1998 chevy 4X4 5.7 2500 good fuel pressure but wont stay running

Check the fuel pump. Could be a defective one. If it's OK then check the fuel pressure.

check for correct fuel pressure, if pressure is to low, vehical will not run, even if you have fuel in fuel rail

check your fuel pump pressure, sounds like fuel pump pressure low

That is usually the fuel pump in the tank you to check the fuel pump pressure in all conditions as these are sensitiveJohnny

if its a racing fuel pump than it will have more BUT that will do you no good if you dont have racing fuel injectors, fuel rail, bigger intake manifold, bigger throtle body, and your mapping tuned in with a flashable pcm$$$$$$$$$$$$. stock fuel programing will let it run stock no matter how much pressor your fuel pump puts out. fuel injectors are solenoids that the pcm opens and closes they dont stay open. BUT IT WILL WORK

i have a 98 chevy 1500 5.7 motor,fuel pump is good,oil pressure switch is good, relay, security not tripped,still wont start, no fuel pressure

did you install the oil pressure switch origional to the tahoe? The tahoe uses a low oil pressure shutdown, instead of an inertia switch to shut off the fuel pump in the event of an accident. If the pressure circuit does not close within 3 seconds after the engine starts the fuel pump shuts off. This is in case the truck is on its side or upside down the pump will shut off.

check your entire ignition system especially the ignition control module

without seeing it here is my best answere, do you have the ability to pull codes if the cam and crank sensors are functioning properly ( no codes for them) i would then check the fuel pump fuse and relay . do you have fuel getting to the fuel rail . if u have a guage to check pressure at the fuel rail it should be above 30lbs , if you have no pressure and your fuses and relays are good then you have a pump problem provided you have not been in an accident , i believe that vehicle has a safety shutoff that might be located in the trunk .

check fuel pressure regulator