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Hi all, Nissan Primera, P12, 2002 is over revving, especially when idling. Sprayed the MAF sensor and changed the air filter but that didn't make any difference. It also uses lots of petrol sinc

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  • 373 Answers

Sounds like a vacuum leak or a bad intake manifold gasket. Take engine cleaner and spray the gasket where the intake manifold bolts onto the motor while running. If there is any change in the idle, your gasket needs to be replaced. Spray all vacuum hoses too. This is the best and cheapest way to test. Let me know how you do please

Posted on Jan 20, 2013

Testimonial: "Advice was specific and spot on and we didn't need any "specialist" equipment to try what Jamien1416 suggested. (we were lucky enough for a mate to be able to pressure test for us as well)."

  • Matatarian Jan 22, 2013

    Hi, yep, Had it pressure tested. Apparently there's a leak where the head gasket meets the inlet manifold gasket. Thanks for your help : )

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Posted on Jan 02, 2017

  • 3640 Answers

SOURCE: rough idle hesitating at idle drives fine i

check plugs, wires, and coils for proper spark.

Posted on Oct 29, 2009

SOURCE: 2003 GMC Sierra Has recently developed

You never replace anything, on a Wishing,Hoping,Pushing,Poking,diagnostic approach

You learn the vehicles Systems,Test,then Replace,if you have a failed component.

Work on the Misfire Issues.
Then you lean O2 Codes will go away.

Not a the plugs.

Think lean---Vacuum leaks,EGR Valve leak,EVAP System leaks,anything with a hose that lets air into the intake system.
Exhaust System leaks,near sensors

Posted on Nov 24, 2010

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2 Answers

Shifting from drive to neutral rpm remains high


Take it to a qualified repair shop , Thinking ??? Also was thinking the MAF sensor or Intake Air sensor might be faulty . TESTING IS THE WAY TO A PROPER FIX !!!!!

Apr 04, 2017 | 2006 Saturn Vue

1 Answer

The car shakes when idle and upon acceleration and deceleration.


it may be the maf / mass,air flow sensor it is located on the air intake duct at the air filter housing you can get a manual and check the volts at the (MAF)sensor to see if its good and the TSP can cause this to and you can test it the same way with a voltmeter i think the tps is 5.0 volts.. at idle the (MAF) should be between 1.3 and 1.7 when motor is revved to 4,000 rpm the voltage should be increased to 4.0 and when stopped it should be less then 1.0 volts .so test the sensors before you buy any parts cause most auto stores want let you return ELE. items

Sep 27, 2011 | 1999 Nissan Maxima

1 Answer

2000 infiniti QX4 3.3L (engine has a distributer) stalls out especially when revved from idle. Also won't start or very difficult to start, haven't been able to get it to start for a couple days...


pull one ignition cable out of cap just enough to see the tip of connector and crank it, a spark should jump from cap to tip of wire. no spark means you need the whole distributor replaced. buy it from nissan or infiniti dealer, it comes with cap rotor installed and 12 mo 12k mile warranty, no matter who installs it. dont waste time with aftermarket rebuilt distributor, those are not reliable. https://parts.infinitiusa.com/

Apr 06, 2017 | Infiniti QX4 Cars & Trucks

2 Answers

I have a 5 speed 90 nissan 300zx non turbo, been having trouble starting even after sitting for a while warmed up, idles almost like I'm barely giving it gas, after changing air flow sensor, new ngk...


do you have spark? have you checked any of your sensors like crank sensor or cam sensor you said you small fuel I would do a fuel pressure test, befor you put a fuel pump in. please let me know if this helped i could have you do few more tests if needed

stockam auto

Jul 06, 2011 | 1990 Nissan 300ZX

2 Answers

Replaced mass air flow sensor, fuel filter, air filter, plugs, wires, cap and rotor. Truck would not go past 2500 RPM before I installed new maf sensor. Now it wont idle when stopped. Runs fine down the...


Make sure there are no vacuum leaks around the mass air flow sensor. If it won't idle when stopped, change the Idle Air Control Valve. Reset the ECU module by removing the negative battery terminal and leave it aside for ten minutes and then reconnect it.

Jun 23, 2011 | 1997 Nissan Pickup

1 Answer

Why does my car throw the code P0100 and P0325? I have a 1995 Nissan 240sx. and it has a random misfire once in a while.


Hi,

Often a single issue can trigger multiple diagnostics codes, especially if the circuits are closely related.

Code P0100 = Mass Air Flow (MAF) Circuit malfunction

The computer has detected an issue with the MAF sensor.

- Verify the MAF sensor wiring is connected and wiring is in good condition
- Unplug and reconnect the MAF harness
- Check that voltage to the MAF sensor is within factory spec


Code P0325 = Knock Sensor # 1 Circuit malfunction

A knock sensor tells the engine computer when one or more of your engine's cylinders are "knocking", that is, exploding the air/fuel mixture in a way that delivers less power and can be damaging to the engine if prolonged. The computer uses this information to tune the engine so that it doesn't knock. If your knock sensor wasn't operating properly, so that it was always indicating a knock, the engine computer's response may have been to change the ignition timing on your engine. Knock sensors generally bolt into or thread into the engine block.

- Check condition of the knock sensor wiring.
- Test the 'Ohms' reading of your Knock Sensor (undo the connector and measure the pins) to ensure it is within spec (ask Nissan for this measurement). If out of spec, replace the knock sensor.

Cheers,


"If this solution resolves your issue, please be kind enough to leave a testimonial"


Jun 08, 2011 | Nissan 240SX Cars & Trucks

1 Answer

HI I hava a '91 Primera 1.6 throttle body


Try looking at your IAC (idle air control valve) (should be attached to your throttle body), also look at your vaccume hoses and attachments for dry rot, cracks, leaks, look at oxygen sensors (unplug and check if sending power when engine is running (most of the time between 6-12 volts is good, fluctuation in signal is normal) check your MAF (Mass Air Flow Sensor) to see if the grid inside is dirty, or if the wiring harness is corroded, cracked, pinched, or anything that is prohibiting sending power back to your main computer. there is more in depth things you can check but these are the basics for your type of problem, keep me updated and good luck.

Hope this helps!
                       Joe.

Mar 13, 2010 | 1991 Nissan Pathfinder

1 Answer

1999 rough idle/hesitating at idle .drives fine i


Yes it could be a vacuum leak at the intake manifold, could also be the MAF sensor (especially if you use a gauze/oil air filter).

Oct 25, 2009 | 2003 Ford E250

1 Answer

Poor idle, power loss off idle then takes off if you give it more throttle like a quarter more pedal, engine code says bank 2 is to lean


You need a new MAF (mass air flow sensor or air flow meter as its called). and you will also need a new air filter, since you most likely used aftermarket one and that's what killed that MAF sensor/meter. Aftermarket air filters dont sit right in the box and are not oil soaked, which helps to catch any debris and dirt coming into your engine. Replace you air filter with Nissan filter and install a new MAF/air flow meter. If your air box is dirty, clean that out too. MAF sensor will run you about $500 and the air filter about $17. Common problem on a Sentra if you are not using Nissan air filter.

Aug 02, 2008 | 2002 Nissan Sentra

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