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boost levels low??

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Old Jun 17, 2008 | 02:33 PM
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boost levels low??

I have read about stock boost numbers and I am getting different opinions. I would like some advise.

I have 4" turbo back exhaust, k&n intake(only till I cut the stock box, then 6637). Truck is 03 with 140,000 miles.

With no programmer I am getting boost of 10-11

With SCT programmer I am getting 15

With SCT and red line unplugged from wastegate I get 17

Could I have hooked up the guage improperly? Is there a bigger problem? Turbo going bad? I cut the map line to install boost guage
 
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Old Jun 17, 2008 | 02:35 PM
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mines stock and i can hit 20 without un plugging the wastegate.
 
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Old Jun 17, 2008 | 02:47 PM
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sounds a little low..check the up pipes for any soot...all 6 IC boots for any splits or loose clamps. check the map line..just to make sure you got them clamps tight..you may want to build a boost leak detector to check the boots...pull air intake from turbo..look at wheel for dusting,chips,or bent fins..spin wheel..should spin nice and smooth..grab nut on the wheel..push it in and out..there should be no play..wiggle up and down then side to side like your checking a wheelbearing ...you may feel very little play.002 at the most but no more then that....
 
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Old Jun 17, 2008 | 02:53 PM
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Im going to check the turbo wheel. I have a WW to install but dont have time to tackle that now. I will report shortly.
 
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Old Jun 17, 2008 | 02:54 PM
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How does the truck feel as far as power? Does it make a big difference with the chip? Check what was already said. Have you checked for codes?
 
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Old Jun 17, 2008 | 03:18 PM
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With the chip I get more power and a ton of black smoke. Without the chip I get almost zero(very hard to see) smoke. I have some pics Im going to try and upload of the turbe wheel
 
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Old Jun 17, 2008 | 03:21 PM
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What is the pipe in the front of the pic with nothing hooked to it?




Looks ok???
 
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Old Jun 17, 2008 | 03:23 PM
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looks good..was there any play in the wheel????
 
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Old Jun 17, 2008 | 03:26 PM
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No in and out play and only a little left and right play.

Whats the hose not connected to anything for?
 
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Old Jun 17, 2008 | 03:28 PM
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That is your ccv ( crank case vent ) tube. It should be hooked to the metal piece between the intake tubes. If you are getting lots of black smoke and little boost, you have a boost leak somewhere. You might need to take the boots off and clean them and make sure they don't leak when you install them. There are 2 under the spider in front of the turbo, they are orange. Make sure they are tight.
 
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Old Jun 17, 2008 | 03:35 PM
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Originally Posted by miller_feed
That is your ccv ( crank case vent ) tube. It should be hooked to the metal piece between the intake tubes. .
just what Rick said..make damn sure you plug it back in..you will suck in dirt though the hole in the intake and that wheel wont look so good.....
 
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Old Jun 17, 2008 | 03:39 PM
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Ok I didnt notice anything was hooked to it when I removed the intake but it must have been. Also, I decided this was a good time to do the foil delete mod. When I removed the IC tube it had oil in it at the bottom just before the intercooler. Is this normal?
 
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Old Jun 17, 2008 | 03:40 PM
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Originally Posted by miller_feed
There are 2 under the spider in front of the turbo, they are orange. Make sure they are tight.
Can you elaborate some more??
 
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Old Jun 17, 2008 | 03:40 PM
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I sure that tube was hooked up before you took the intake off. Like Ron said if you don't plug it back up, kiss your turbo good by. No need for an air filter either with that big hole open to the air. Make sure you put a clamp on it also.
 
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Old Jun 17, 2008 | 03:45 PM
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On this pic you will see the orange spieder Ron painted. At the bottom of the two tubes is orange boots that need to be tight also.

Hope you don't mind me using your pic.

 
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