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Boost spikes like crazy all of a sudden

Old Mar 22, 2007 | 01:24 AM
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Boost spikes like crazy all of a sudden

Just a hair over 36k.

I have had the same mods for the last 5000 miles. But all of a sudden boost spikes all the time.

Usually i would have to set the AVCR at 1.45 to hold 1.45 bar of boost, but now when its at .6 bar it spikes up to 1.6 at times like if the boost controller was set at 1.5.

Mods are just o2 housing turbo back test pipe intake manifold and a boost controlled 3 inch dump on the downpipe.


Nothing has changed, so im not sure what it can be...
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Old Mar 22, 2007 | 01:39 PM
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up for anyone that knows...
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Old Mar 22, 2007 | 01:56 PM
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From: 2003 Evo VIII - Silver
check all the hoses from avcr to the car to make sure there is not a problem in the hose going to the wastegate

if that fails - reinitzlize the avcr
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Old Mar 22, 2007 | 11:59 PM
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il check tomarow, i really havent had a chance to check...

could a leak be causing this??
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Old Mar 23, 2007 | 12:03 AM
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sounds like a leak in the vac hoses...

my friend's vac line rubbed the fan and developed a hole and was spike crazy...

cheers!
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Old Mar 23, 2007 | 06:57 AM
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Definately sounds like a leak in vac hoses. Did you secure the hoses during initial install?
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Old Mar 23, 2007 | 07:06 AM
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yes last time this happened to me the hose from my MBC to the wastegate was almost falling off
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Old Mar 25, 2007 | 04:39 PM
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well i figured out the problem....

the actual AVCR vallve is bad...

time to buy a new one :
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