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please go to this site, it sounds like you have a bad fuel pressure regulator.--- http://www.doityourself.com/stry/7-symptoms-of-a-bad-fuel-pressure-regulator Good-Day! But make sure there is no fuel leaks anywhere under car, this is dangerous to have a fuel leak. Good-Day!
02 sensors are located in the exhaust the upstream ones are close to the engine in the rear exhaust manifold (for 6 cylinders) and at the front exhaust (for 4 cylinder). The downstream ones are behind the catalytic converter. Check to make sure the fuel pressure regulator on the to of the engine isn't leaking. Replace the air and fuel filter could be plugged. Check the coolant level in both the rad and the reservoir they are notorious for intake manifold and head gasket leaks for 6 cylinders. There aren't many calibration updates for this vehicle relating to fuel consumption.
check the fuel filter some where on fuel filter there should be a arrow or a in or out labled on it if has arrow arrow should point to front of car if has in or out IN should be tank side of filter if that checks out ok check for a fuel leak possible places for fuel leak would be fuel filter connections connections to tank or if lines are rusty they could be leaking my best guess is you got a fuel leak somewhere
hi, normally the FUEL PUMP, FUEL FILTER , FUEL REGULATOR at the back under the car near the front of the FUEL TANK. the FUEL FILTER HAS A ARROW and must go FROM THE TANK TO THE ENGINE. if you put it the WRONG WAY AROUND the car will NOT RUN PROPERLY. THE FUEL REGULATOR HAS A SPRING LOADED VALVE AND RETURN PIPE to the tank. THE FUEL PUMP HAS A ARROW TOO. from the tank to the engine. gerry
If you noted the direction arrow on the fuel filter when you installed it and the arrow points toward the front of the vehicle, then the fuel pump will automatically bleed the air and deliver fuel to the motor. Just hold the pedal to the floor and try starting the car five or six times with the pedal all the way down. If it was just a bad or dirty fuel filter that was starving the engine that should work. If the engine was not starting before the fuel filter was replaced, you could have a defective fuel regulator leaking fuel or you may have a bad idle air control valve motor. When these fail you can smack it hard with a handle from a screwdriver or remove it and clean it and put it back in to "temporarily" get it working again. That will usually work for a few months anyway. The other possiblity is you have an air leak between the air filter box and the motor. Any leaks in the hoses between those locations can make a modern vehicle very hard to stop and will run a battery down pretty quick.
For 2000 Chevrolet Truck Blazer
4WD 4.3L SFI 6cyl If your engine is a 4.3L V-6 with CPI (central point injection) it is
inside the upper intake manifold. The upper intake manifold is bolted on
top of the normal intake manifold.
The throttle body is mounted on
it and your fuel lines terminate into the center of this.
Removal & Installation
Relieve the fuel system pressure.
Remove the air cleaner outlet resonator.
Disconnect the engine wiring harness from the retaining clips at
the front of the engine.
Disconnect the fuel pressure regulator vacuum line.
Clean any dirt from the fuel pressure regulator and the
Disconnect the fuel return pipe.
Remove the fuel return pipe retainer.
Remove the fuel pressure regulator retainer.
Remove the fuel pressure regulator.
Inspect the regulator filter screen for contamination. If
contaminated, replace the fuel pressure regulator.
Fig. Fuel pressure regulator-4.2L engine
Install the regulator filter.
Install the new O-ring on the fuel pressure regulator.
Lubricate the fuel pressure regulator O-ring with clean engine
Push the fuel pressure regulator into the regulator housing on the
Install the fuel pressure regulator retainer. Tighten the
regulator retainer screw to 71 inch lbs. (8 Nm).
Install the fuel return pipe retainer. Tighten the return pipe
retainer screw to 71 inch lbs. (8 Nm).
Connect the fuel return pipe.
Connect the fuel pressure regulator vacuum line.
Connect the negative battery cable.
Inspect for leaks:
Turn ON the ignition for 2 seconds.
Turn OFF the ignition for 10 seconds.
Turn ON the ignition.
Inspect for fuel leaks.
Install the engine wiring harness into the retaining clips at the
front of the engine.
I'm guessing it's an older points and condenser type motor. If so, it sounds like the condenser is heating up and killing it. Then when it cools off it will restart. If it has a condenser replace it and see.