Hello, i have a evo 8, build engine, ATP GTX3582 stock location turbo, double pumps, for e85, bosch 2200 injectors, the last week my car begin with the fail in the injector number 4, we will clean the injectors and the car works perfect, the pressure on the fuel rail 45psi, all was good, i drive today 300 miles from the shop to my house, and fuel rail today show 35 psi, the car dont spool up, and go lean, we change the fuel line, the fuel pump, and the issue continue, im really desperate, my mechanic is very far from my town, and is a PITA drive for this situation, somebody have an idea? thanks for the input!!!

 

Have you checked the fuel pressure regulator?

 

++2 First place you should check is your fuel pressure regulator. Check the Line also check the power wires to the fuel pump to make sure you its getting power.

 

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Today, I connected the secondary pump, and the pressure went up to 45psi, with the main pump it only goes up to 20psi, after that tightened the screw of the regulator and the pressure was stuck at 45psi, I removed the regulator and checked the internals but everything looks good, tomorrow I'll try with another regulator! thanks guys!!!

 

Did you set base fuel pressure with vacuum line dis connected? With the vacuum line off the base pressure should be 43.5 then put the vacuum line back on and take it for a test drive

 

Yes sir, the car have 280 kelford cams, and no diference with the vacuum line connected or disconnected, the pressure with the main pump is 10psi, and with the secondary is 40...