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Discussion Starter · #1 ·
I have a 2007 TrailBlazer LT 5.3 V8 with the following problem:

When I measure the pressure with the key ON, the fuel pressure is at 50psi, ignites with difficulty and once it ignites the fuel pressure goes to 95psi immediately and when the key go back to ON the pressure drops to 0.

No idea what could it be... :hopeless
 
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