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Help! Not Building Boost!!!

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Old Jun 11, 2007 | 09:57 PM
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Default Help! Not Building Boost!!!

So I was driving my car for a while today. Morning . . . car ran fine, etc, etc.

About an hour ago I turned my car on, after going to a friend's place.

Started the car, didn't recognize anything wrong. So we're driving to my house.

Went to pass a few cars, went partial throttle - BAM - NO POSITIVE BOOST. So I am like "WTF?" . . . . and I downshift and floor my car. Again, NO POSITIVE BOOST. I hear the turbos BARELY spooling, the blow-off valve is barely hissing, and the car is basically going N/A.

I finally floored it to the point where I got 0.6psi, and then 1.0psi (reading from my Zeitronix Wideband).

After some diagnosing I'm thinking possible 2 problems.

1. Wastegate is f@cked up. Staying open and not holding boost?!

2. My Positive Induction tube, which came off during my accident, was replaced. I'm guessing it came off again.

Right now I'm thinking it's my positive induction tube which is the issue. I'm taking it to my friend's shop tomorrow to get a look at it.

As for the behavior of my car, I'm basically driving a stock N/A 350Z. No boost, car feels super sluggish and slow, and I'm a very unhappy camper at this point.

Any help would be appreciated.
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Old Jun 11, 2007 | 10:25 PM
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piping popped off.....(intercooler, intake, etc) open your hood and Look if not there, behind your bumper at intercooler end, etc.... hopefully it's that simple.
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Old Jun 11, 2007 | 10:28 PM
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Originally Posted by NoLimit
piping popped off.....(intercooler, intake, etc) open your hood and Look if not there, behind your bumper at intercooler end, etc.... hopefully it's that simple.
+1.. cut lines from rubbing ect.. Mine did the exact same thing then I found it was my IC piping just came loose... worm clamps ftl.
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Old Jun 11, 2007 | 10:33 PM
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Originally Posted by maximumsportZ
... worm clamps ftl.
i hate 'em!!
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Old Jun 11, 2007 | 11:35 PM
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Originally Posted by NoLimit
piping popped off.....(intercooler, intake, etc) open your hood and Look if not there, behind your bumper at intercooler end, etc.... hopefully it's that simple.
I'm looking right now . . . . nothing is loose from what I can tell.

I've checked over all the visible worm clamps and such.

I'm thinking it's a positive charge tube that I can't see . . . .gonna jack her up in the morning and see what I can find.

Chris - you have a PM.
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Old Jun 12, 2007 | 01:00 AM
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Bump
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Old Jun 12, 2007 | 01:06 AM
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with a loose boost pipe should the car not struugle to idle and bog especially when going into boost?

maybe its a tear on one of the pipes.

check the pipes especially the ones near where the origional damage took place.

a boost leak kit would be a good idea to pressurise the system and see if it hold the pressure if the pressure drops its a leak somewhere.
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Old Jun 12, 2007 | 07:06 AM
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Are you using the Unichip and the crappy boost solenoid? If so, the solenoid is probably stuck open.
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Old Jun 12, 2007 | 07:39 AM
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If the leak is prior to the MAF, then the car will still run normally, just without any boost. Check for leaks, as its probably an easy fix.
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Old Jun 12, 2007 | 08:11 AM
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Originally Posted by Sharif@Forged
If the leak is prior to the MAF, then the car will still run normally, just without any boost. Check for leaks, as its probably an easy fix.

+1

Be very carfull not to run it like that again you could spin the turbos to fast and they might fail.
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Old Jun 12, 2007 | 12:04 PM
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did you fix it?

does the car idle ok?
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Old Jun 12, 2007 | 01:31 PM
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it is most definitely a popped IC pipe. Check where the hot pipes off the turbo feed the intermediate pipe to the intercooler. That is the most likely spot and they can't really be seen without getting under the car.

With the Fcon, the car will run 100% normal even with a massive boost leak. It will not make boost though
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Old Jun 12, 2007 | 06:14 PM
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Sucks bro, that always happened to me on my 95 3000GT, I would be cruising, hit it for boost and have NONE...Sure its just a loose pipe, you'll be running fine soon...
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Old Jun 12, 2007 | 07:13 PM
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any updates?
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Old Jun 12, 2007 | 07:16 PM
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you didn't happen to buy a used crawford plenum from alberto, did ya? :-D
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Old Jun 12, 2007 | 08:55 PM
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Took it to my friend's dealership (he's the head mechanic there); he has the day off so we put it on the freaking lift and diagnosed the issue.

Sure enough, one of the clamps got loose and the rubber connecting the charge pipes to the intercooler was loose and was hanging, giving me about a 1" open hole . . . . .

Long story short, we disassembled a bunch of the piping and re-installed them, some stuff were shoved at odd angles from my little accident. We fixed everything, reconnected everything and now the car is boosting better than ever.

Guess I was worried about nothing.
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Old Jun 12, 2007 | 09:02 PM
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good to hear
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Old Jun 12, 2007 | 09:04 PM
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And seriously screw half the shops out there (not FP, GTM, etc), but seriously I'm so worried about local shops doing shoddy work I swear I am doing 100% of the work myself now, and if it's something I can't do I'm gonna have my gearhead friends help me.
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Old Jun 12, 2007 | 10:34 PM
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Nice to see you finally got your car back. How is it? You should definitly spend some time under the car making sure everything's sorted out. Nothing rubbing, everything in place, nothing burning up etc.
Cheers.
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Old Jun 12, 2007 | 10:57 PM
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Originally Posted by zzerotwosixty
Nice to see you finally got your car back. How is it? You should definitly spend some time under the car making sure everything's sorted out. Nothing rubbing, everything in place, nothing burning up etc.
Cheers.
We will check the car again on Saturday to make sure she is at 100%.
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