Check air intake hose for cracks (from air filter / MAF to throttle body).
When removing for inspection, take care not to make it worse - don't pull the hose! Instead start the oppposite way - by pushing it over!
Had similar issue and found cracks on my 2001 almera.
As the car / engine accelerates, it changes relative position slightly and opens up the cracks which distrubs MAF & ECU.
Have temporarilly fixed it with self amalgamating tape.
When removing for inspection, take care not to make it worse - don't pull the hose! Instead start the oppposite way - by pushing it over!
Had similar issue and found cracks on my 2001 almera.
As the car / engine accelerates, it changes relative position slightly and opens up the cracks which distrubs MAF & ECU.
Have temporarilly fixed it with self amalgamating tape.