Starting Problems after Sitting Over Night

[jcamaro]

I did some more digging. Checked fuel pressure again. 51 lbs with key on during CRANKING BELOW 50lbs like 45lbs. Read somewhere needs to be at least 50 during cranking. What do you say?

 

[jcamaro]

It does have spark in the morning. What about the fuel pressure when cranking being it's below 50 lbs? When I spray carb cleaner in it starts and runs.

 

[SunlitComet]

you should be able to run and idle on 45 pounds. perhaps you should perform an injector balance test to see where and if your injectors are allowing fuel to flow.

 

[99Vortec]

Fuel filter doesn't have sediment/debris in it?

 

[jcamaro]

Turned out to be the fuel pump. During cranking if the pressure is anything less then 50lbs it's the pump. Again during cranking. If in doubt spray starter fliuld in the TB and if it starts bad pump. Thanks for the help. Now I have a up and down idle when I first start it gets better after I drive it. acts like a vacumn leak I need to check it out. Fuel pressure regulator holds so it is not that.