2000 Nissan Maxima SE bogs down at higher speeds?

Question

*re-asking because I screwed up my last one with edit, new at this*

It runs fine at lower RPMs, but when you try to accelerate it really bogs down and has a hard time.

-There is no engine light on
-No error codes were found on ECM
-I changed the Fuel pump and fuel pump filter
-The spark plugs and wires are fine
-Used Fuel Injector cleaner, but problem still exists

Thank you in advance for any help you can give.

For testing the Air flow meter, can this be done with a volt/amp meter at my home or will I have to go elsewhere?

Answer 1

Ok in data monotor look at the airflow meter voltage. Floor the throttle and your voltage needs to make it above 4 volts. I don't know why some Maximas kick a lean code p0171 and others that run sick do not. Buy a new Nissan remanfactured AFM leave the tube unscrew the sensor pull it out and transfer the new AFM's sensor to your air filter tube. There is also some Nissan Maximas that benefit from a new computer reprogram. AMF alone will give you back the power your missing. Some times customers get so used to the -20 hp and now the car spins the tires going into second again