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Q: When accelerating hard the car revs high but doesn't gain speed. on 2000 Nissan Maxima

When going up a hill or accelerating hard, car revs high but doesn't gain speed for several seconds before taking off as it should.
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I have the same problem and it barely makes it up big hills. It just revs way too high and wont shift up. When driving on flat ground it will rev too high if I give it too much gas and I wont accelerate at all.
How long has your problem been going on with your Pathfinder? I have an 03 as well. Burns through oil like crazy so make sure you constantly check the levels.
If you have an automatic transmission, you'll want to check the transmission fluid level. The owner's manual usually has instructions on this. If the fluid level is OK, more diagnosis will be needed. Does the "S" sport shift light flash a few seconds the next time you start the car?

If you have a manual transmission, the clutch may be slipping or not engaging properly. How many miles are on the car?
It could be a pressure control solenoid or shift solenoid. It could be related to the torque converter as well but it's difficult to say. It could also be that the internal clutch bands are starting to wear. Does the fluid smell burnt? Does this happen at any vehicle speed? Does it happen only in a certain range?
The MAF sensor is an expensive part so you'll want to check the voltages on the sensor leads and ground wire to be sure it's defective. During warm-up conditions, the voltage between the White wire and battery ground should be 1.2 to 1.8V at idle (1.6-2.2V at 2500 rpm). The Red wire should be approximately .5 Volts (only ignition on, engine off), and the Black (ground) wire should be "approximately 0 Volts" (engine idling during warm-up conditions). I've been told .2 millivolts (mV) on the ground wire is enough to affect the ECM reading but not enough to set a check engine light.

Does the feel like the car jerks forward and the rpm's come down when your vehicle speed increases? Does it feel like a slipping transmission? Are you saying that it revs high with no load but is down on power when driving up a hill?
The car is automatic transmission with about 125000 miles. Tranny fluid is at appropriate level. Is there a shift sensor that could be bad?
It happens whether accelarating from a stopped position or at any speed. I have read some other forums that have had similar problems. They all suggest a MAF sensor. Could it be that?
My car is 2)
003 Nissan Pathfinder Jeep with about 170000 miles, the car was not accelerating at all at first, when it was scanned, it sent a fault code P1136 (faulty intake valve timing control bank 2), not it was replaced and it accelerates a bit now but when i engage the gear, it will not accelerate at all, what could be the problem please?
Ougoon, did you figure out what what causing the car to rev high? I have a 2000 max too, and it has the same problem, The car feels like it wants to shift but there is a delay.
Have you tried replacing the MAF sensor? vehicles select the sensors very well, you might be very lucky to get the one that will work very well with your vehicle.
The problem is the shift control computer it needs to be replaced. I found a mechanic that new his stuff. Mechanics will try to rip you off for this by charging you for a bunch of other repairs and never solve the problem which only cost me $200
I owned a Nissan Cefiro 2.5 (Maxima) year 1999. Previously I encountered with slow gear engage and shifting gear with automatic trans. My mechanic suggesting replace the Throttle Position Sensor(TPS). It works fine but I'm still having problems with slipping gear between 2nd and 3rd gear whenever I accelerate hard but works perfectly when smooth driving . The rpm reading will go 6500 rpm but cars not picking up speed. My mechanic suggesting is the ECU for auto trans fault. Recently, I also changed gear position sensor as gear failed to engage when I push it to Reverse. Please advise if anyone encounter this experience
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