Cranks but no go

[TheSnowSnake]

2004 Pontiac Montana has had issues over lasst 3 weeks with poor start and excesive lack of power. It did start and ran well in the cool morings but poor to no start in the heat of the day. Now it is a brick won't start at all. We have fuel in the rail and spark at the plugs but no signs of firing. The injectors are the only thing I can think of, I have seen electronics do this before. what to change?

 

[melsg5]

what is the fuel pressure reading, test it. Did you have a check engine light on?

 

[TheSnowSnake]

Exact pressure unknown but seemed strong. no engine light on.

 

[melsg5]

you cannt tell pressure by looking it has to be tested, try starting fluid and read the link.

http://troubleshootmyvehicle.com/gm/3.1L-3.4L/how-to-test-the-fuel-pump-1