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 Ron Your Own Question
Ron
Ron, ASE Certified Technician
Category: Infiniti
Satisfied Customers: 35819
Experience:  35 year as a ASE Tech
7276279
Type Your Infiniti Question Here...
Ron is online now
A new question is answered every 9 seconds

Ron, one thing I did read up online was the potential root

Customer Question

Ron, one thing I did read up online was the potential root causes of each of the tests: HC, CO, and NO. My car passed with flying colors for the CO and NO, scoring well below the limit. Would this mean that my car is not running too rich on the fuel mixture? Can that be eliminated? In addition to the fuel injectors, could it also be a distributor cap? Just trying to eliminate possibilities since my CO and NO are good. Thanks.
Submitted: 1 year ago.
Category: Infiniti
Expert:  Ron replied 1 year ago.

Hello and thank you for your question,

High hydro carbon reading are in most cases due to a higher amount of fuel being unburned and in your cases it very minimal. CO reading being high would indicate a rich condition. Since your CO reading are well with in specs you are not running rich. If the spark plug and cap as well as the spark plugs have not been changed the last 30 to 40,000 miles then I would go ahead and doe this as well as having the injector cleaned and you should be ine.