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Forced Induction Forum Sponsored by Active Autowerke
Discuss supercharging, turbocharging and even nitrous and water injection here.
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Old 11-28-2008, 06:40 PM   #81
lrogers80
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I just tapped my Boost gauge to the 90 degree elbow just before the throttle body. AA provided a little blocker I was able to especially unscrew and install a barb connector. If I rev it up, I get almost 10psi of boost and this is with my intercooler installed. That boost is getting to the throttle body just fine, but after that point not sure what's happening to it. If I connect the boost gauge to the manifold, I don't get any boost barely 1 psi at times.
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Old 11-28-2008, 07:21 PM   #82
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Old 11-29-2008, 05:42 PM   #83
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I doubted the intercooler as the issue, you'd feel the leak.
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Old 11-29-2008, 05:49 PM   #84
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I replaced the Tensioner and the Belt and still no difference.

As I drive I notice that if I press the gas pedal WOT I completed loose boost, but if I lightly give it gas, I get a little boost up to 5 psi. It feel like when you give a car too much gas and it fall flat. It really feels like my throttle body is closing and forcing the boost to get pushed back to the bypass valve. This is just really weird. I have no clue what AA programmed or even if there is an option to tell the throttle body that it's OK to accept the extra air. To me it feels like that's what the throttle body is doing.
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Old 11-30-2008, 11:55 AM   #85
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The throttle body is a mechanical device. The ECU doesn't need to tell it to "accept" boost. It's either open or closed, it could care less how much air is going through it.
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Old 11-30-2008, 03:43 PM   #86
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From what I have read my 323i has a cable but that cable is to move a potentiometer that sends a signal to the butterfly motor. The computer can control it for traction control purposes. This just suck I really wish I could figure this out, it's just killing me.
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Old 11-30-2008, 04:24 PM   #87
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Yeah, but in 4th gear, you won't have traction issues. So I really doubt the ECU is slamming the throttle plate closed.
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Old 11-30-2008, 04:46 PM   #88
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Do you think its a boost leak under load that I can't find because I am not underload in neutral and reving in neutral won't let me feel the boost leak?
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Old 11-30-2008, 05:58 PM   #89
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Well, you don't make boost when you're revving the car in neutral, so yes, I'd wager you have a boost leak.
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Old 11-30-2008, 08:28 PM   #90
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Got boost!!!!!!!!!!!!!!!!

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Old 11-30-2008, 08:39 PM   #91
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What the hell you didnt remove the protective cap??? I thought your intercooler was clogged. Thats why I said to try to by pass it.
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Old 11-30-2008, 08:40 PM   #92
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That cant be on your car.
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Old 11-30-2008, 08:49 PM   #93
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Yep. My friend that helped me install this kit, installed the supercharger and and I did the piping, I had no clue that that cover was there simply because he had already installed that elbow to the compressor side.

I soon as I took it off and got everything put together, the car spiked into boost and I almost lost the rear. This car has so much power I was a little nervous hitting it. I knew it had to be something simple. I actually was going to remove the entire supercharger and start from scratch until I noticed this big red cap looking at me.

I am so happy. Thanks everyone for helping me keep this quest going.
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Old 11-30-2008, 09:57 PM   #94
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Originally Posted by lrogers80 View Post
Yep. My friend that helped me install this kit, installed the supercharger and and I did the piping, I had no clue that that cover was there simply because he had already installed that elbow to the compressor side.

I soon as I took it off and got everything put together, the car spiked into boost and I almost lost the rear. This car has so much power I was a little nervous hitting it. I knew it had to be something simple. I actually was going to remove the entire supercharger and start from scratch until I noticed this big red cap looking at me.

I am so happy. Thanks everyone for helping me keep this quest going.
One of those D'OH! moments. We all have them.
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Old 12-01-2008, 12:13 AM   #95
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Next time tell your friend to limit the help to watching/taking photos/bringing f00d
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Old 12-01-2008, 12:15 AM   #96
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Congrats! Told you something was blocked.
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Old 12-01-2008, 01:31 AM   #97
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your lucky that didnt damage your SC unit.. I would check the entire plumbing for left over bits, primarly your intercooler (inside the tanks on both ends), as well as intake manifold.
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Old 12-01-2008, 04:38 AM   #98
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This was a stupid mistake. I almost didn't want to post the solution, but I know someone out there might run into a similar problem one day. I really hate when people start threads and never post the solution in the end. Thanks again everyone.
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Old 12-01-2008, 09:12 AM   #99
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Glad to see everything worked out.
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Old 12-01-2008, 10:33 AM   #100
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Wow, that's crazy. Definitely check everything to make sure you don't have bits and pieces in the intake tract.
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