hi i have an s4 and i recently put in a different enigne but now when i try to start it wont go
i know its fuel not getting there because everytime i put some starting fluid it will turn on
also there is a hissing noise coming from the pressure regulator(idk if thats necessary)
could it be the fuel pressure or the injectors?

 

Have you verified that the fuel pump is doing its job? Jumper the fuel check connector if it needs verification.

 

Did you use the original cars harness on the engine or a harness that came with the new engine?

 

yes the fuel pumps and yes i used the original harness

 

Is the replacement engine a JDM? If so, fuel lines are reversed relative to their US counterparts.

 

no the engine is usdm pulled from another s4
could it be the pressure regulator?
becuase i tried it again without the starting fluid and i smell a slight amount of gas everytime i crank it

 

dirty fuel lines ?

edit: dirty injectors ?

 

hmm is there a way to test the FPR?

 

I'd reverse the fuel lines at the engine and have another try.

FPR is checked out by teeing a gauge into the Pressure line going to the engine from the fuel filter and turning the key On, engine Off, with the fuel pump check connector jumpered. Pressure should read 37-39psi if good.

 

There is a procedure in the FSM for checking the regulator and the fuel pump. You will need a fuel pressure guage.

The regulator should not be making a hissing noise. They are a well known failure, and a fire hazard. Be careful.