Boost issues

[Jasoncharles]

I just recently added a Procharger when driving and giving it gas I see no boost even a little vacuum sometimes when I step off the gas then it will show boost at about 7-8 psi but Not when opening the throttle also it surges at idle when coming to a stop even almost dies. I have tune with 42# injectors hitachi 90 mm maf 265 fuel pump the tune was from dirty dirty racing. Any help would be appreciated

 

[Deleted member 38176]

What head unit?
Do you have a bypass or a blow-off?

I can tell you that you have a POS maf...but need more info

 

[Jasoncharles]

Blowoff non recirculated and have the Ford lightning maf 90 mm

 

[Jasoncharles]

P1sc head unit

 

[Jasoncharles]

Also when I air tested system idle air control valve was leaking so I ordered a new one

 

[Decipha]

it sounds like you have the bypass hooked up backwards

it should vent while at idle / decel (no boost)

and close at part throttle and wot

 

[Jasoncharles]

I completely removed the valve and have the same results.

 

[Deleted member 38176]

Post pics of your setup. You might also have a ty tune

 

[Jasoncharles]

But would the tune having anything to do with getting boost? Boost only shows when closing the throttle.

 

[Jasoncharles]

This is a video just parked reving the engine doesn’t show boost till I let off the gas IMG_0318.MOV

 

[Jasoncharles]

I don’t know how to upload video.

 

[Dark04GT]

You should be under vacuum when the throttle body is closed. Something is off on your gauge or setup.

 

[Jasoncharles]

You should be under vacuum when the throttle body is closed. Something is off on your gauge or setup.

I have the boost gauge ran in front of the throttle that’s why no vacuum .