Blazer 1999 won't start got spark new fuel pump

yes try getting the fuel pump pressure tested by a mechanic. the other thing it can be is the injectors are plugged try running some lucas fuel system cleaner.

1. Ignition Switch: Improperly Connected or Faulty Ignition Switch.
2. Battery: Battery Discharged or Faulty or Coroded, Broken, Shorted or Poorly Connected Battery Cable.
3. Solenoid Switch: Starter Solenoid Switch Faulty.
4. Starter Starter Motor Faulty.
5. Wireset: Worn or Damaged Spark Plug Wires.
6. Coil -Ignition-: Faulty Ignition Coil.
7. Distributor Cap: Loose, Cracked or Worn Distributor Cap.
8. Spark Plug: Incorrectly Gapped or Fouled Spark Plug(s).
9. Distributor Cap and Rotor Kit: Loose, Cracked or Worn Distributor Cap.
10. Carburetor: Worn, Faulty or Damaged Carburetor.
11. Fuel Pump Faulty Fuel Pump.

Sounds like your injectors aren't opening if it holds that pressure. Get a "noid light" at parts store that fits your injector harness connection (just a few bucks). Just pull connector off injector and plug in noid light. When you crank engine, the light should blink rapidly. Try all of them, or at least one on each bank (side).
If light doesn't blink, then check your injector electrical circuit. Power to them is fed through your ignition switch, and the ecm grounds that particular injector at proper time to make injector work.

So, do you hear the pump buzz on, when key is on? If that's good, then check your ignition circuit: check for spark at a plug. Use insulated pliers, hold end of plug wire 1/4 inch form engine bolt or ground source. When cranked, you should see a bright blue spark. Yes? Try another plug wire, too. No? Try another plug wire. If you have NO spark, could be your coil, coil pack, crank position sensor, ignition module. I would recommend using a diagnostic flow-chart to go through the ignition circuit. That way, you are not replacing unecessary parts_Expensive! Of course, if you have spark at plugs, your ignition circuit is good! Then you have to look further, like your injector circuit. Good luck.

what happened the last time it ran

did it run hot or ??

Check the oil - if none -- you could have turned a bearing. In that case, the next would be a compression test.

Best regards
Ck

it could also be the fuel pressure regulator or fuel filter that is in line or mabey the fuel injection relay i no it will not start if that blows well i hope this help please give a good rating that you

That sounds like a fuel pump problem and you can test that by pulling a vacuum line off from the intake manifold and spray a lot of carburetor spray or brake cleaner in a spray can into the intake manifold through the open vacuum line port (it has to say "extremely flammable" on the can to work and the non-flammable will not work for this test) and then replace the vacuum line and see if the engine will start and run for a few seconds on the spray.

If the engine does start and run then the problem will most likely be the fuel pump, however a faulty ignition module inside of the distributor could keep the fuel pump from running or the fuel injectors from firing and if there is good fuel pressure in the fuel rail, (there should be a schrader valve in the fuel rail for testing) and there is spark out to the spark plugs but the engine still will not start, then the ignition module inside of the distributor would be the likely suspect of the problem.

If the engine does not start then you will need to determine why there is no spark to the spark plugs, and most likely the problem will be the ignition coil or the ignition module inside of the distributor, or there could also be a problem with the ECM (Engine Control Module).

check fuel pump quick check spray starter fluid if starts no fuel reaching throttle body if no start or gas is present at throttle body check for spark from distributor to coil pack

You said your getting 65psi for fuel pressure, if that's what your getting for fuel pressure then it's to much the truck is dumping fuel and drowing out the plugs that's why it won't start. Fuel prssure should read 30psi at start then when the motor is started it should still read 30psi until you give if gas then the pressure will go to 40psi being the max.

you have to put a guage on it to find out the pressure it may kick on but not enough pressure