- Thread starter
- #26
Hunteremerson17
Probationary Member
- 19
- 1
- Oct 10, 2018
-
Liberty,
Kentucky
Fuel pressure should be 47-50 psi with the stock FPR.
With an adjustable FMU like a vortech SFMU and larger injectors it will be lower than that.
Do you have a picture of the aftermarket one so i can ID it? Its a FMU that raises fuel pressure x number of psi per pound of boost pressure. Its so that you get the extra fuel you need to go with the increased air from the turbo.
You definately need it, dont boost without it or you will destroy the motor from running too lean.
Do you have a wideband o2?
Also clear the codes and see if they come back. I can see in the last pics you posted that you have a missing link installed (so the map sensor doesnt see boost). So if its working correctly the map sensor code may be because of the disconnected vacuum lines.
Same with the evap code. In stock form, the fitting with the 3 hoses on the back of the intake manifold connects to:
- egr solenoid (side of head below cam sensor)
- cruise control vacuum resivour (underneath intake manifold)
- hard line on firewall ( goes to evap vent solenoid by gas tank)
Could this be the reason why it’s so hard on gas? Like 20mpg tops... plus I run 93 in it and it’s like $3.08 atm