Anyone have a Accelerator problem?
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 Allante Forum Discussion, Anyone have a Accelerator problem? in Past Cadillac Vehicle Discussion; My 1988 Allante has a accelerator problem, when you go about 35 miles an hour you cannot stop the car ...
  1. #1
    tjk5405 is offline Cadillac Owners Member
    Automobile(s): Allante
    Join Date
    Jun 2013
    Posts
    8

    Anyone have a Accelerator problem?

    My 1988 Allante has a accelerator problem, when you go about 35 miles an hour you cannot stop the car without putting it in neutral , any info would be appreciated.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    D Yaros's Avatar
    D Yaros is offline Cadillac Owners Fanatic
    Automobile(s): 1955 CDV, 1992 Allante, 1962 Olds 88 Conv
    Join Date
    Nov 2009
    Location
    Milwaukee
    Posts
    146

    Re: Anyone have a Accelerator problem?

    This sounds more than dangerous to me? Have not heard of/seen this before. Please let us know the cause and solution.

  4. #3
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
    Join Date
    Sep 2010
    Location
    East Boston MA.
    Age
    26
    Posts
    22,683
    Cannot stop the car in drive? You could floor it and the brakes would be able to bring the car to a stop. Do you mean that it will maintain 35 without throttle?

  5. #4
    tjk5405 is offline Cadillac Owners Member
    Automobile(s): Allante
    Join Date
    Jun 2013
    Posts
    8
    Thread Starter

    Re: Anyone have a Accelerator problem?

    Quote Originally Posted by MoistCabbage View Post
    Cannot stop the car in drive? You could floor it and the brakes would be able to bring the car to a stop. Do you mean that it will maintain 35 without throttle?
    Yes it will maintain the speed, I believe it's the idle control motor , but not sure

  6. #5
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
    Join Date
    Feb 2003
    Location
    california
    Age
    67
    Posts
    5,981

    Re: Anyone have a Accelerator problem?

    First thing to do is remove the rubber throttle body duct from the throttle body and clean the primary throttle bore ( the smaller diameter one) with Brakleen and an old toothbrush. Don't clean the larger bore, the Brakleen can damage the TPS!!! Then disconnect the battery for a minute or so. Reconnect the battery, start the car with the climate controls off. Let it idle in gear for 5 minutes so the computer can relearn curb idle. It will run very rough initially for a few seconds until the brakleen goes away. Then, without shutting off the engine, engage AUTO and 75 degrees on the climate control and again let it idle for 5 minutes in gear. Shut the car off, restart and go drive it. If it still idles too high, you will need the factory service manual to properly retract the idle control motor thru on board diagnostics to adjust the air gap between it and the throttle stop. Normally it should idle in gear at about 650 at normal temperature climate system on or off. I presume the engine temperature is getting to midway on the gauge quickly? Running too cool will keep the idle too high. Should be a 195 F thermostat.

  7. #6
    MoistCabbage's Avatar
    MoistCabbage is online now Cadillac Owners 10000+ Posts
    Automobile(s): Crimson 2001 Seville STS, 1990 Seville (RIP)
    Join Date
    Sep 2010
    Location
    East Boston MA.
    Age
    26
    Posts
    22,683
    The ISC plunger can be retracted by starting the engine, and placing a flat head screwdriver between they get and throttle plate. Then disconnect the ISC motor (while fully retracted), and adjust the gap to .030 using a feeler gauge.

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