Problems With Profec Spec B 11

[Leeman]

Hi guys! Haven't been on here for a while and would like some help. I'm having probs with my boost controller and was wondering if anyone else has had problems with these too? Mine appears to not be working as i have hit 20.9 pounds boost when its set at 11psi, yes 20.9! Not good!! Tried it on low which is set to 8 psi and still went off the Richter.

Does anyone know what could be wrong with it?

The controller is about 18months old and brought it brand new from reputable dealer on SAU

Cheers

[skylineguy19]

hey man, i had similar issues but it was a wastegate issue. Have you upgraded turbo or anything?

On mine the standard wastegate couldnt open enough to vent the boost so i was meant to be sitting on 8psi and was reaching 22 :S and i am also running the same EBC.

So yeah could be a wastegate issue.

Edited November 27, 2008 by skylineguy19

[SLED]

correct Luke. Hi Lee

I have similar issues with my HKS EVC 5.......as Luke said, more than likely a wastegate issue. Are you running cheap short split dump pipes? They seem to be my problem where the gate either is restricted from opening all the way or the passage is too narrow to get around the gate, hence the spike issues.

[gt-ahhh!]

i have a profec b II also, and you cant "set it to 11psi". you set it in percentages of the turbos capacity or something like that.

from what i have heard/read, the settings for a certain amount of boost vary depending on your turbo and other mods. ie: if you changed turbos, your previous settings might not get the same amount of boost. whats your high mode set to? mines at 57% but thats pulling 18psi. i figure youd want about 30%.

[Leeman]

Thanx for quick reply guys! Hey Pete how's things . Only have standard turbs. Mods i have are the usual zaust, cooler, controller, pod. Does that rule out issues with wasegate? Could it be a faulty solonoid in the profec?

[kidafa]

what do you mean by you have the ebc set at 11 psi and 8 psi? The Profec B spec II work on a percentage increase over stock. Their is also a gain setting which you use to make sure the boost is consistant throughout the enither rev range. eg. if boost is dropping of at high rpm increase the "gain" or if its spiking decrease the gain.

[Leeman]

what do you mean by you have the ebc set at 11 psi and 8 psi? The Profec B spec II work on a percentage increase over stock. Their is also a gain setting which you use to make sure the boost is consistant throughout the enither rev range. eg. if boost is dropping of at high rpm increase the "gain" or if its spiking decrease the gain.

I dont set the boost, my mechanic does on the dyno. Was running fine for the last 18 months until it played up. I dont know the percentage, just what boost it runs which is 11psi on high and 8 psi on low. Either way its not working properly

[Jonnyboy89]

pretty sure its the wastegate dude. the bolt that is inside the gate, on that arm which moves to allowboost e.t.c that bolt should be plum inside the gate, ifs its out check that or take it back to the dyno place! i had a profec in my car and only ever used high and low boost settings with the flick of a switch no % what so ever

[Cubes]

Make sure the hose running to the controller isn't split.

[chef_stagea]

i just braught my self a pro fec b controller today, and ive set it up (on-intercooler pipe and con or sumthing to the waste gate... however im not hitting high boost... ive tryed everything like pumping up the gain % etc etc but it wont go over llike 8.8... its in my stagea (rb25 neo) and there are 3 lines that are blocked off now... have i dont it right?

[Krishy]

on the solnoide block of one of the holes.....i think that was my problem before adam