-10 Tahoe 4WD pickup that wont start. I've changed the fuel filer and i hear the fuel pump working, but it wont start unless I pour gas or starting fluid in the throttle body. it will start...


Check the fuel pressure. Even if it's running it may not be producing pressure. See if you can keep it running on starting fluid or carbuerator cleaner. If so replace the pump.

Nov 23, 2010 | 1993 Chevrolet S-10

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My jimmy runs fine once it starts, but i have got to pour a little gas in the throttle body every time to start it


Fuel Pump. Fuel Pumps in some of the newer GMs cannot have a loss of more than 2-3 PSI otherwise cold start pressure is not there.

Oct 19, 2010 | 2000 GMC Jimmy

1 Answer

It will start with the turn of the key but will turn off immediatly. Then by flooding it with gas directly into mouth it will stay running,I can drive it all over but once I turn it off it will not stay...


Your description indicates that the fuel pump may be too weak to start the vehicle but has enough fuel pressure to maintain running once it is started.

Oct 06, 2010 | Saturn L-Series Cars & Trucks

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1997 GMC Sierra- won't start unless you put fuel in the throttle body, but runs good until you turn it off. You have to use the fuel in the throttle body every time you want to crank it. What's wrong? Any...


Start injectrer deffcctive (unlikely) or out of circit!
But more likely fuel preshure is douwn! check your fuel pump for preshure, once started the engine can live with that for a time I think you will find it is that!
Pleased to be of help.........Bruce

Mar 15, 2010 | 1997 GMC Sierra

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

1 Answer

97 GMC Sonoma


checked fuses , #9 fuse for fuel pump was loose.

Jun 21, 2008 | 1997 GMC Sonoma

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