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Coughs at 4000rpm
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Old 03 Dec 2010, 11:03 AM   #1 (permalink)
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Coughs at 4000rpm

Hi got a 2000 Impreze it will start fine run fine but when driving down the road at about 4000rpm it will start to cough for a bit when over 4500 it will be fine. Changed Fuel filter Plugs leads and coil pack dose anyone know what else to look at ?
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Old 04 Dec 2010, 03:02 AM   #2 (permalink)
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Location: Cork, Ireland
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Re: Coughs at 4000rpm

does it happen when giving it full boost pedal to the floor or just when revs holding round the 4k rpm? could try cleaning the boost solenoid check for boost leaks any small slits on turbo line pipes and hoses?
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