Need help with my Hummer H2 2003 model. It was running fine until the engine suddenly stop. When I check the engine, found a fuel leaking in the fuel pressure regulator. I dont know if this is the cause. Been having trouble starting the engine in the past few months except during morning, but after a few minutes of driving and I stop the engine, it becomes hard to start the engine again. The check engine light intermittently show in my panel. Hope to have some tip on how to locate the problem.

 

Well, first thing you need to do is to stop the fuel leak!!!

 

Do you think the leak in the fuel pressure regulator is enough reason not to start the engine?

By the way, does anybody know the normal fuel pressure in the fuel line particularly in this model of Hummer H2 2003?

 

Yeah, low fuel pressure could definitely cause your issues, apart from the fact that leaking fuel is a serious hazard.
Could also be a sensor, like the crankshaft sensor. But I would fix the fuel issue first.

 

Do you happen to know the normal fuel pressure in the fuel rail for this engine?

 

I was able to replace the fuel pressure regulator, and when I check the fuel pressure, it was stable and normal around 50-55 PSI. No more gas leaking in the fuel pressure regulator, BUT still when I start the engine, it just cranks but never start. What could be the problem, Hope to get some help in this forum...