Question about 2003 Nissan Primera

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Does the air condition consume more fuel - 2003 Nissan Primera

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I have heard yes & no. When the Ac pump clutch engages, im sure there is more load. resulting in less mpg. But if your having significant variation in mpg. I would pay attention to where i purchase gasoline. There are reports where i live, that the local shell gas, has dropped many owners mpg. I too noticed this. Remember also, your paying for & getting 90% gas, 10 alcohol. if you have 100% gas where you live, i would only use that. Make sure you air filter is clean, you can tap them out, ive even vacumed them clean with a shop vac. make sure oil is change per your manual, its probably every 5000-7500 miles. Use Quality oil, >not jiffy lube.... Get & keep a pressure gauge for your tires, keep them inflated properly, they will wear longer & low tires will affect your mpg negatively

Posted on Apr 19, 2014


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97 Grand am v6 up & down idle. Driving =steady acceleration. I've changed, O2 sensor, throttle positioning sensor. Scan is still saying Random misfires? Get warm won't start.

P0300 Random misfire - lean condition , vacuum leak , low fuel pressure , fuel filter plugged partially , mass air flow sensor .
If the misfire is random, check for the following conditions:
System Grounds: Ensure all connections are clean and properly tightened.

MAF: A Mass Air Flow (MAF) sensor output that causes the PCM to sense a lower than normal air flow will cause a lean condition.

Air Induction System: Air leaks into the induction system which bypass the MAF sensor will cause a lean condition. Check for disconnected or damaged vacuum hoses, incorrectly installed or faulty crankcase ventilation valve, or for vacuum leaks at the throttle body, EGR valve, and intake manifold mounting surfaces.

Fuel Pressure: Perform a fuel system pressure test. A faulty fuel pump, plugged filter, or faulty fuel system pressure regulator will contribute to a lean condition.

Injector(s): Perform injector coil/balance test to locate faulty injector(s) contributing to a lean or flooding condition. In addition to the above test, check the condition of the injector O rings.

EGR: Check for leaking valve, adapter, or feed pipes which will contribute to a lean condition or excessive EGR flow.

Reviewing the Fail Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.

Oct 21, 2015 | Cars & Trucks

1 Answer

My car is consuming too much fuel

Possible but not probable. Depends on how much "too much" fuel consumption to you is, and what other maintenance you have neglected. There are many, many reasons for poor fuel economy. Start with a good tune up then see how the fuel consumption is. Worn shocks may have some effect in that they wheels may often lose contact with the surface, spin excessively and thus, burn more fuel but this isn't a major factor in fuel consumption normally. It's more apt to be one of many other factors going on with your vehicle. Check and/or replace spark plugs, fuel injectors, air filter, PCV, oil & oil filter, and any other items recommended for your vehicle's scheduled maintenance for the mileage your vehicle has.

Apr 09, 2015 | Cars & Trucks

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Which problem do an 1nz engine haavee for it to consume alot of fuel

engine consume lot of fuel.clogged air filter.low tire pressure.faulty emission control device.dirty fuel injectors.heavy foot on accelerator.lot of short stops like driving in the city.running AC will consume gas.high mileage engine low compression assume lots of fuel.slipping transmission.weak ignition.driving up steep grades or mountains burns more fuel.

May 29, 2013 | Cars & Trucks

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Van consuming too much gas

Check the condition of the following:
1) Spark plugs, leads and coil(s)2) Air filter3) Fuel filter4) Exhaust for leaks and catalytic convertor for blockage.5) O2 sensor.

Nov 15, 2012 | 2004 Nissan Quest

1 Answer

What are codes 167 and 042 on diagnostics

167- no change in throttle position sensor range
042- rich condition
...sounds like the throttle position sensor is going bad, unable to measure correct amount fuel per acceleration; sending too much- resulting in a rich (too much fuel) condition.
engine light may begin to flash alerting you that too much fuel consumed at this rate can damage the catalytic converter

Aug 30, 2011 | 2008 Volvo S60

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Hello,i bought a subaru outback 2002 from 3 months.and it's consuming more gas than normal.(130km/20 litre) could you please tell me what i have to change? and what is the normal consumption for this...


Aug 05, 2011 | 2002 Subaru Outback

1 Answer

The rpm of my accent is 1.5, does it consume more fuel

Hi there,

Generally YES.

Most modern engines will idle higher (up to 2000rpm) when starting from cold. As the engine reaches proper operating temperature, the idle should slowly return to around the 700rpm mark (depending on Hyundai's specifications), with no accessories turned on.

If you were to engage an accessory such as Air-conditioning, your engine will then increase its idle speed to compensate for the additional load and to prevent stalling when stopping.

An idle speed of 1.5 (ie 1.500rpm) when engine is hot and parked up, would indicate there is a problem somewhere. This condition will consume unneccessary fuel.

There are many possibilities causing an increase in idle speed.

Have your vehicle diagnostics checked first - this will identify if any sensors/solenoids are not functioning correctly or if there could be possible vacuum leaks. You must do this, before attempting to correct idle speed.


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May 15, 2011 | 1999 Hyundai Accent

2 Answers

My truck is showing codes 171 and 174. Can you help

P0174 Generic Definition

Fuel Trim Bank Two Condition
- The ECM has detected a rich or lean air/fuel ratio condition on engine bank two

Probable Cause[s]

  1. If bank one and two are set together suspect a fuel pressure condition or MAF sensor fault
  2. Failed HO2S21
  3. Ignition misfire condition
  4. Fuel injector problem
  5. Engine mechanical condition

    P0171 Generic Definition

    Fuel trim bank one condition
    - The powertrain control module uses the oxygen sensor to calculate the air/fuel ratio of the engine. The computer has recognized a rich or lean condition on one engine bank only.

    Probable Cause[s]

    1. If bank one and two codes set together suspect fuel pressure or MAF (Mass Air Flow) Sensor
    2. Oxygen sensor defective
    3. Ignition misfire-repair
    4. Fuel injector problem

      Mar 05, 2011 | 1999 Chevrolet Silverado 1500

      2 Answers


      P0174 is SYSTEM LEAN BANK 2. If you do not have any rough running or missfires. Check for any vacumm hoses that may be damaged or loose. Any code that is set on OBDII has to be cleared with code reader. If you have any rough running or mussfires, check fuel injectors for proper operation. If this helps, please rate.

      Apr 30, 2009 | Ford Mustang Cars & Trucks

      1 Answer

      Fuel consumption of my mistubishi galant ss 1990

      Make sure the air filter is clean,make sure the oxygen sensor is ok but would have to suspect its carboned up due to vehicle age ,if not working properly it tells the engine to run richer than normal.Also make sure the plugs and spark plug leads are in good condition.It wouldnt hurt to put a bottle of injector cleaner in the fuel tank next service as dirty injectors will also add to fuel use.A few small things to do or check but worth it by the sound it.

      Oct 20, 2008 | 1990 Mitsubishi Galant

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