My 1999 gmc jimmy will not start unless i use starting fluid

Is your fuel pump relay getting a signal? Is it any good. I would start by figuring out why the pump isn't running

1999 jimmy doesn't have a carb. has fuel injection . From what you have typed here i would suggest you take your vehicle to a qualified repair shop !

Unbolt the master cylinder and see if it is leaking into the booster.

Spray some starting fluid, (ether), directly into the throttle body. Does it start with that?

i have a 1994 gmc jimmy 4.3l cpi. i could not pass the emission test.hard to start, spuddered, and smell of gas was strong. long story short, i replaced my spider injectors, good to go. $278 brand new from auto zone.

These trucks are known for fuelpump problems. the first thing to check is to see if its got fuel pressure, try sparying starting fluid into throtlbody and see if it starts and runs for a few seconds, if it starts then you will know its a fuel problem, it will die out once the starting fluid is burnt up but at least it will tell you its a fuel problem and if it does start i would bet its the pump. good day.

The first thing i would do is have the computer scanned for codes and see what codes are stored, you may have a bad fuelpump or a control module problem, check for fuel and spark, spray starting fluid into throtle and see if it starts if it does then you know its a fuel problem.

check the fuel pump, are you getting fuel preasure to the injectors, you may need a gauge to test this,or if you spary the throttle body will it start if it does then i would say its the feulpump, start there first.

check your stater wires

My friend had the same type of symptoms, there is a spider wed style od hoses under the intake that delivers fuel to all the cylinders that he found to have hairline cracks in it. Found out this is a know problem especially in the 4.3L Vortex