Help! Rough idle now after taking care to Firestone - 2001 Deville
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

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

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 6 of 6
Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, Help! Rough idle now after taking care to Firestone - 2001 Deville in Past Cadillac Vehicle Discussion; My ignition coil pack went out so i took it to the Firestone shop. They replaced the coil pack that ...
  1. #1
    magnumpi28 is offline Cadillac Owners Member
    Automobile(s): 2001 deville
    Join Date
    Apr 2013
    Age
    44
    Posts
    2

    Help! Rough idle now after taking care to Firestone - 2001 Deville

    My ignition coil pack went out so i took it to the Firestone shop. They replaced the coil pack that went out, but replaced all spark plugs too plus did the fuel service treatment.
    When i picked up my car the guy asked if i wanted to test drive my car and looked like a cat that just eat a canary(i thought that was odd) i said no, paid the bill and left. As soon as i got to the stop light i noticed a very very slight misfire about every 30-45 seconds.
    I took my car back and when i got the car they said it was a very small peice of carbon that got under a spark plug but they fixed it. They said this was caused by there wonderful fuel injection cleaning loosening the carbon.
    Then the service engine light came on and it said it was a air pump...Firestone said i needed a air pump and relay....i took it to a small auto shop and he replaced the air pump but said it didnt need a relay.
    However, My car seems to be running a little rough idle where before all of this it seemed to idle fine, the RPM seems fine, runs aroun1200-1275 then goes down to around 900 then around 650-675.
    The car is not pulling any codes yet.
    Its a 2001 deville with 130,000
    Can anyone tell me what i should have checked for a rough idle? Any help would be appreciated, i miss my smooth ride.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    maeng9981's Avatar
    maeng9981 is offline Cadillac Owners Connoisseur
    Automobile(s): 14 SRX, 12 Sierra, 00 SLS, 99 Deville 50-year Anniversary
    Join Date
    Mar 2009
    Location
    Dallas, TX
    Age
    23
    Posts
    3,017

    Re: Help! Rough idle now after taking care to Firestone - 2001 deville

    What was exactly done? What brand spark plugs did they use? Did they actually replace spark plugs? Sea-formed ("wonderful fuel injection cleaning")?

  4. #3
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,374

    Re: Help! Rough idle now after taking care to Firestone - 2001 deville



    Try a good TB cleaning.

  5. #4
    magnumpi28 is offline Cadillac Owners Member
    Automobile(s): 2001 deville
    Join Date
    Apr 2013
    Age
    44
    Posts
    2

    Re: Help! Rough idle now after taking care to Firestone - 2001 deville

    They used NGK platnuium spark plugs and for the fuel service was a product called QMI, they said they use to use BG products but this is cheaper.

    ----------

    They used NGK platnuium spark plugs and for the fuel service was a product called QMI, they said they use to use BG products but this is cheaper

  6. #5
    wishmaster242 is offline Cadillac Owners Member
    Join Date
    Jun 2013
    Posts
    1
    Did u ever get the rough idle fixed? I'm having same issue it's not all the time. And Firestone fixed my car also. They replace the idle air control valve , also the TPS throttle position sensor it's running no codes but everyone n a while it'll idle up and down. Can someone help me with this issue please.

  7. #6
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,374

    Re: Help! Rough idle now after taking care to Firestone - 2001 deville



    Update you profile to show your year and model so we know what we are talking about.

    Was the TB cleaned?

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting