Altima 96 stumbles on acceleration

Try cleaning the throttle body.

I think the EGR will throw a code if its unhappy. It does on other '96 Nissans. How about the vacuum hoses that operate it? Old, cracked, loose, etc?

Did you use a factory O2 sensor? If aftermarket, it might not be exactly right. It will throw a code if its really out, but maybe not if its just marginally off.

Our 240sx (basically the same engine) has done this a few of times over the years. One time, the O2 sensor was causing it, one time it was plug wires & worn cap/rotor, one time it was dirty throttle intake, and most recently, it occurred after driving in a major rain storm. Opening, cleaning, and resealing all the electrical connectors around the front and sides of the engine - basically everything that might've gotten wet, cured it.

Thans for the Ideas. The EGR and hoses tested fine but still not sure about EGR temp sensor, it did not measure correctly.

The O2 sensor is after market and had hard time to f> >

I've read down the thread, and while it sounds like the things folks have recommended or you've done, you might just have a look at the crank angle sensor to see if it has a small amount of oil getting in there. I know you've checked the rotor and cap - but not sure you checked this part. My '94 quit totally when hot from oil getting past the seal, but a friend's '95 was intermittent for almost six weeks while the small shop changed a lot of other parts. good luck.