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Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose), GMC Technician
Category: GM
Satisfied Customers: 47955
Experience:  16 years of experience
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2001 GMC: A 5.3 LITER ENGINE.I JUST REPLACE THE ENGINE WITH ANOTHER 5

Customer Question

I HAVE A 2001 GMC 1500 WITH A 5.3 LITER ENGINE.
I JUST REPLACE THE ENGINE WITH ANOTHER 5.3 L, I CHANGE IT BECAUSE THE MILEGE WAS 350,000 WITH A BLOWN HEAD GASKET. BUT ANY WAY, I CHECK ALL THE CONNECTION AND I DO HAVE SPARK PLUS 50 TO 60 PSI OF FUEL PRESURE ON IT. IT TURNS OVER GOOD BUT WON'T START
Submitted: 7 years ago.
Category: GM
Expert:  Chris (aka- Moose) replied 7 years ago.

HelloCustomer

 

I'm Chris, Thanks for allowing me to help you here on Just Answer.

 

Since you have fuel pressure and ignition spark then you need to next see if you have fuel injector pulse. With the key on all the injectors should have a hot wire, and while cranking the other wire should pulse ground at each injector. If they are not then check your cam sensor.

Customer: replied 7 years ago.
I CHECK THAT AND BOTH ARE GOOD
Expert:  Chris (aka- Moose) replied 7 years ago.
With good spark and good fuel pressure and goo injector pulse then there is one thing left which is low compression.