high idle - 89 307
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 5 of 5
5.0 and 5.7 Discussion, high idle - 89 307 in Cadillac Engine Technical Discussion; i just replaced the intake manifold gasket and put new gaskets on the carb while it was off. i took ...
  1. #1
    gdorell is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Jan 2007
    Posts
    89

    high idle - 89 307

    i just replaced the intake manifold gasket and put new gaskets on the carb while it was off. i took some pics of the vacuum hoses...so they look like they are ok. but now she has a really fast idle. without a tach its hard to gauge but if before it was idling at 600, now it must be about 900-1000 rpms.

    any ideas on how to narrow down my problems

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Motorboat is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Feb 2007
    Posts
    89

    Re: high idle - 89 307

    Sounds like a vacumm leak. Spray some starting fluid around the manifold and carb base while the engine is running, when the idle increases you have found the leak.

  4. #3
    RocketFast321's Avatar
    RocketFast321 is offline Cadillac Owners Fanatic
    Automobile(s): 1984 Buick Electra Estate Wagon aka Country Cadillac
    Join Date
    Jun 2003
    Location
    Montgomery,Al
    Age
    28
    Posts
    395

  5. #4
    JTraik is offline Cadillac Owners Enthusiast
    Automobile(s): '68 DeVille '95 FWB '99 Eldo '96 Cummins Ram 5MT
    Join Date
    Mar 2004
    Location
    Rochester, NY
    Age
    28
    Posts
    763

    Re: high idle - 89 307

    I second the vacuum leak... You have to follow a specific pattern when installing the intake manifold, if not installed correctly it is likely that is the cuplrit.

    What kind of gaskets were installed?

  6. #5
    gdorell is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Jan 2007
    Posts
    89
    Thread Starter

    Re: high idle - 89 307

    one of the vacuum lines did have a slight crack in it. hate those pesking little things....

    im seriously considering putting in a tbi engine just to eliminate them

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