Question about 2004 GMC Yukon
2004 gmc yukon will not start when there is 1/4 tank or less and sits for several hours. after adding several gallons of gas it cranks. today it cut-off for the first time and acts like its out of gas. fuel pump is coming on when switch is turned and purged the lines up front and they seemed to be getting a good flow of gas.
It is not necessarily the flow of gas that is important. You need at least 40 pounds of pressure for the injectors to operate correctly.
Posted on Nov 24, 2017
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Posted on Jan 02, 2017
SOURCE: 95 gmc cranks but wont start
To run it must get gas and spark from the plugs. Since you say it does start when pouring gas down it then it seems spark and plugs is not part of the problem...so...you are back to it not getting gas....so...something is amiss with the gas supply....fuel pump, filter (which you said are good...how do you know that for sure)....or...possibly look at the gas itself......has the vehicle been sitting for a long time with very low level of gas in the tank...if so then water can condense in the tank and you might be pumping water to the engine....so...dump a bottle of stuff in the tank that gets rid of water...available at any gas station or auto supply ... contains methonal...which will absorb the water and allow it to be burned in the engine. Still...I doubt that is the problem but it is cheap ($1 to $2) and will not hurt to try. You might actually be flooding the engine with gas by the way you try to start it. I suggest you let it sit for 30 minutes or so....then retry starting it. Use the procedure of NOT pumping the gas pedal but instead slowly push the pedal to the floor and hold it there not moving you foot and then crank the engine until it starts...but not more than 30 seconds at a time with rests in between of at least a few minutes to prevent starter overheat and damage to it. If you had been flooding the engine then this procedure should clear out the flooding and allow it to start. Also, if, as mentioned, the level of gas in the tank is lmost empty then put a little more gas in the tank. Somehow it seems you may not be getting gas or if you are then it is been flooded and will not start. I hope the procedure helps some.
Posted on Aug 22, 2009
have your evaporative emission control system check.sound like you have purge valve solenoid not working or vent valve control solenoid.have it scan.to see which component not working..reason your gas tank expanding. your fuel vapor building up pressure.your purge valve and vent valve open allowing gas vapor from charcoil canister. to be burn in the intake manifold to be burn in combustion chamber.
Posted on Jun 06, 2009
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