Low Boost! Low Power!

[dan shss]

All boxes are unhocked trucks only making around 20psi boost and has low power. . I have no codes,no boost leaks,turbo is good,rail pressure will hit about 20k psi with map sensor unhoocked but only around 4k with map pluged in. . If the map sensor was bad shouldnt it throw a code?

I tried new fuel filters that didnt help,unhocked the air filter that didnt help,Fass system is working good. .



This low boost and low power started after I did the following to the truck,Dropped and cleaned fuel tank,added 2mic fuel filter,installed F1 flux 2,s,put used cp3 on,all new fuel lines,cleaned fuel rail and lines,put new rail pressure sensor,??

 

[WUnderwood]

what boxes/programmers are you running? maybe put them back on and see what it does

hope this helps

 

[wcjp]

Is the pickup tube in the tank flowing correctly? Blockage?

 

[dan shss]

new map sensor didnt help. . I have 20psi inlet fuel pressure to cp3 and volume is good,, Im going to try my spare FCA,, When I floor it in gear under a load the rail pressure drops to 3k and the truck will not excelerate,when I let off the throtle RP goes back up to 15K



Still trying to figure it out

 

[cerberusiam]

The FCA controls rail pressure. I assume you swapped in that CP3 without changing the FCA. Might try looking it or swapping to your old one.

 

[WUnderwood]

sounds to me like your rail pressure is draining too much

 

[dan shss]

I tryed my spare FCA still didnt help. At Idle if i unplug the FCA I get 25k rail pressure so the cp3 is good. . I have my rail caped off so thats not a problem. .

 

[WUnderwood]

did you blow the relief valve?

 

[dan shss]

did you blow the relief valve?

Its caped off.