2002 Nissan Altima Engine seems to 'strain' during freeway

MAVERICK74

MEMBER
2002 NISSAN ALTIMA
4 CYL
4WD
AUTOMATIC
10,500 MILES

Hi, wondering what the problem is with my engine
Overall the car seems to have less 'guts', and it seems as if I have to push the gas pedal in farther to get it to go. At freeway speeds I hear a louder, almost whirring noise and the car seems as if it's not shifting into 5th. Any ideas what the cause might be?

Thanks very much.

Friday, June 4th, 2010 AT 6:07 PM

1 Reply

RASMATAZ

MECHANIC
75,992 POSTS

Lack of acceleration, chugging, hesitating, bogging etc. Could be caused by one of the following below.

Inspect and test all the following listed below:

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
False air leakage.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard.

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Friday, June 4th, 2010 AT 6:26 PM