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6.4L Performance Parts Discussion What has or has not worked for you?

 
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post #1 of 6 Old 01-20-2010, 12:40 PM Thread Starter
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Boost Low

Posted this in the motor problems section and didn't get any hits, maybe someone can help me here

Okay guys,
Normal boost numbers for me with the 275 and delete are about 15 to 19 at 80 mph. Yesterday I noticed that the whooshing sound I usually get when the torque converter locks up was not nearly as loud as usual and now my boost is only about 7 to 9 at 75 or 80 mph. Anyone know what could be going on? I haven't lost any coolant and just a quick visual noticed nothing out of the ordinary. I still can see 25 or 30 psi taking off without going WOT although I have seen 55 or so in the past.

2008 F250 CC/SB 4X4 Lariat all options except nav.
DPF/Cat delete, 4" staightpiped magnaflow exhaust, AFE intake, Spartan tuned
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post #2 of 6 Old 01-20-2010, 01:58 PM
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Those boost numbers are way low! Get that checked out as soon as possible.
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post #3 of 6 Old 01-20-2010, 04:17 PM
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You have an exhaust up pipe leak,

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post #4 of 6 Old 01-20-2010, 04:56 PM
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My Black Maxx on the HOT setting(275)I only read 5-9 at 70-73mph and 40-42 at wide open throttle.

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post #5 of 6 Old 01-20-2010, 05:04 PM
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Check your boots on the intercooler and associated boots from your turbo to your intake. One might have torn or have a small crack in it.

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post #6 of 6 Old 01-20-2010, 06:08 PM
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Quote:
Originally Posted by XPLOSIV View Post
Check your boots on the intercooler and associated boots from your turbo to your intake. One might have torn or have a small crack in it.
Thats what I was thinking if its a boost leak which it seems like
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