1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start
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 7 of 7
HT4100 4.1, 4.5, 4.9 Discussion, 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start in Cadillac Engine Technical Discussion; I bought this a few weeks ago. I think it was sitting for a year or so before. It overheated ...
  1. #1
    BrentNewland is offline Cadillac Owners Member
    Automobile(s): 1985 Cadillac Fleetwood FWD
    Join Date
    Sep 2007
    Posts
    56

    1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    I bought this a few weeks ago. I think it was sitting for a year or so before. It overheated somewhat on the way home (almost no coolant), but it didn't blow any gaskets and I shut it off once the coolant light came on (let it cool off, then filled it up). It was dying while stopped in drive, and had hesitation when accelerating (and a 1.5-2 second delay when flooring it to feeling any acceleration).

    I replaced the O2 sensor (check engine light was on) and installed a new battery (battery was toast). That seemed to improve it greatly; however, it still idles rough and dies about half the time, and has hesitation and runs rough.

    I drove it a few blocks today, and the car died when I was pulling into the driveway (while still moving). Now the car won't start properly. I can crank it over, and when I floor the pedal it will start, but if I let off the gas it dies almost immediately, and if I keep it floored it won't stay started for more than a few seconds (and won't rev up very high).

    Here are the engine codes that I pulled:
    E20 - Open Fuel Pump Circut Feedback Signal
    E30 - ISC RPM Out Of Range
    E52 - PCM Memory Reset (See Note)
    E59 - VCC Temperature Sensor Circut Problem
    F40 - Air Mix Door Problem
    F41 - Cooling Fans Problem

    No idea what's going on here. Any clues what to check, or what the problem could be?

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    awadecki is offline Cadillac Owners Enthusiast
    Automobile(s): 76 Eldo (54k), 76 Eldo (52k), 78 Eldo (9k), 85 Deville (43k)
    Join Date
    Jun 2005
    Location
    Michigan
    Posts
    668

    Re: 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    You likely have an issue with the coolant temperature sensor. Replace it and report back here.

  4. #3
    BrentNewland is offline Cadillac Owners Member
    Automobile(s): 1985 Cadillac Fleetwood FWD
    Join Date
    Sep 2007
    Posts
    56
    Thread Starter

    Re: 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    http://www.partsamerica.com/ProductL...pe=290&PTSet=A

    Part No.
    TS25381
    Niehoff Ignition Coolant Temperature Sensor: Formerly DR134AK
    Coolant Temperature Sensor: Without Pigtail
    $7.99

    Part No.
    TS82871
    Niehoff Ignition Temperature Sender
    Coolant Temperature Sensor: With Light; Metal Temperature
    $24.99

    Part No.
    WT3000
    Borg Warner Coolant Temperature Sensor
    Coolant Temperature Sensor: With Connector
    $27.99

    Part No.
    WT3081
    Borg Warner Coolant Temperature Sensor
    Coolant Temperature Sensor: Except Connector
    $24.99

    Part No.
    TX1
    Standard Motor Products Engine Coolant Temperature Sensor
    Coolant Temperature Sensor:
    $30.99

    Part No.
    TX3
    Standard Motor Products Temperature Sensor
    Coolant Temperature Sensor:
    $29.99

    Part No.
    TSU81
    GP Sorensen Coolant Temperature Sensor
    Without Pigtail
    $26.99

    Part No.
    36401
    Factory Air Coolant Temp Sensor
    Coolant Temp Sensor:
    $39.99


    Which one would it be? And where is the sensor located (and is there a way to test)?

  5. #4
    ehall's Avatar
    ehall is online now Cadillac Owners Connoisseur
    Automobile(s): 1985 Sedan DeVille
    Join Date
    Aug 2007
    Location
    Southern Maryland
    Posts
    1,506

    Re: 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    E52 code is from battery replacement, all your old codes were lost during the changeover

    dunno about the rest, although it overall sounds like you are having a fuel problem

  6. #5
    BrentNewland is offline Cadillac Owners Member
    Automobile(s): 1985 Cadillac Fleetwood FWD
    Join Date
    Sep 2007
    Posts
    56
    Thread Starter

    Re: 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    I think it's a fuel problem. When I floor it, it will sound a bit higher pitched (while cranking), and every few seconds it will surge a bit (sounds like it almost catches).

    I checked all the fuses inside the car (which were fine), but couldn't find any under the hood. Guess I'll have to check that out on my day off (Dammit, have to ride the bus to work again...)

  7. #6
    BrentNewland is offline Cadillac Owners Member
    Automobile(s): 1985 Cadillac Fleetwood FWD
    Join Date
    Sep 2007
    Posts
    56
    Thread Starter

    Re: 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    Can anyone tell me where the fuel pump relay and coolant temperature sensor are on my vehicle?

  8. #7
    BrentNewland is offline Cadillac Owners Member
    Automobile(s): 1985 Cadillac Fleetwood FWD
    Join Date
    Sep 2007
    Posts
    56
    Thread Starter

    Re: 1985 Fleetwood FWD 4.1L hesitation/rough idle/won't start

    I found the fuel pump relay (I think... there were two relays hanging down next tot he battery, couldn't find more or any fuses under hood). Also puled the oil pressure light switch. All three appear to be covered in oil/grease, one of the relays had corrosion.

    Didn't locate the coolant temperature sensor.

    Also, I found a wire hanging out of a socket a few inches to the driver side of the cylinder 8 spark plug hole. The plastic connector shroud is broken and the wire won't stay in the hole. Can anyone tell me what this does, and how to get a replacement (other than a junkyard)?

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