Question about 1996 Chevrolet Blazer
A typical engine needs mostly just gas and spark to run (besides air of course)
Sounds like the engine is not getting one or the other.
Fuel goes from fuel pump, to filter, to fuel pressure regulator, to fuel rail, to injectors.
You can test for fuel pressure with key on, at the fuel rail. There will be a test port on the rail that you can put a rag on top and push in the valve to see if there is pressure. (or use pressure tester)
If there is no pressure, check that fuel pump relay is working. (you can use an ohmmeter on relay to see if there is resistance). You can also test power to relay and to the pump with a voltmeter to see if pump is getting power. Or turn key to ON position and listen to see if you hear the pump turn on.
If you have no spark to any cylcinders, the crank shaft position sensor may be faulty which is very common in GM vehicles.
You can use an ohmmeter to test the sensor itself.
You can also get a spark plug tester to see if there is spark to each cylinder.
You can also remove one spark plug, plug back into plug wire, lay on top of engine so spark plug diode is 1/4" away from metal surface. Have someone else turn engine over while you look for spark. Do this to each cylinder.
Posted on Nov 16, 2009
check the fuse box under the dash for the computer fuse, its near the bottom of the fuse box,
Posted on Nov 27, 2009
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Posted on Jan 02, 2017
AllData says the fuel pressure should be 60 to 66 psi. Did you ever fix it? What was it? My Blazer is doing the same thing except I noticed that under heavy acceleration my blazer seems to sorta stall like its starving for more fuel. My fuel pressure is 45 to 55psi. I dead headed my pump into the pressure guage and it skyrockets. I changed out the spider injector (used) assembly that also contains my fuel pressure regulator. My symptoms have not changed. I am rechecking my fuel pressure today.
Posted on Oct 13, 2011
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