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focus rs boost drop at 4500 revs

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Old 27-01-2011, 05:39 PM
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fezzy240bhp
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Default focus rs boost drop at 4500 revs
been on rolling road today after remap and uprated acutator everything was going fine until 4500 revs then a little cough then the boost went from holding 18 psi to gradually dropping below 10 and staying there just wondered if it cud be the boost soleinoid or map sensor annoying to say the least
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Old 28-01-2011, 12:14 PM
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help ha
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Old 28-01-2011, 12:49 PM
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chaffe
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can you not disconnect the boost control valve and use a bleed valve to stabilize the boost?
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Old 28-01-2011, 03:26 PM
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staying away from bleed valves haha just wondered what the problem was
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Old 28-01-2011, 04:17 PM
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ive only just got myself a FRS but im pretty sure that the AF map has a flat spot at 4500rpm.
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