Help with Profec B boost controller.

[4door_Sleeper]

This is a follow up to my previous call for help.

Since installing my profec B, I continue to come on to boost much later than I did with a bleed valve.

Has anyone in SA got a Profec B (series 1) boost controller? (private or business)

If I could catch up with you and swap their controller (black unit under the bonnet with 2 vacume lines attached) with mine for 5 minutes and take the car for a spin around the block it would be much appreciated, and help me determine if the fault lies with my unit or the turbo. - (10-15 minute job from start to finish)

I'm getting desperate guys, the car drives well but it takes so long to come on to boost that its not funny. (no feeling of power until 4500-5000 rpm.

[Maxx]

i am not a pro, but it sounds like a leaking to me, even the boost controller not working u should still remain stock response

[4door_Sleeper]

Hi Maxx

I have checked for leaks, but havnt found any. It holds its pressure/vacume well, and I have it set to 13psi (no trouble and no spikes).

But wouldnt a leak give me higher boost?

After all a bleed valve is really just a controlled leak device, so is anything a leak should give me more boost (not that the amount of boost is a problem)

My problem is that the boost is comming on much later in the rev range.

Thanks for your thoughts however.

If anyone else has had this problem I am open to your ideas as well.

[Nightcrawler]

I have a spare ProfecB head unit u can borrow (but no solenoid), if that helps. I also have a bleed valve lying around if you want something else to try.

[Steve]

I have a profec b that just wont control boost, ie, it just keeps climbing. You can borrow my solenoid to try on your car if you like, actually it may be worth doing a swap to see what happens.

do you live north or south?

[Nightcrawler]

hey Steve, I had the same problem .... I bought my ProfecB from an Australian guy in Japan called Japandy. Tilbrooks installed it and it did the same thing as yours - would not limit boost it just kept climbing. So I got Japandy to send me another solenoid and it did exactly the same thing. So I got him to send me another head unit and it did EXACTLY the same damn thing!!!! Mark from Tilbrooks had a heap of different people have a look at it, but they all said it was hooked up right. So they sent the 2 head units and 1 solenoid to James at D1 and he said they both worked perfect on the bench, holding and releasing pressure. I gave up, and bought a new Hybrid EBC.

George from GT Autosound was installing my Hybrid, and he said he couldn't get it to work - it would just skyrocket the boost!!! SAME DAMN THING!!! He said, he switched a couple of the wires around, and it works perfect. He said the wiring was mixed up from the factory (wrong colour wires) - and the ProfecB would have worked fine if the wires had been switched around. Not sure if this story helps, but maybe you have the same problem?

[Weq]

what have u got the first knob set 2?? i forge4t whats its called, ratio or whatever. make sure its on sharpest and work ur way back to a steady boost pressure. that controlls how hard/fast boost comes on

[4door_Sleeper]

Weq

The sharp/soft dial you are talking about is set to 100% sharp - things only get worse if i turn it towards soft.

Thanks for the thought though.

If anyone else has had this problem I am open to your ideas as well.

[Steve]

Hmm, well I think I may have discovered what the problem was - the dip switches on the back of the controller were set to external gate:)

I hope it solves my problem - havent tested it yet.

4door, what do you have the switches set to on your car?

[Steve]

Problem sorted, the boost controller works well and is really easy to set up.

4 Door, have you checked the switch settings on the back of the controller, as greddy show a setting to use if 'overboosting' - perhaps this is how yours is set, which would explain why it takes longer to come on boost.

good in theory anyways:)

[Bl4cK32]

off topic, so hows the 180 treatin ya these days steve?

better/worse than the r33 ya reckon?....or just both unique?

[4door_Sleeper]

Thanks steve, I've already had a look at that, and its not the problem.

[Steve]

Different car to the 33, but nice to throw around - like a go cart on steroids love it. Just got to get the afm and injectors in so I can tune it.

[4door_Sleeper]

Thanks for the loan of the solenoid and controller, :thankyou: I have tried both and the problem still remains.

I have also replaced all of the vacuum hoses, and have now plumbed the control unit into the bow-off vacuum line (to further reduce the length of hose) but the problem still remains.

At this stage I will accept help from Japanese Holly men :ghost: , Voodoo priests, Jedi knights or anyone else with similar qualifications