Can't raise boost

[Tzar177]

Well it only works if I have the wastegate vac line hooked up to my vacuum block. If its hooked up to the hot pipe nipple, then I can only get up to 5psi

 

[hornsfan10609]

Very interesting... I'm confused by this

 

[Tzar177]

Well boost is back down to 5psi again. 9-10psi only worked for a few days

 

[Tzar177]

Well I figured out that it will only boost 9-10psi if I have a vac leak in the wastegate line. I thought if there was a vac leak I wouldnt boost much if at all. This is confusing...

 

[Tzar177]

bump for some answers

 

[got_psi]

running into the same problems you are....did you already rule out the possibility of a weak spring?

 

[Tzar177]

running into the same problems you are....did you already rule out the possibility of a weak spring?

No, its brand new. If the spring is too weak it won't boost correctly?

 

[got_psi]

if the springs too weak, it wont built boost to a higher level, but if you said that it was working fine for a day.....that seems really weird...

 

[Jedidiah55]

how are your pipes? is everything bolted down good? does your blow off valve leak by chance? just some ideas could be an intake leak, is your boost gauge right? could your boost gauge have a leak?

im just throwing out ideas

 

[dacquesta1]

make sure your intake manifold is bolted down tightly...no leakes from throttle body etc...

 

[Tzar177]

I've sprayed carb cleaner around everything, and found no leaks. It only worked for a day cuz I had a vac leak in the wastegate line. Guess I will have to try a stiffer spring

 

[igdrasil]

If you want more boost the cheap way is to change internal spring, add an internal spring, add an external spring or a cheap boost controller.

Leaking boost from the wastegate feed will equalize the flow anyway with instability to keep boost levels.

Try using other boost signals. Using the hot side (before intercooler) will have 2-3psi more in line resulting in lower boost levels.