• MON-FRI 8-6

Pre-Engine Build Question Form

Please only fill out this form if you have a tune scheduled!

    Thank you for choosing JM Automotive for your high-performance needs.

    Please answer all of these questions to the best of your knowledge so the process of the engine build goes as smoothly as possible. This is to help multiple things including but not limited to:

    • Knowing your goals with your vehicle will help us make sure we are doing the best build for your short term and long term needs. If you are looking for 500 WHP we would want to know what you plan to use it for. If you are straight line racing or doing some sort of track racing can dictate the recommendations to go with the build.
    • Knowing your current modifications will help us know what your current build state is so we can properly recommend needed parts and give a more accurate estimate. This also helps our tuner make sure there are no supporting modifications missing that may be needed for reliability or maybe a reason your engine failed. And lastly this ensures our initial startup base map is spot on to ensure proper break in. If you do not know your modifications you will have to pay a technician of ours to identify your modifications.
    • Knowing your vehicle year, make, model, transmission, and licence plate helps us ensure we have the correct parts for your vehicle here ready to go. With the license plate we can get your VIN number and have all of your proper OEM parts here. This all helps the turnaround process to be quicker.
    • Knowing your previous mechanical problems will help us give you a more accurate estimate as well as fix those problems cheaper while the engine is apart rather than find out after we get it running.

    We will be taking your car to speeds in excess of 100 mph on the dyno. If you are not comfortable taking your car up to 100 mph then it is not ready to be dyno tuned. If your car vibrates or pulls to one side at high speeds we can not tune it.

    Car Information


    View our pre-tune checklist here

    Did you read the full pre-tune checklist and other information on the link above? By filling out this form you are acknowledging you have read the checklist.

    A Cobb Accessport is Required for tuning All - 2015+ WRX/STI and 2014+ FXT (All Subaru Flex Fuel Tunes Require a V3 Accessport, except Carberry Flex i.e. 2002-2005 WRX.)

    List of all the modifications to your car or the parts you/we are installing. If they are stock please write STOCK or if you do not know please write UNKNOWN.

    Do you currently have or have had any Check Engine Lights?
    (We CANNOT tune a car if it has a check engine light due to any mechanical problems, if you currently don’t have any codes but get a code after the car is running on the new base map we provided, please update us with what codes you have. Your car should NOT have any check engine lights when you come in for the tune.


    Front O2 Sensor - P0030, P0031, P0032, P0131, P0132, P0134

    System too lean/rich - P0171, P0172, P2096, P2097

    TGV stuck closed but not deleted - P2004-P2022

    Speed Sensor code causing limp mode - P0500

    AVCS codes, Cam/Crank Correlation, Cam Over Advance - P000A, P000B, P000C, P000D, P0011, P0014, P0016, P0017, P0018, P0019 P0021, P0024

    Air pump - P2431, P2432, P2433

    Again if you have any of the codes listed above we can NOT tune your car.

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