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Infiniti engine repair questions and answers

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  • Otto Hernandez
    Otto Hernandez - 2008 Infiniti G37 - Engine - 5 hours ago
    My car has a noise above the accelerator pedal coming from a box that seems to be the driving module. How can I confirm?
    After pass 3000 RPM, a noise starts to come from the box above the accelerator pedal, by research it seems to be a driving module. Can I just replace it? What other problems can this cause? The car doesn't have any warning lights, and the engine light is not one.
     
    0 answer
  • Otto Hernandez
    Otto Hernandez - 2008 Infiniti G37 - Engine - 6 hours ago
    A module driving component is making the noise. How would I confirm that is the problem?
    The noise is when RPM is over 3000, no difference weather the car is cold or hot. It seems to be coming from under the dash, from a white box above the accelerator. The check engine light is not on, and no other warning lights are on. I was thinking of just ...
     
    0 answer
  • Chris
    Chris - 2000 Infiniti I30 - Engine - 9/22/2014
    Why does my driver side radiator fan stay on even when the key is off.
    This happens even when the car has not been started. There is no check engine light.
     
    • RickTheShadeTreeMechanic
      You likely have a short in the wiring. These can be hard to find, but follow the wiring back from the fan and see if the coating is worn through, letting the wires make contact where they shouldn't be. This can be an easy fix with electrical tape if you find the problem.
  • infinity i-30
    infinity i-30 - 1997 Infiniti I30 - Engine - 9/22/2014
    Infinity i-30 cruises great..replaced ignition coils..and plugs...idles great.....after heating up...wont come off the..
    Wont come off the line....doesnt die...but doesnt go.....easing out on gas pedal, slowly picks up after a while and goes.......any idea...? Fuel pressure? Tps?
     
    • Jimm
      9/22/2014 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • Pete                            Palazzolo
    Pete Palazzolo - 2000 Infiniti I30 - Engine - 8/24/2014
    Code indicates 3 way catalist when checking hat does it mean?
    240,000 miles. check engine light came on after 100 mile trip, then after awhile it went off again. A few days later it comes back on. Car runs good except for a tapping sound near the housing for the timing chain.
     
    0 answer
  • Pete                            Palazzolo
    Pete Palazzolo - 2000 Infiniti I30 - Engine - 8/23/2014
    Check engine light is on
    tester shows check 3 way catalist. what does it mean?
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1999 Infiniti Q45 - Engine - 7/30/2014
    Car quit running almost certain its electrical
    I cranked the car and after about 30 seconds, it quit running. It will turn over but the dash lights do not come on, also the windows will not roll down but the door locks work. I have checked the fuses inside pretty good. I looked at the ones under the hood but ...
     
    0 answer
  • Cindy
    Cindy - 1996 Infiniti G20 - Engine - 7/8/2014
    WHAT CAP AM I MISSING????
    Ok so here the big problem; I'm missing some sort of "Cap" that's located near the left side of my engine. It's not engine oil cap nor the cap that you put anti freeze in. So what could the name of that cap i'm missing be??.. Please any info could be really helpful! ...
     
    • AutoMD Member
      7/8/2014 AutoMD Member
      Could possibly be the black cap to the power steering reservoir or one of the two yellow caps which go to the coolant reservoir or windshield washer reservoir.
  • AutoMD Member
    AutoMD Member - 2001 Infiniti QX4 - Engine - 7/4/2014
    My truck won't start, and I'm now at a loss as to why
    Last Thursday my truck completely stopped starting. For roughly 2 weeks before that, it was idling slow and stalling, given the indication it was a few different problems. I have replaced the fuel pump, 2 cam shaft sensor, 2 crank shaft sensor, all 2 ignition ...
     
  • AutoMD Member
    AutoMD Member - 2006 Infiniti G35 - Engine - 7/2/2014
    Check Engine Light came on and car stated jerking.
    Miles: 117,300; I filled with Cheveron premium on way home. The check engine light came on and the car started jerking. Jerking sensation felt upon accelaration from a stop. Eased on the gas pedal and car then felt ok, but then pushed the gas some more and the ...
     
    0 answer
  • Cindy
    Cindy - 1996 Infiniti G20 - Engine - 6/3/2014
    WHAT CAP AM I MISSING????
    Ok so here the big problem; I'm missing some sort of "Cap" that's located near the left side of my engine. It's not engine oil cap nor the cap that you put anti freeze in. So what could the name of that cap i'm missing be??.. Please any info could be really helpful! ...
     
    0 answer
  • AutoMD Member
    AutoMD Member - 1991 Infiniti M30 - Engine - 6/2/2014
    What could be the causes for my 1991 Infiniti M30 to keep stalling out on me??
    I thought it might be the fuel system and replaced the fuel filter and pump. But it keeps happening. What could be other causes??
     
    • GT500Knights
      5/10/2014 GT500Knights
      First step is to check for any diagnostic codes. Those, even on your vehicle, may help us.

      When does the stalling occur? Describe as best you can when the stalling happens. Details to pay attention to are:
      a. Weather
      b. Hot or cold engine
      c. Speed
      d. Load - How far was your foot on the throttle?
      e. Incline - Were you driving uphill?
      f. Does this occur when you release the throttle?
      g. Maintenance history, along with anything noteworthy and recent
      h. Other problems that may possibly be related such as poor gas mileage or excessively high idle
      GT500Knights
      5/10/2014 AutoMD Member
      Speed where I live 35mph. my foot is just normal on the pedal. flat driving. no I am on the throttle driving normal and it sputters a few times then dies. I put it in N and withing 30 sec I can start it up again. Have had the car for 5 years do everything maint regularly every 3 mths put in a full tank of top notch gas. every 6 months 1 can of seafoam
    • CVO
      5/10/2014 CVO
      Is this vehicle has a check engine lights ?

      Infiniti is the top end vehicle made by Nissan Corporation that first came out in 1990.( Not sure ) if the diagnosing of the Infiniti check engine light codes is basically the same way like most Nissan vehicles.

      Nissan vehicles 1984-94 obd1 code retrieval. See this url instructions to extract the fault codes.

      http://www.extreme-check-engine-light-codes.com...
    • GT500Knights
      5/10/2014 GT500Knights
      Now, when you say top notch gas, do you mean to say you're running 91 octane rated gasoline? If your car is meant to run on 87 or 89, running the incorrect octane can cause engine damage. Particularly to spark plugs and injectors, as well as the intake and exhaust valves. Deposits can be left inside these parts. I would suggest running a can of seafoam through the intake vacuum. The seafoam bottle has instructors for that specific method. I understand you mentioned you had already used seafoam, but is that only in the gas tank? An upper cylinder cleaning might be in order. I would also take a look at the egr valve for functionality. It is supposed to operate during cruising. If it is allowing too much exhaust that might be an issue. Check exhaust back-pressure and hook up a vacuum gauge to see how the needle responds. You can find a guide online on how to read vacuum gauges.
      GT500Knights
      5/10/2014 AutoMD Member
      the erg valve has a little hose on the top when I took that off there was nothing. I know it is meant to be functional when moving but is there supposed to be a vacumn when I put my finger on the hose or not? if the car is in park?? I will do the sea foam as you mentioned too and see what happened. Someone also told me to change out the temp sensor??? Good idea or not?
    • GT500Knights
      5/10/2014 GT500Knights
      Temp sensor might be an issue. Hook a dvom to it to read ohms and measure it's resistance when it's cold and when it's hot. Specifications vary per car but once you get the readings I can provide a chart related to the ect sensor. As for the egr, no it should not have any vacuum to it when in park to check its functionality, attach a vacuum pump to the egr valve where you pulled off that vacuum hose. When you apply some vacuum it should cause some engine stumbling. If you apply a lot of vacuum it should cause the engine to stall out. This is a good thing.
    • AutoMD Member
      6/2/2014 AutoMD Member
      Maybe the mechanic didnt actually replace the fuel pump. I would have it checked out by another mechanic.
  • AutoMD Member
    AutoMD Member - 2003 Infiniti M45 - Engine - 6/2/2014
    Sudden jerking with no warning
    In Feb 2014 the dealership replaced the engine control module (ECM) on my car. The problem i was having was that over a period of time (very sporadic) the car would jerk; it was a type of jerking sensation that led me to believe that I had my foot in the wrong ...
     
    • Chevy doctor
      5/14/2014 Chevy doctor
      Several problems can cause a jerking sensation. Cylinder misfires like bad plugs, wires or coils can cause this. Even a faulty injector. It could be transmission related like your torque converter. Pay attention if it happens only of speeds above 40 or at a certain rpm under a load. Sounds like a cylinder misfire to me.
      Chevy doctor
      5/15/2014 AutoMD Member
      Thank you Chevy doctor, I will pay attention to that.
    • AutoMD Member
      6/2/2014 AutoMD Member
      fuel pump.
      AutoMD Member
      6/2/2014 AutoMD Member
      Thanks for chiming in. They (dealership) replaced the throttle chamber and had to replace the ECM again. The faulty throttle chamber caused the new ECM to go bad; I didn't pay for ECM replacement second time around. So far so good....
  • AutoMD Member
    AutoMD Member - 1999 Infiniti I30 - Engine - 5/31/2014
    My car has starting problem. Saturday it did not started.
    All light were good. Sinday morning it works fine. Since last 2 month i hear funny sound when i start early morning . Is this starter problem/
     
    • HouseCallAuto
      3/31/2014 HouseCallAuto
      More detail, too vague.
    • Pepe
      4/1/2014 Pepe
      Will the engine turn over at all? Be more specific.
    • AutoMD Member
      5/31/2014 AutoMD Member
      probably the starter, yes. I'm 57 and not a mechanic but I have learned a few things. Generally , a startig problem is either the battery or the starter. the battery is usually what it is. If it's good, then it could be the starter. If battery is new and still not staying charged then it's the alternator. so those three things.
  • AutoMD Member
    AutoMD Member - 1999 Infiniti I30 - Engine - 5/31/2014
    Saturday evening i could not start my car. gave ignition key, but no result. head lamp works fine, so no battery issue
    Since last two month, early morning during my first start, it give me high pitch huming sound. Sunday morning i tried to start and it works. This morning it starts and works fine. What is problem? Any starter issue or something else. Thanks
     
    • HouseCallAuto
      3/31/2014 HouseCallAuto
      Sounds like the starter
    • Pepe
      4/1/2014 Pepe
      Could be a bad starter or a bad connection from battery to the starter.
    • AutoMD Member
      5/31/2014 AutoMD Member
      check that fuel is coming out the fuel filter (disconnect one hose and then crank engine to see). A buddy helps. do this, if the engine is cranking but not starting and running on its own. If engine is not cranking (no movement) then yes, the starter.