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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
Try replacing the fuel filter, but it sounds like you have a weak fuel pump. Your cold start pressure should be 62-65 psi and drop about 5 psi when the engine is running. Anything less then 62 psi is going to cause you to have starting issues, you can also test your fuel pump by blocking off the return line to see if you get 75-78 PSI. this is just a test to see if your fuel pump is still good. If you have less then that with the return line blocked off, replace your fuel pump but check your ground wire first. The ground wire is separate from the wire harness and grounded to the frame and a bad ground will give you a weak pump.
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Posted on Mar 20, 2010
yes tbi and vortec are compatible only thing changing is the intake gaskets make sure to order the gaskets according to the intake you are using i hope i was helpful please let me know if you have further questions and i'll be glad to assist you.
Posted on Mar 06, 2011
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