93 chevy s10 4.3L V.I.N z

Check and verify the pickup low pressure fuel pump inside the fuel tank is working, it will run anytime the key is in the crank position or the engine is running, should make a low pitched whirring noise, best heard with the fuel fill cap removed and ear down to the fill tube..

OK, when you turn the key to on, it will start the pump for about 2 seconds-this is just to put pressure in the lines and in the fuel rail for easy starting. If key is not turned to start, pump will shut off after 2 seconds. But when cranking in start, and when engine is running, the pump is on full time.
If your pump runs longer than 2 seconds with key only in on position, you have a fuel circuit problem. It very well could be a bad fuel pump relay staying on. Or it could be a computer problem signaling the relay to stay on longer. Try a new fuel pump relay first and see if that was the problem.

1989 Chevy blazer 4.3 won't start..I have ... - CarGurus

www.cargurus.com > Questions > Chevrolet > BlazerCarGurusJan 30, 2013 - 96 Chevy S10 Blazer with 4.3 L engine vortex will turn over but won'tstart. ... i a 93 k5 blazer 5.7tbi in cold weather it will not start, if i hook jumper ... was told it just needed a Fuel pump, I replaced the Fuel pump, and the Filter, ...

Try this info:

do you hear the fuel pump running when you turn the key. and do you have spark

chk in line fuel filter for obstruction, also could be a lot of sediment in the tank clogging up the filter. Hope this helps you resolve your problem.

fuel pump will only run for a couple seconds when you turn the key on but should run all the time when you crank the motor over then you should see fuel come out

some models dont run when the key is turned on,but when the engine cranks the fuel pump starts running,

The plug on the fuel pumps are common for being bad and burning up the pumps. But the new pump will come with a new plug.

you have answered you own question bruv change remove the fuel pump and inspect