Alright, really need help with this. Blazer has been sitting roughly a year and decided to get it running again. Charged up the battery and attempted to start, it’ll crank but wont start.

Last time it ran we had some problems where they recommended a fuel pump so that was the first move here. New pump installed but still no start.

I cycled the key several times and heard the pump relay click twice each time so good there but i did not hear the pump prime.

I rechecked the connections at the pump and they were good there too.

Any ideas where to go next?

 

On my phone now so don't know the link, but there should be a sticky thread on crank/no-start conditions.

What I remember of the instructions, one the first things to test is the fuel pressure and if it holds.

 

If you did not hear pump run, before checking pressure might start with checking to be sure you have voltage at fuel pump . The two larger wires connected to pump should have 12v when relay clicks or right when key turn on or off. Check fuses too ECM B or ECM I I think are fuel pump module fuse. Can also jumper pins 30 & 87 in relay socket ( diagonal located ) and pump should run with key on . But do not jumper 85&86 it’s the coil and will short out ECM !

 

cant ya just run 12 volts to the test terminal in the fuse box under the hoodf?.........i wouldnt know anything about jumper pins and all that...maybe the 03 is different than my 2001

 

The proper way to do this is to test your fuel pressure leak down at the shrader with a fuel pressure gauge per the sticky. If you dont pass this test then we go looking for the reason. After fuel pressure is confirmed and you know that the fuel is not varnish then we move onto ignition and spark.

George