[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: 4kq doesn't like to rev

PN writes:
> My 87 4kq doesn't like to rev much above 4000 rpm. Around 4200 in any gear 
> it will really stop pulling, and will continue to rev only with a lot of 
> encouragement.  I rarely rev it this high, but sometimes it's nice to be 
> able to get going. Below 4k rpm it's totally happy.

Some possible causes: insufficient fuel (blocked fuel filter(s), weak fuel
pump, mal-adjusted fuel injection), blocked flow in intake or
exhaust (mal-adjusted throttle cable, blocked catalytic convertor or
muffler(s)), wrong fuel pump relay (4-cylinder unit used in 5-cylinder car),
vacuum leaks (check big air boot and all vacuum hoses).

96 A4 2.8 quattro
84 5000S 2.1 turbo
80 4000 2.0
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti@amb.org
 //////  http://metalab.unc.edu/tkan/