My son has bought a Golf GTI 1991 with digifant fuel injection.When it is returning back to idle the revs drop below normal for a moment sometimes causing it to stall, any tips or clues on how we can remedy this please thanks tonyh
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Clean out the idle control valve with carb cleaner.
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............and the throttle disc and venturi. If the oil is really old and fumy this won't help either.
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Check the idle valve or the throttle valve switch. I had a similiar problem on a passat a couple of years ago and it turned out to be the throttle valve switch.
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Many thanks for the very helpfull replies, we cleaned the I.S.C.V,throttle body and the idle jet [it was covered in a tar like substance] and the car is now performing OK tonyh
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