hi all does anyone know about rising fuel pressure
i took my rs turbo to be rollin roaded he had it the the rollers only taken the revs to 3 grand then he tell me ive got no rising fuel pressure any ideas

 

im not sure i think its the control box on the right hand side of the injection unit check the wiring on it but behind that box is a screw and then behind that is a allen key turn it clock wise to increse the fuel pressure and anti clock wise to decress it try that but you only need to turn it 5 to 10 degrees and no more or youll blow fuel lines off and start a fire under there

 

complete bollocks is what he said. The fuel box is a secondry fuel correction system. U cant tell anything at 3000 rpm really.

 

you what whos that adressed to[

 

are u sure he didnt say boost pressure

 

Don't know what the tuner actually meant, but the fuel pressure, controller by the main fuel pressure regulator, is not supposed to rise. Most efi-cars have a rising rate fuel pressure regulator giving a fuel system pressure of 2 bar + manifold absoute pressure. If he wasn't familiar with RSTs, then he might have noticed this.

If on the other hand, he knows the RSTs inside out, he might have meant the electric control pressure actuator. This is what b13nde was on about. The fuel control pressure only takes care of all fuelling corrections like acceleration and WOT enrichments and overrun fuel cut off.