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If its chain driven, Could be the timing chain tensioner! Does it also have a rattle driving the vehicle at around 2000 R.P.M?
its a Nissan for starters but it could be the plug wires or the plugs or the distributor
he he he
F8
herspuy43e-0[pytl
I had a 1990 nissan maxima that use to do that and the problem was my rack and pinion bushings were bad
broken timing belt
weak battery or bad alternator.
you have a vacumn leak.
air flow senser not working
usually blue smoke is oil
Get your radiator checked, may have blocked core