Getting no boost.

[laxboy36]

so after replacing the hg, i got the car running and both boost gauges sit at 0 when started and running. so i try beating on it to see if i am getting boost and i can hear the turbo bc im straight pipped but it wont go past 0

 

[laxboy36]

and the car isnt moving like it would when i am hitting 11psi

 

[TomFraser]

Stock boost gauge is electric, is the aftermarket one at all electric?

Any engine codes?

Tuning with?
Could it be a boost leak? Car will run fine if you are using a map sensor instead of maf, but when spooling up it will just dump it out. Does not apply if you're tuning with a maf, or are stock.

 

[laxboy36]

stock electric, aftermarket one is sunpro. no codes, no tuning. umm idk about boost leaks yet. car has stock maf with stock housing. i can hear the turbo spooling but the gauges arnt going past 0.

 

[TomFraser]

If it was a leak large enough to prevent boost entirely then the car would barely run... what does the sunpro show for vacum at idle?

 

[laxboy36]

tru, the sunpro shows 0 and so does the stock one.

 

[TomFraser]

it should show vacum, where is the sunpro hooked into the system?

 

[Moy]

something isn't hooked up. did you make sure your vacuum hose(s) to the gauge sender(s) are hooked up?

 

[laxboy36]

I hooked the aftermarket one to the electric stock sensor tube. And when I am driving with throttle open at like 20% both gauges go to -10-4psi

 

[yongai27]

I think at idle your boost gauge should be at like 21 vacuum. Thats if everything is working normal i think. Idk if that helps.


edit: wait im confused, is it 0 psi at idle? but you can hit 11 psi when you are flooring it or something?

 

[laxboy36]

At idle it's at 0. I hit 11 psi bc that's what I hit before I changed the hg. Yes it should be at -21 psi

 

[Nick M]

At idle it's at 0. I hit 11 psi bc that's what I hit before I changed the hg. Yes it should be at -21 psi

Not possible with a throttle plate.

 

[laxboy36]

Yes at idle both sit at 0, before it was -21 psi.

 

[CyFi6]

You probably hooked up your vacuum line to ported vacuum. Make sure that the hose for your gauges are hooked up to manifold vacuum, if they are hooked to any of the ports on the throttle body, it isn't going to read properly.

 

[laxboy36]

But why is it when I beat the car up it doesn't feel like I'm hitting 11psi?

 

[Jimbo]

I hooked the aftermarket one to the electric stock sensor tube.

No. Hook up the aftermarket boost gauge vacuum line to the intake manifold, not to the stock boost sensor.

 

[laxboy36]

Before I did the hg the aftermarket was hooked up to the stock sensor

 

[laxboy36]

when i drive the car you can hear the turbo spooling but it isnt pushing you back when it hits that 11psi. both gauges stay at 0 when driving hard. its like the turbo isnt spooling to its max psi.

 

[barkz]

judgeing by ur last thread of how you couldnt get the head off, im guessing you hooked something up wrong, or just not at all...

http://www.supramania.com/forums/showthread.php?132010-Just-a-lil-clean-up

i cant see the pics on my govt computer, but i think this is the thread i made where i show where my boost gauge is hooked up

 

[laxboy36]

I fixed it, I had the egr hose and intake manifold hoses mixed up