Question about 2000 Nissan Maxima

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I have hesitation when I step on the gas.

Is the "air flow meter" the same thing as the mass air flow sensor?

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Yes you are refering to the same component (located close to the air filter and housing ). and from what little information you
discribe it is posible its faulty due to air filter not replaced often.

Posted on Aug 27, 2008

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My 95 toyota tacoma, hesitates during acceleration around 2500 then takes off strong, it a 5 speed


You should know that while those problems can be caused by several issues, including low quality or altered fuel or even a loosely tighten fuel cap, the most common cause is a dirty MAF flow meter sensor.
The MAF sensor (Mass Air Flow Meter Sensor) is in charge of detecting how much air (in mass, not volume) is coming in to the engine, so the ecm computer can calculate the amount of fuel to be injected.
Some times this sensor gets contaminated by lots of microscopic debris that scape the air filter and accumulate on its sensing parts over time. The resulting effect is that the MAF flow meter sensor gets less "sensible" and detects less air than it is currently entering the engine. The reaction of the ecm computer will be to inject less fuel to keep the air fuel balance, taking as reference the false reading of the MAF flow meter sensor. This will produce a too-lean mixture, which is responsible of the hesitation, the loss in power and the check engine light.
If your car engine, besides the hesitation, is also producing knocking or engine pinging at high loads, like when going up through a hill, it is attributed to this too-lean condition.
Before going to an auto parts store or to a mechanic to fix the problem, you should try fixing it your self. If the problem is a dirty MAF flow meter sensor, the solution is to clean it, plain and simple. That may save you some money that a mechanic will charge for cleaning it (you could do the same) or for replacing the part when most of the times it is not damaged, just dirty or contaminated.

Sep 17, 2012 | Buick Cars & Trucks

1 Answer

No power jucking but can drive throw it is it the air mass meter !!!!


Your description, I venture has a number of things misspelle by accident. "Jucking" Maybe "Jerking?" But you can drive "throw" as though" it is the air mass meter.
Keep in mind, I am not making fun of you, I have made my share of misspelled words and sentances which were a little confusing.
As for the mass air flow sensor, looking at technical service bulletins, there is one which pertains to the throttle position sensor, Air Idle Contril Valve and the Mass Air Flow Meter. They reference connections which need to be checked and insured that they are clean. These can cause a balk or hesitation and stumble. False air problems can also caise the same conditions. Look for vacuum leaks. The main hose which connects the air mass meter to the throttle body may have a crack or tear in it. As you apply throttle, the engine is going the jump and shift position a little. This can cause a small to massive air leak between the air mass sensor and the throttle body. Un metered air means poor performance.

Aug 07, 2011 | 2002 Kia Sportage

3 Answers

Hesitation when I step on the gas


The tps or throttle position sensor could be getting flaky, but without a code I don't know if this is the case.

The map sensor if equipped could be giving false manifold readings.

The mass air flow sensor could be bad if so equipped.

I'd be guessing without more data.

Jul 06, 2010 | 1995 Chevrolet Cavalier

1 Answer

My 2005 Sante Fe hesitates and won't get up to speed whenever it is damp or rainy outside. What causes this? Thanks


It could be your MAF (Mass Air Flow) sensor. Do you have any SEL {Service Engine) light coming on?

A mass air flow sensor is used to find out the mass of air entering a fuel-injected internal combustion engine. The air mass information is necessary for the engine control unit (ECU) to balance and deliver the correct fuel mass to the engine. Air changes its density as it expands and contracts with temperature and pressure. In automotive applications, air density varies with the ambient temperature, altitude and use of a turbocharger and this is an ideal application for a mass sensor. (See stoichiometry and ideal gas law.)
There are two common types of mass airflow sensors in usage on automotive engines. These are the vane meter and the hot wire. Neither design employs technology that measures air mass directly. However, with an additional sensor or two, the engine's air mass flow rate can be accurately determined.
Both approaches are used almost exclusively on electronic fuel injection (EFI) engines. Both sensor designs output a 0.0- 5.0 volt or a pulse-width modulation (PWM) signal that is proportional to the air mass flow rate, and both sensors have an intake air temperature (IAT) sensor incorporated into their housings.
When a MAF is used in conjunction with an oxygen sensor, the engine's air/fuel ratio can be controlled very accurately. The MAF sensor provides the open-loop predicted air flow information (the measured air flow) to the ECU, and the oxygen sensor provides closed-loop feedback in order to make minor corrections to the predicted air mass.

May 27, 2010 | 2006 Hyundai Santa Fe

4 Answers

2009 toyota corolla hesitates when accelerating. when acceleration in normal speeds, there is a delay of about 4-5 seconds in hesitating during acceleration. no engine lights are on at all. has about...


If you own a 2004, 2005, 2006 or 2007 Toyota Corolla and your car hesitates when you accelerate or it hesitates when driving, you should try the solution described here. Below is a list of the behavior your car may show that tells that you should try this procedure before going to a mechanic or repair shop.
  • The accelerator is slightly pressed while the car is running and it slightly jitters or hesitates
  • After completely stopping the car (a red light for example), it hesitates when you accelerate to continue driving
  • Engine power is below the usual level
  • Sometimes check engine light turns on
You should know that while those problems can be caused by several issues, including low quality or altered fuel or even a loosely tighten fuel cap, the most common cause is a dirty MAF flow meter sensor.
The MAF sensor (Mass Air Flow Meter Sensor) is in charge of detecting how much air (in mass, not volume) is coming in to the engine, so the ecm computer can calculate the amount of fuel to be injected.
Some times this sensor gets contaminated by lots of microscopic debris that scape the air filter and accumulate on its sensing parts over time. The resulting effect is that the MAF flow meter sensor gets less "sensible" and detects less air than it is currently entering the engine. The reaction of the ecm computer will be to inject less fuel to keep the air fuel balance, taking as reference the false reading of the MAF flow meter sensor. This will produce a too-lean mixture, which is responsible of the hesitation, the loss in power and the check engine light.
If your car engine, besides the hesitation, is also producing knocking or engine pinging at high loads, like when going up through a hill, it is attributed to this too-lean condition.
Before going to an auto parts store or to a mechanic to fix the problem, you should try fixing it your self. If the problem is a dirty MAF flow meter sensor, the solution is to clean it, plain and simple. That may save you some money that a mechanic will charge for cleaning it (you could do the same) or for replacing the part when most of the times it is not damaged, just dirty or contaminated

Apr 06, 2010 | 2009 Toyota Corolla

3 Answers

Bmw 3.0 x5 hesitation problems


sound like throttle position sensor.have it check out.also check air duct connected to mass air flow sensor and throttle body.if air duct is loose or off.it will cause severe hesitation.

Jul 21, 2009 | 2009 BMW X5

2 Answers

Perfect Idle, no Codes, but stepping on gas causes hesitation


i would try cleaning mass air sensor, its mounted in air duct between air filter and throttle body, they sell the cleaner at auto parts stores, also as stated bofore make sure the intake pipe clamps are tight and it's not cracked, if that doen't fix it i would investigate a fuel pressure problem either a weak pump or problem with regulator

May 24, 2009 | 1999 Subaru Forester

1 Answer

My 2000 Yukon engine hesitate


Chk MAF sensor (mass air flow) first sensor in ducting coming out of air filter.

* Use only one foot on the gas peddle - Just teasing. :)

May 22, 2009 | 2000 GMC Yukon

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