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  1. #1

    Default Installing an after-market air filter and muffler, what should I know?

    Next week, when I am on vacation, I plan on doing a lot of work on my truck. I will be installing a new Specter air filter, new spark plugs, new PCV valve, new fuel filter, new fuel pump and a Flowmaster Super 50 muffler. My main concern is how will the engine react to so many changes all at once? With a new fuel pump and fuel filter, the fuel should flow a littler better but more specifically, the new air filter and muffler will drastically increase the air flow that the engine is not used to. Will this many changes all at once dramatically confuse my engine or computer? There was a sheet of notes that came with the new muffler that said the on-board computer is in a constant state of learning but with a new muffler, the battery should be disconnected for a couple of minutes after installation to reset the computer due to the increased airflow - again, I am installing a muffler and a high-flow air filter. Is resetting the computer all I need to do or are there any steps I should take before and after installation of all this stuff? Keep in mind, I have never done this much modding to a vehicle before so I am venturing down a new path and am looking for all the info I can. Thanks!
    Clint (TX) 2001 Silverado LS 4.8L auto 2wd ECSB [GARAGE]
    Gasoline or gunpowder: If you ain't burning one, you ain't having fun!
    NRA Endowment Member 5 24 48 88 - Hendrick Motorsports FTW!

  2. #2


    Your engine is definitely going to blow up!!! (just kidding)

    I do not think that your engine or computer will react in a negative way to the mods. When I installed my 50 series, I didn't do anything to adjust the computer. I do not have a high flow air filter or anything. But that is a good question though. If the sheet said to do that, I would but I cant think of anything else that you have to do.
    2002 Chevy Silverado & 1995 Ford Bronco

    02 Silverado: 50K miles, 20" Motto Rims, Flowmaster 50 Series
    95 Bronco: 160K miles, 4" Superlift, 33/12.5/15 Mickey Thompson
    01 Civic: 75K miles, DD

  3. #3


    Vehicles from that time frame normally have the ability to adjust or learn changes.
    Like the instructions say disconnect the battery for 10 minutes or so then when you reconnect and start the truck let it idle for another 10 minutes, this should allow the computer to update and learn the new parameters.
    Another way to do this is drive the vehicle around like you normally would and usually after roughly a 100 miles it should've learned new parameters to deal with the changes.

  4. #4


    Bump for any last minute tips, tricks or info. I'll be heading out of town tomorrow night and won't have access to a computer with internet. Well, I could use my phone. Figured I'd see if there was anything to know before doing the swap in a couple of days.

  5. #5


    So, last week I did I all the work I mentioned and then drove the truck on a 300 mile trip and again on a 400 mile trip (all in one week!). Turns out, everything is working just fine!

  6. #6


    Glad to hear of no problems. So how do you like the upgrades so far?

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