If you have the central injection system, you regulator is inside the plenum, next to the spider assembly. Takes about 20 minutes to get to it.
It doesn't have a vacuum line attached to the fuel pressure regulator.
41-47 psi, engine off, fuel pump running.
on the top of the intake manifold next to the main injector
The water pump on a Chevy Blazer 4.3l is on the front of the engine. The Fan and fan shroud will have to be removed to gain access.
Under the upper intake manifold, attached to the bank of injector poppets, aka "the spider".
Vortex engine? Got me. I thought Vortex was just a brand of supercharger. I believe you mean Vortec engine.. GM also called this the L31 (they use 3 letter/number codes for everything) This system used a SCPI (Sequential Central Port Injection) system... and the fuel pressure regulator is on the central unit, which is INSIDE the intake manifold- you have to remove the upper intake manifold to get at it (plastic part), and the Fuel pressure regulator will be on one side of the central unit where all the fuel lines go to, it has a tube on it open to the intake manifold (to read intake vacuum)
YEah
The oil pressure sensor on a 5.7 GMC vortex engine is located next to the distributor. This will be towards the back of the engine block on the right hand side.
Bad fel pump, or bad fuel return valve
It is located on the back of the block at the top near the distributor.
The Vortec Motor hasn't changed sence it came out. it will fit perfectly.
what ideal pressure oil for engine 5.7 v8 vortex