Im having a small problem with my profec-B.. I am 99% sure everything is installed correctly. I have vacum lines running from sideport of wastegate-manifold, top port of wastegate(tial)- outport on the black box, and inport-manifold.. I know the side port of the wastegate is supposed to run to a port(u have to tap a port into the chargepipe) on the chargepipe, but I am under the impression that it will work fine if u just run it to any vacum source.

Now onto the problem. I am experiencing a wierd occurance when blipping the throttle.. in any gear at any time, if I blip the throttle, the wastegate will open very quickly and then shut again. (have u ever ran your car with the wastegate acting like the only exhaust system? thats what it sounds like). It happens when I am racing and shifting gears too, sometimes when I hit the next gear and slam the throttle the wastegate opens quickly, and then closes again, causing me to bog and loose boost.

any one else ever experience this problem?

 

You said you are running vacuam lines from your charge pipes? That is not a good idea, all vacuam sources have to come from the intake manifold. Also check the settings on the back of the Profec-B. I havent had any problems with mine. Im almost sure its the vacuam routing though.

 

im not running a vacum line to my charge pipe, but in the instructions, they tell u too.

 

And you have the vacuum port from the manifold to the back of the unit right?

Try turning the dials back to the left and check your dip switches. See what happens then. You should read on your gauge base pressure of the spring in your wastegate.

 

i think the best way to do it is to have it on the chargepipe before the tb. maybe the tb opening and closing has something to do with it.... i dont see how though.

 

yep, I have a vacum line running from the manifold to the back of the unit. I have tried turning the balance to full mild and full sharp, it didnt seem to help.

im gonna go and play with the switches on the back, right now I have it set up for external wastegate(no overboost), ill try setting it up differently.

 

DIREP, you have the manual right? i thought it gave the proper settings. does this not work?

 

yeh, i have the manual, and I know everything is installed right. I also know I have the setting on the back correct too. Only thing I didnt do is tap the port into a charge pipe, but its supposed to work just the same off the manifold.. Im just trying to figure out why vacum is pulling the wastegate open when I hit the throttle.

I used the LARGE greddy vacum line that came witht the kit, only on the top port, I have a suspicion that it could have somehting to do with the wastegates odd behavior, but i dunno, i think it should still work. Ill try that out tomorow after I figure out the over heating problem..

 

try tapping it to the intercooler piping like the instructions said. Heres mine. Took me about 2 minutes to tap this.




[Modified by intekragsr, 9:35 AM 5/17/2002]

 

the line in the tial wastegage that you shoud use is the middle one, not the side port, and the other big line goes to the piping before the throttle and the litle line goes to the intake manifold, the instructions recomend to use the same line as the fuel pressure regulator.

also, the side port of the wastegage goes before the throttle also.

 

you had to drill a hole in your charge pipe? i see...

i think i rather stick to a mbc to avoid doin that.

 

That is incorrect. The purpose of the EBC is to compare 2 pressure sources and regulate the pressure. So it takes the source off the intake manifold and chargepipe, while the rear vaccum line of the profec B is routed to the actuator. Plus, I think Greddy printed their instructions the way they did for a reason.

 

Ouch, is that hose kinked on purpose?????

 

yes its kinked on purpose. I had to do that because when I tapped it I had no boost controller. I had to kink it till it arrived. But now I got it and am happy

 

Aaaah gotcha.

 

The profec B instructions that i got where in japanese, so I entered the greddy site in search of something and found the instructions in simple inglish, there are 5 diagrams of how to connect the profec b and about 10 settings for the dip switches just select the one that fits your description, if you look at the diagrams you will se that one of the lines goes before the throttle plate, I put mine in the charge pipes because the instructions say so, and if you put it inside the vacumm lines in the manifold you will be inflicting negative pressure to the wastegage diafram, when it is designed no to have vacum there only in the top port, not the side port, i olso has an hks evc pro boost controler and the instructions said the same thing.

 

how did u fix this problem? i am having the same exact trouble.....

 

He sold it..lol

 

really? damn! lol, well i was looking at greddy's site and it's funny cause it says to tap into the charge pipe but on the instruction booklet i have it says top port goes to "out" on the greddy control motor and the "in" goes to the intake manifold, then a vacume source from the fpr (same **** as mani) goes to the back of the controller unit, i'm stumped cause this is exactly how i have it,

 

From the picture, can u make #2 come from the intake manifold instead of coming from the charge pipe? I dont feel like drilling holes in my pipings.

 

Mine worked very good for me, but for direp972 it didnt. The only thing we had different was that I hap my charge pipe drilled for vaccum hose and he didnt. You can tap the charge pipe and in most cases the turbo's compressor has a fitting on it. Niether mine nor Dire972 had a fitting on the turbo, so I had to tap my charge pipe.

I worked for me, and thats really the only difference between our 2 set ups.

art

 

i ended up selling the bosot controller but i am 100% sure the problem was because I didnt tap that fitting into the charge pipe, u can also use the fitting on the turbo if u have one.

 

can someone answer this for me or have any insight on this??