Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

Results 1 to 5 of 5

Thread: how to/ Tune up

  1. #1
    Join Date
    Sep 2003
    Location
    Bucks County, Pa
    Age
    34
    Posts
    1,805

    how to/ Tune up

    What is covered in a "standard" tune-up on the 4.9. What can i do myself? I want to cover the engine from top to bottom. I have no clue where to start. Is there a standard list that people go by. Is there special tools or diagnostic equipment that i need.

    The things that i came up with was to put new spark plugs in and new wires, clean out the air induction system, change the oil, clean the throttle body but where do i go from there???

    if anyone can give me suggestions please be as detailed as possible (don't mind me im a little slow) Thanks in advance


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Join Date
    Jan 2003
    Location
    Newtown, PA
    Age
    58
    Posts
    6,472

    Re: how to/ Tune up

    The "typical" dealer or shop will tell you that a "tune-up" is plugs & filters but I will tell you that beyond that, you should be doing and OBD diagnostic (check for codes), change the accessory drive belt, check the belt tensioner, replace the distributor cap and rotor, ignition wires, check the ignition timing, check the intake manifold bolt torque, do a complete "once-over" for leaks, check the battery connections, check the charging system voltage, just basically go over the whole damn thing.

  4. #3
    Ralph's Avatar
    Ralph is offline Cadillac Owners 10000+ Posts
    Automobile(s): Cadillac
    Join Date
    Mar 2003
    Location
    Saskatchewan, Canada
    Posts
    16,105
    PCV valve! It's hidden under the right side of the front valve covering. (black plastic) This little 3 dollar item froze up on me with my Mercury and cost me 1200 dollars in oil seals, change it! I recommend Bosch Platinum spark plugs as they have proven themselves in my other vehicles. Yes, there are better plugs.

  5. #4
    Join Date
    Jun 2003
    Posts
    83

    Re: how to/ Tune up

    with your model car i don't think u have a cap and rotor. and i think the timing is done by the on board computer. a tune up would be spark plugs, wires, air filter, fuel filter, pcv valve, and put in some fuel injection cleeaner, and if u haven't change the oil than do that to. oh for spark plugs stay away from the Bosch 4's they are not gapped and most cars need a gapped plug and the bosch 4's aren't and u can't gap them. they cause my 94 chevy cavalier to miss fire big time. just my 2cents

  6. #5
    92EldoTC's Avatar
    92EldoTC is offline Cadillac Owners Enthusiast
    Automobile(s): Ex:'92 ETC 4.9 Current:'91 Sedan Deville 4.9
    Join Date
    May 2006
    Location
    Vegas, NV
    Age
    38
    Posts
    691

    Re: how to/ Tune up

    I think 4.9's do have a cap & rotor if im not mistaken but the timing IS controlled by the ECM.


Bookmarks

Cadillac Posting Rules

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Read about Lincoln | Buick | Kia Forte Forum