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cannot hold steady boost low rpms

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Old 02-20-2005, 08:21 AM
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Default cannot hold steady boost low rpms

i have a 98 a4 1.8tq w/ apr chip factory turbo, and during wot below 3000 rpms it boosts up to 1 bar and then it bounces back and forth from 16psi - 5psi. after about 3500 rpms it holds steady. i have a turboxs bpv also. do you know what the problem could be? the hoses have all been replaced to samco hoses.
Old 02-20-2005, 10:36 AM
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my car used to do that. it can be the vac line going to the bpv or the bpv is leaking at high boost
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