I took my truck to a mechanic where i had a new fuel pump and fuel filter installed. My truck still wouldn't start, I put about five gallons of gas in yesterday and it cranked up fine, went out to start it today and all it will do is turn over. Fuel pump is brand new and so is fuel filter, where else should i start looking. Also after i try starting, engine makes a weird sound like its stuttering a little before stopping.

 

How much gas is in the tank? Maybe you should try adding some more gas to see if that helps.

 

I filled the tank up yesterday....and it was running fine afterwards....now it wont start....

 

Are you getting spark?

 

Yes I am....

 

Fuel pressure regulator or dirty injectors.