5.0 and 4.6 Firing Orders

Firing Orders - If you don't think you can do this yourself, bring it to a mechanic who can.

Notice: http://www.fordmustangcar.com assumes no responsibility for any damage you do to your car or to yourself while working on your car. You work on your car at your own risk. If you don't think you can do this yourself, bring it to a mechanic who can. Any modifications, repairs or maintenance can be very dangerous, so be careful!

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  • Ford says that 11,000 customers have already ordered the 2011 Mustang, which is three times the number of advanced orders the last model had before its launch.

  • For any Mustang enthusiast, with HP generating mods, inspection time might make you a little nervous. Of course, to be friendly with the environment should be one of the goals when creating a Street Legal car. I've put together some check points, based on my experience, before taking your car to inspection. Please use this as a guideline rather than a sure bet stuff. This guide may not be useful if the inspection is done on a dyno (many states are starting to do this.)

  • Although this may seem very basic to many people, some people don't even know the easy way to check fuses. I've seen people suffer through the big pain of taking each and every fuse out one at a time to see if any of them are burnt. There's a lot easier way of checking fuses without taking them out.

    Ever notice that fuses have two small metal "tabs" on top of them? Those "tabs" or prongs are for checking them with a tester. You can buy a specific tester for this task but an ordinary 12V tester will work.

  • Types of Codes:

    See Eec Iv 2 Digit Codes
    See Eec Iv 3 Digit Codes

    NOTE: Some people have problems distinguishing the different codes. Read this section carefully. There are drawings of the code formats at the end of this section.

    Fast Codes:

  • c/o = carry over

    Year 1979 1982 1983 1984 1985
    Output - SAE net Horsepower


  • Whenever you change the rear end gears to another ratio (e.g. 2.73's to 4.10's) you have to change the speedometer gear too. Why? Because when you change the rear end gears you also change the ratio between how fast the speedo gear is spinning and how fast the car is actually going.

    Here is a chart to figure out which speedometer gear you will need.


  • Changing your oil is one of the best things you can do for your car. You can't change it too often. There's no easier way to keep that 302 running good than changing its oil.