How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask indy-tech Your Own Question

indy-tech
indy-tech, Import tech
Category: Nissan
Satisfied Customers: 6914
Experience:  Import technician
29331485
Type Your Nissan Question Here...
indy-tech is online now

QBR reader put "Misfire all cylinders Plugs, Injectors, Coils"

Resolved Question:

QBR reader put "Misfire all cylinders Plugs, Injectors, Coils" we have changed coils and plugs plus put cleaner in injectors but are still getting misfire when accelerating.
Submitted: 1 year ago.
Category: Nissan
Expert:  indy-tech replied 1 year ago.
Hi .
Still need assistance with this issue ??
What codes did you get just the one P0300 ,if any other please let me know.
Spark plugs ,all injectors, Coils, (New)
Any other test done .
Customer: replied 1 year ago.

the error code was P9*** "fault either injectors, coils, plugs" .

We have put new plugs, coils and cleaned injectors we do notice that it seems to happen more when on low fuel.

Expert:  indy-tech replied 1 year ago.
Hi Maurice .
See if you can get me the complete code so i can investigate this for you.
Greg
Customer: replied 1 year ago.

found out the code is P0300, which is generic to Nissan for they don't know. After much testing with on board obd2 scanners the garage has said one thing ECU unit faulty, but as one is worth more than the car i.

Expert:  indy-tech replied 1 year ago.
Hi Maurice .

What plugs do you have fitted ,if Bosch replace with NGK.

What Causes a P0300 Code?
  • Low Fuel Pressure
  • Vacuum Leak
  • EGR system malfunction
  • Internal Engine Problems (such as low compression)

Less Common Causes
  • Faulty Coil
  • Faulty Spark Plugs and/or Wires
  • Camshaft or Crankshaft sensors
  • Ignition module
  • Computer

First do a fuel pressure test and if found good do a cylinder leak down test .

Then any vacuum leaks should be checked ,if st fuel trim is +10 and over manifold leak .

EGR system also a typical problem to cause a P0300 code .

Engine condition check that cylinder compression is above 8bars and all even .

NOW IF YOU HAVE HIGH MILEAGE .


The most common issue for this engine to set a P0300 code is the timing chain has slightly streached and will need replacing ,if on start up you hear a slight engine chain rattle then this is your problem .

Check the above and if needed please get back to me with the reply button, and not the poor or bad service, this way i can get back to you or suggest another expert if needed.

Your deposit does not pay me until the answer is rated in a positive way,
Not rating or a bad rating does not constitute a refund.

If you are not happy or you have sorted out your problem before the answer then please let me know with the reply button .

Kind regards Greg.

indy-tech, Import tech
Category: Nissan
Satisfied Customers: 6914
Experience: Import technician
indy-tech and other Nissan Specialists are ready to help you

What Customers are Saying:

 
 
 
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
< Previous | Next >
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C.
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex
 
 
 

Meet The Experts:

 
 
 
  • Jake

    Jake

    Nissan Technician

    Satisfied Customers:

    225
    Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.
< Previous | Next >
  • http://ww2.justanswer.com/uploads/05/05muranosl/2012-1-26_195212_JA.64x64.JPG Jake's Avatar

    Jake

    Nissan Technician

    Satisfied Customers:

    225
    Experienced collision repair technician, Pulaski Tech graduate and DSM hobbyist.
  • http://ww2.justanswer.com/uploads/FO/fordtwo/2014-12-19_163422_arrepair.64x64.jpg Robert's Avatar

    Robert

    UK Qualified Car Technician

    Satisfied Customers:

    84
    self employed in the motor repair buisness 19years
  • http://ww2.justanswer.com/uploads/IN/indytech/2013-8-8_102717_SantoDomingo146598x6402.64x64.jpg indy-tech's Avatar

    indy-tech

    Import tech

    Satisfied Customers:

    78
    Import technician
  • http://ww2.justanswer.com/uploads/35/350matt/2012-6-7_182356_matsavatr.64x64.jpg Matt's Avatar

    Matt

    Mechanical Engineer

    Satisfied Customers:

    4582
    BEng hons Mech engineering, in auto industry 22 years
  • http://ww2.justanswer.com/uploads/TE/techmachine/0601821347169_717372168_8940977_39623330_o.64x64.jpg Ross's Avatar

    Ross

    Diagnostic and repair technician

    Satisfied Customers:

    467
    Licensed diagnostic and repair technician
  • http://ww2.justanswer.com/uploads/RO/RobMechanic/068.64x64.JPG Rob's Avatar

    Rob

    ASE Certified Technician

    Satisfied Customers:

    82
    30 years trade experience