My 4 brl carb quit
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 9 of 9
RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, My 4 brl carb quit in Past Cadillac Vehicle Discussion; Hi all just wondering what to check for when a 4 brl carb doesn't open all 4 only the top ...
  1. #1
    Angelo Gargarello is offline Cadillac Owners Member
    Automobile(s): 86 cadillac fleetwood brougham
    Join Date
    Jun 2011
    Location
    Melvindale, Michigan, United S
    Age
    21
    Posts
    27

    My 4 brl carb quit

    Hi all just wondering what to check for when a 4 brl carb doesn't open all 4 only the top smaller 2 are opening any advice other than get a new one..

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    MoistCabbage's Avatar
    MoistCabbage is offline Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
    Join Date
    Sep 2010
    Location
    East Boston MA.
    Age
    26
    Posts
    22,675

    Re: My 4 brl carb quit

    I assume your car has vacuum secondaries. Vacuum secondaries will only open under load.

  4. #3
    cadillac kevin's Avatar
    cadillac kevin is offline Cadillac Owners Master
    Automobile(s): chevy 350 powered 86 FWB, 00 safari h.t. 66 toro, 83 lesabre
    Join Date
    Dec 2010
    Location
    St. Louis, MO
    Posts
    5,831

    Re: My 4 brl carb quit

    the secondaries will only open when under WOT above 30 mph (or so).
    if they are not opening under those conditions, you have a vacuum issue.

  5. #4
    Fleetwood70 is offline Cadillac Owners Fanatic
    Automobile(s): 1970 Fleetwood 60-Special, 03 DHS
    Join Date
    Jan 2011
    Age
    24
    Posts
    140

    Re: My 4 brl carb quit

    Check the choke mechanism, if it doesn't open the choke fully when engine is warmed up, the secondaries won't open either.

  6. #5
    cadillac kevin's Avatar
    cadillac kevin is offline Cadillac Owners Master
    Automobile(s): chevy 350 powered 86 FWB, 00 safari h.t. 66 toro, 83 lesabre
    Join Date
    Dec 2010
    Location
    St. Louis, MO
    Posts
    5,831

    Re: My 4 brl carb quit

    btw angelo- pick yourself up a FSM for an '86 fleetwood brougham. they're immensly helpful and worth the $15 or so you'll pay for one. just make sure its the final edition (black cover). it has a large section on the carb.
    according to the FSM, you need to check and replace split, cracked, or worn vacuum hoses. (replace 1 hose at a time)

  7. #6
    sven914's Avatar
    sven914 is offline Cadillac Owners Connoisseur
    Automobile(s): 1989 Brougham d'Elegance, 1985 Fleetwood Brougham *Coupe*
    Join Date
    Dec 2008
    Posts
    4,195

    Re: My 4 brl carb quit

    I would replace all of the vacuum lines. If one has gone bad, from age, then the others aren't too far behind, and you could have multiple leaks. The most important thing is rerouting the hoses to their factory original locations.

    Here's a diagram:


  8. #7
    cadillac_al is offline Cadillac Owners Connoisseur
    Automobile(s): Cadillac 78 Seville, 78 Coupe de Ville, 92 Sedan de Ville
    Join Date
    Feb 2007
    Location
    Maine
    Age
    53
    Posts
    2,779

    Re: My 4 brl carb quit

    Most likely the choke is just out of adjustment. If the choke doesn't open all the way the secondaries won't open. If you know any drag racers they could adjust it in 3 minutes flat.

  9. #8
    ChiTDI is offline Cadillac Owners Member
    Automobile(s): '86 Brougham
    Join Date
    Mar 2004
    Posts
    54

    Re: My 4 brl carb quit

    Quote Originally Posted by cadillac kevin View Post
    btw angelo- pick yourself up a FSM for an '86 fleetwood brougham. they're immensly helpful and worth the $15 or so you'll pay for one. just make sure its the final edition (black cover). it has a large section on the carb.
    according to the FSM, you need to check and replace split, cracked, or worn vacuum hoses. (replace 1 hose at a time)
    Your lucky day. I have a Haynes and an FSM for an '86 that has left our family for the recycler.
    Books are free you pay postage. PM me.

  10. #9
    Angelo Gargarello is offline Cadillac Owners Member
    Automobile(s): 86 cadillac fleetwood brougham
    Join Date
    Jun 2011
    Location
    Melvindale, Michigan, United S
    Age
    21
    Posts
    27
    Thread Starter

    Re: My 4 brl carb quit

    thanks all that commented I changed them all reconnected and the past owner had one of them cut and shoved a screw in it but on the bright side I got on the free way and I felt her open all 4 the sound and feeling was amazing thank to all of you

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