hey guys i need some help. my mom has a 97 blazer 4.3 4x4 4 door with about 180000 miles on it and its not starting. the fuel pump was changed a couple years ago tested the pressure on the fuel system and its good it has spark if you crank it for about 5 minutes it was starting now it wont even if you pour gas right into the throttle it doesnt fire right up when it would start it sputter a little but then run fine and it doesnt have any codes. any ideas what it might be

 

You said you verified the fuel pressure (should be higher than 55psi with the key on, engine off), but it is not clear if you tested leak down (should remain above 50psi at least 10 minutes after the pump shuts off).

Have you checked for spark? Verified timing?

 

pour some gas in the throttle body.
if it starts then change the filter if nothing then a new fuel pump is needed.

sorry nothing lasts forever anymore.

hope this helps

 

i did check the pressure when you turn the key it jumps to 60 for a second and stays between 50 and 60 for about 15-20 minutes it does have spark. pouring gas in it sometimes it starts were going to change the filter and check the connection for the injector thanks for all the help

 

If force feeding it fuel down its throat doesnt help it probably isnt a fuel issue. I bought a blazer for $500 buck that wouldnt start. When you cranked it it would buck and fart and spew flames and blew the muffler wide open. It was just in need of a good tune up. The distributor cap and rotor were the original at 225000 miles. It was cross firing. I drove it down the road the same day i bought it. Look at the obvios stuff and keep an open mind. Start with basics.

Good luck!