lost of power
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
Page 1 of 2 1 2 LastLast
Results 1 to 15 of 28
HT4100 4.1, 4.5, 4.9 Discussion, lost of power in Cadillac Engine Technical Discussion; Ok I have a 93sdv 81k and I been having lost of power. I been getting bad gas milage hard ...
  1. #1
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    lost of power

    Ok I have a 93sdv 81k and I been having lost of power. I been getting bad gas milage hard starts one stall and it will idle up and down and when it levels out the car takes longer to catch speed. I had the egr replaced 3 weeks later I'm having the same problem except for the stalls. When I first noticed the problem the although voltage was 13.80 after the new egr it went back up to 14.50 idling . Now I'm having these issues the voltage is off again. Could someone tell me what's going on and if it's egr how do I clean it and the tubes

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    MrDobin is offline Cadillac Owners Fanatic
    Automobile(s): 1985 Cadillac Seville Elegante
    Join Date
    Feb 2009
    Age
    25
    Posts
    219

    Re: lost of power

    Not sure if I am following your question(s) totally. But when you say the car stutters or loses power when leveling out you should check on your fuel pump/pressure. Can't think of much that would cause that loss other than fuel lines and mechanisms.

  4. #3
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    Re: lost of power

    It does that but when your driving it you can feel that the engine is quieter than usually and it takes extra effort in pressing the gas to get it to speed up

  5. #4
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
    Automobile(s): 69 Thunderbird | 90 Seville | 89 Marquis | 72 Torino
    Join Date
    Oct 2008
    Location
    Palm Bay, FL
    Posts
    2,022

    Re: lost of power

    I'd check your grounds if your having a voltage issue along with the stalling but when the alternator is cold, it is normal for it to put out over 14 volts until it warms up. 15 or more will set a code. Check your codes first. Use a coat hanger or something similar to rod the carbon out of the tubes beneath the throttle blades.

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    72,732

    Re: lost of power

    Have you checked the FPR?

  7. #6
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    Re: lost of power

    Thanks on the alt Its a hi output and I have the big. 3 upgrade never had a charging issues till the egr thing. As for those egr lines they pull right off and on right. Andthat for what's that

  8. #7
    quins90lac's Avatar
    quins90lac is offline Cadillac Owners Enthusiast
    Automobile(s): 1990 Cadillac sedan devile
    Join Date
    May 2008
    Location
    Peoria IL USA
    Age
    32
    Posts
    616

    Re: lost of power

    HO alt and big 3 what kind of system you running.

  9. #8
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
    Automobile(s): 69 Thunderbird | 90 Seville | 89 Marquis | 72 Torino
    Join Date
    Oct 2008
    Location
    Palm Bay, FL
    Posts
    2,022

    Re: lost of power

    How do you know you have a charging problem? 13.8 to 14.5 looks good to me. The stock alt is already pretty high output for a regular car (120amp).

  10. #9
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    Re: lost of power

    before I started having issues with starting and performance it was at 14v then wen I did it was in the 13's the shop replaced my Egr and the voltage went back up now IM having problems again the voltage is Bck down. Its wired for a system but sadly the radio is still stock till I correct this issue and I can put my stereo in.

  11. #10
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
    Automobile(s): 69 Thunderbird | 90 Seville | 89 Marquis | 72 Torino
    Join Date
    Oct 2008
    Location
    Palm Bay, FL
    Posts
    2,022

    Re: lost of power

    Voltage in the 13's is normal. The EGR valve has absolutely NOTHING to do with the charging/starting system.

  12. #11
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    Re: lost of power

    Okay so wht do you think the issue is

  13. #12
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
    Automobile(s): 69 Thunderbird | 90 Seville | 89 Marquis | 72 Torino
    Join Date
    Oct 2008
    Location
    Palm Bay, FL
    Posts
    2,022

    Re: lost of power

    It's likely a fuel problem. Possibly the fuel pump is weak. You'll need a fuel pressure gauge to even begin testing the fuel system. The pressure should be between 34 and 38 psi with the engine one and 40 or more engine off. Unless the battery isnt charging or the car wont crank, then there is likely nothing wrong with the electrical system. It's spark or fuel.

  14. #13
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    Re: lost of power

    Spark plugs changed four months ago ac delco rapid fire. Whats a fpr. I noticed it uses twice as much gas usual could it be the injectors. And how do I test the gas to see if my psi is okay

  15. #14
    drewsdeville's Avatar
    drewsdeville is offline Cadillac Owners Master
    Automobile(s): none
    Join Date
    Oct 2004
    Location
    WI
    Posts
    5,300

    Re: lost of power

    No one asked and you never stated, any check engine light?

    There is a schrader valve at the right-front end of the fuel rail. You will need to attach in a fuel pressure gauge here. Not sure of the exact spec for these cars, but most GM fuel injection runs at 35-45 psi. Someone will chime in with the correct spec.

    FPR = fuel pressure regulator. It's the little cylinder attached to the fuel rail, underneath it, right next to the distributor. It has a vacuum line attached to it. If you remove the vacuum line and take a sniff, do you smell gas?

  16. #15
    still_walkin's Avatar
    still_walkin is offline Cadillac Owners Connoisseur
    Automobile(s): 1993 Cadillac deville sedan
    Join Date
    Apr 2007
    Location
    san diego
    Age
    31
    Posts
    1,458

    Re: lost of power

    No dash lights and I will check the fpr. One thing I notice is the ps sucks when I'm trying to park. Could the lack of gas throw that off. The engine is also so quiet like its not even on

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