Maybe fuel pump or filter
SOURCE: 2003 Chevy Blazer won't start
have the computer checked out. may need reprogramming and have updates added. also check for loose or corroded connections at the terminals.
SOURCE: 2000 Chevy Venture Fuel Pressure Regulator
use the pressure test port on the top of the engine, it is on the fuel rail that supplies fuel to the injectors, looks like a tire valve, will have a plastic cap on it.
SOURCE: fuel pressure regulator had no vacuum line connected
another engineers wet dream. think of it this way . what is normally in the intake when the engine is running.. answer vacume, hence the regulator gets its vacume without a hose connected to it as its already in a full time vacume chamber.no hose required . ps be carefull to seat the regulator and o rings securely into the housing befor you reattach the secureing metal clip.
good luck chris
SOURCE: 1997 astro 4.3 vortec v6 fuel pressure problem.
have you made shure there is fuel in the tank, they had alot of problems wth sending units on that year. if so chances are its the fuel pump. try banging on the bottom of the fuel tank while sombody tries to start the vehicle, if it starts replace fuel pump. faulty regulators will usually cause a very rich running condition.
SOURCE: how do i install a fuel pressure regulator on a
You will need a torx bit, either a t35 or a t40 I believe. You will also need a 1" or a 1 1/16"
The pressure regulator can be removed without removing the throttle body but you would need to have some experience replacing them to figure it out.
First remove the throttle body from the intake plenum. Using the 1 inch wrench loosen the nut that holds the fuel line to the lower part of the fuel pressure emulator. Use the torx bit to remove the bolt that holds the regulator to the fuel rail. Place a rag around the regulator to catch and fuel that may spray and pull the reegulator out of the fuel rail then pull up on the regulator to remove to from the fuel line.
If you have a 3.8 Liter than all you will need is a snap ring plier. Remove the plastic cover from the top of the engine, remove the snap ring that holds the regulator in place. Pull out the regulator. Be prepared for fuel to spray or spill. Make sure all the parts come out with the old regulator. Compare the old and new one to make sure they look identical. The screen and small oreng like to stick in the fuel rail.
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