Pulsing under acceleration

[PhopsonNY]

Hi... I have a 1990 auto 240 hatch. vin JN1HS36P7LW121468 with milage at 125k

Car is stock except for the Injen CAI and Magnecor ignition wires.

I notice that when I accelerate in 2nd gear the engine seems to pulse. Instead of a steady increase in spead, there seems to be a decrease in power and the engine pulses. I ususally have to accelerate hard to avoid this. I am guessing that maybe my transmission is going as every time it shifts, there is a noticable lurch in the car.

Any ideas about what could be causing this.

Also when in neutral the engine seems to idle at about 1k when it has warmed up. I have backed off the idle adjuster to the minimum. In gear with my foot on the break, it idles at about 700rpm.
Modified by PhopsonNY at 12:01 AM 2/12/2005

[s13sr20chris]

only happens in econd gear? that sounds like shift shudder. prob a mechanical condition. need to have pressures tested at trans.

[PhopsonNY]

Turned out to need a new O2 sensor.

This is old, but I like to post solutions to problems to help others.