Ok, i checked all the lines, when i take off the vaccume from the boost controler it's working great, u can feel and hear it, strong vac, it's all working, I havn't done anything, i just changed the battery, and now they car won't go over 5 psi, i use to be runing 8 to 10 psi with the prof b, now im runing 5 and its so slow.

I don't have a leak in my charge pipes, checked everything, the turbo is working great. I checked the wiring for the Prof b looks ok, everything hooked up, works like its working great. My boost guage is only reading 5 to 6 psi and it feels like that, so i don't think it's my gauge.

Few things i was thinking it might be, wastegate?
cloged CAT? I have a 2.5 inch high flow, heard it can effect boost
Prof b is broken, or had a short

any input?

 

Im having a similar problem with mine but its kinda opposite, it wont hold any boost at all. If i just let it go the boost will keep rising even though all of the **** settings are set to their lowest. Even when the controller is off it does the same thing, its wierd cause it was working fine to begin with, bump for you!

 

does the solenoid leak like mine did? greddy

https://honda-tech.com/zerothread?id=782447

 

go hks evc 5 it works nice.

 

yeah, mines a joke, cannot figure out that $300 piece of crap. Does anyone know how the hell you are supposed to set it up?

 

mine is a prof b spec 1 not the 2, the 2 is crap i have been told

 

bumps ?? anyone?

 

anyone??????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by fab-forum.com &raquo;</TD></TR><TR><TD CLASS="quote">yeah, mines a joke, cannot figure out that $300 piece of crap. Does anyone know how the hell you are supposed to set it up?</TD></TR></TABLE>

haha they arent a joke just really complicated at first. i figured out mine with help to HELLA JDM and others on here that had the same problem. read this :

if you have a 5.5 psi spring then the max you can boost is found out by this:
5.5 psi x 2 = 11psi take half of that which is 5.5 and add it to 11 psi which = 16.5 psi.

so the max you can boost is 16.5 psi that is your wastegate springs limit for full boost.

so on this greddy profec b the first setting is changed just by turning the ****. the range is from 0-100 percent. this can be interpreted as a percent of yout max boost which is 16.5 psi ok? so say you want to boost 10 psi for example.... you need to calculate what percent of 16.5 = 10 psi. so if 0 % = 0 psi then that means 100 % = 16.5 psi right? so if you want to boost 10 psi then you need to find out what percent of 16.5 psi = 10 psi......

so we discover that 61 % of 16.5 psi = 10.065 psi thats close enough.

set your SET boost ( turn the ****) to 61%
leave the gain @ 10 for now (play with that later to help if it spikes)
now the 3rd setting SETBOOST (setting right after GAIN) this is read in PSI. so if is displays 103 you can interpret that as 10.3 psi ok? and you want this setting set as close to your very first setting of 61 % which is also known as 10 psi.

so since your first setting is @ 61% AKA 10 PSI then you would probably want to have your 3rd setting SETBOOST set @ 90 or AKA 9.0 psi.


hope that helps and remember that this is for a wastegate spring of 5.5 psi

if yo have a different size wastegate spring find out the MAX limit by using the procedure mentioned first above in my post and then figure out everything else accordingly

 

Mine always seemed to work fine. its jsut getting used to the set up

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NextelBuddy &raquo;</TD></TR><TR><TD CLASS="quote">

haha they arent a joke just really complicated at first. i figured out mine with help to HELLA JDM and others on here that had the same problem. read this :

if you have a 5.5 psi spring then the max you can boost is found out by this:
5.5 psi x 2 = 11psi take half of that which is 5.5 and add it to 11 psi which = 16.5 psi.

so the max you can boost is 16.5 psi that is your wastegate springs limit for full boost.


so on this greddy profec b the first setting is changed just by turning the ****. the range is from 0-100 percent. this can be interpreted as a percent of yout max boost which is 16.5 psi ok? so say you want to boost 10 psi for example.... you need to calculate what percent of 16.5 = 10 psi. so if 0 % = 0 psi then that means 100 % = 16.5 psi right? so if you want to boost 10 psi then you need to find out what percent of 16.5 psi = 10 psi......

so we discover that 61 % of 16.5 psi = 10.065 psi thats close enough.

set your SET boost ( turn the ****) to 61%
leave the gain @ 10 for now (play with that later to help if it spikes)
now the 3rd setting SETBOOST (setting right after GAIN) this is read in PSI. so if is displays 103 you can interpret that as 10.3 psi ok? and you want this setting set as close to your very first setting of 61 % which is also known as 10 psi.

so since your first setting is @ 61% AKA 10 PSI then you would probably want to have your 3rd setting SETBOOST set @ 90 or AKA 9.0 psi.


hope that helps and remember that this is for a wastegate spring of 5.5 psi

if yo have a different size wastegate spring find out the MAX limit by using the procedure mentioned first above in my post and then figure out everything else accordingly

</TD></TR></TABLE>

nice explanation on the profec b

 

2 bad im using the one with **** not the digital one anyone?

 

all wires are hookedup great, there is vacuume from the boost line to the sender any idea? It looks like it working but it's not

 

yeah mine doesn't work either...? but my problem is also the boost keeps going up even with all the setting low...

how can you check to see if the cylinoid is leaking?

 

did u change the dip switches in the back of the head unit...internal / external wastegate setup???

 

this is Hella_JDM , ya nextel hooked it up with the logic , its real easy . anyway alex your spec 1 is an antique piece of **** . solenoid is prolly bad dood.

 

Ya i hope it's not any way to check it, no leaks, I am sure no leaks at all.

 

tuned out to be, i had the wires along the charge pipe and it moving striped the wires, i just re solder the wires and moved it, so the charge pipe isn't touching

Runing cool as ****, thanks for the help all

 

Here we go again. Nextel buddy explained it good for the Profec b-spec. I hope you get yours figured out.