1994 Nissan Altima

jehrc · Posted at Mon Sep 01, 2008 3:04 pm

Engine Performance problem
1994 Nissan Altima 4 cyl Front Wheel Drive Automatic 234000 miles
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According to computer code, I replaced the knock sensor.That code is cleared now and computer is reading good. However, the car still runs rough and has died on my wife. Have I missed something or does the system need to run longer to straighten out?

mhpautos · Posted at Mon Sep 01, 2008 4:27 pm

Hi there,

The knock sensor is just one part of the engine management system, if you have no codes set, i would be doing a general tune up plugs, leads if old, fuel & air filters and have a run on an oscilloscope as this will identify any ignition problem that may be causing your fault.Start here.

mark (mhpautos)