chugging and backfiring intermittently. No codes - Page 4
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 4 of 5 FirstFirst 1 2 3 4 5 LastLast
Results 46 to 60 of 71
HT4100 4.1, 4.5, 4.9 Discussion, chugging and backfiring intermittently. No codes in Cadillac Engine Technical Discussion; I let the car run in my garage for about a half an hour. I still don't have my rear ...
  1. #46
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    I let the car run in my garage for about a half an hour. I still don't have my rear hydraulic cylinder back yet so I can't drive it. the front injectors were all between 16.5 and 16.8 OHMs. The rears were between 17.1 and 17.4 OHMs.

  2. #47
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,013

    Re: chugging and backfiring intermittently. No codes

    Change the TPS. I had the same kind of problem, wound up changing the MAP and the TPS and finally had to put in a new ISC adjuster. I'll hook the battery up tomorrow to find out if that's that last issue or not. A TPS and MAP change though has the whole motor running real smooth with good throttle response, the ISC screwed that all up when it decided to quit...

  3. #48
    donwon is offline Cadillac Owners Enthusiast
    Automobile(s): 92 Deville
    Join Date
    Sep 2004
    Location
    SC.
    Posts
    524

    Re: chugging and backfiring intermittently. No codes

    You said the fuel pump was changed about 4 years ago??? Could be the bushings are wearing on the pump and binding at some point,
    causing the fuel presure to drop.
    I changed out most electrical sensors on my 92 Deville, when that didn't help I put a fuel gauge on the fuel rail and used duct tape to tape the gauge to the windshield and drove the car watching the pressure gauge till it started flucuating, then I knew the fuel pump was going bad.
    Only doing the chuging spitting and poping under a load led me to believe it was in the ignation system. I used a Mallory pump and it has lasted 3 years so far.
    I also changed the tank because of the plastic baffel being broken.

  4. #49
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    I have a brand new fuel tank sitting in my shop. Going to paint it this week, then probably buy another fuel pump.

  5. #50
    donwon is offline Cadillac Owners Enthusiast
    Automobile(s): 92 Deville
    Join Date
    Sep 2004
    Location
    SC.
    Posts
    524

    Re: chugging and backfiring intermittently. No codes

    Less trouble and faster to do the pressure gauge, unles you just like to do this kind ofstuff.

  6. #51
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    Quote Originally Posted by donwon View Post
    Less trouble and faster to do the pressure gauge, unles you just like to do this kind ofstuff.
    true, but if im putting on a new gas tank, I might as well put a new pump in anyway.

  7. #52
    donwon is offline Cadillac Owners Enthusiast
    Automobile(s): 92 Deville
    Join Date
    Sep 2004
    Location
    SC.
    Posts
    524

    Re: chugging and backfiring intermittently. No codes

    How right you are. I didn't relize you were gonna change the tank anyway.

  8. #53
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    Quote Originally Posted by donwon View Post
    How right you are. I didn't relize you were gonna change the tank anyway.
    yessir. I was going to chrome the undercarriage this year, but i decided to move into a bigger house instead. my current gas tank is all rusted and looks like crap.

    Right now i'm putting on some custom LED tail lights I made. I'll put pics up here once I get them finished.

  9. #54
    steelybill is offline Cadillac Owners Enthusiast
    Automobile(s): '85 FWD fleetwood, '93 fleetwood Bro
    Join Date
    Mar 2009
    Location
    mich
    Age
    82
    Posts
    725

    Re: chugging and backfiring intermittently. No codes

    I wish the gas tank was the only thing rusty on mine!

  10. #55
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    Well, looks like i have bigger problems now. one of the sidewalls on teh inside of my tire is all ripped up and its slowly leaking air. not sure how that happened. there is a ton of construction here. also one of my back wheel bearings needs to be replaced. That'll be my project for tomorrow (tonight is my sons 2 years old birthday). Also here's pics of my new tail lights:




  11. #56
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    the above pictures didnt seem to work. Here:

    no lights:


    running lights:


    running lights and turn signals:

  12. #57
    DNE
    DNE is offline Cadillac Owners Member
    Automobile(s): 84 eldo. cov.
    Join Date
    Aug 2009
    Age
    59
    Posts
    16

    Re: chugging and backfiring intermittently. No codes

    I have a 4100 throtle body inj. eng in a 84 eldo, had same problem, after all was said and done it was the dist.

  13. #58
    Dee911Lady is offline Cadillac Owners Member
    Automobile(s): 92 Deville
    Join Date
    Jul 2010
    Posts
    1

    Re: chugging and backfiring intermittently. No codes

    Did the gas tank and fuel pump resolve this problem? I am having the same problems with my car now. It is currently in the shop and nothing is showing up as a problem. I assume by the last response you replaced the fuel tank and fuel pump and this solved the problem. Please let me know.

  14. #59
    red_ghost is offline Cadillac Owners Fanatic
    Automobile(s): 1991 Deville, 1995 Deville
    Join Date
    Nov 2005
    Location
    Green Bay Wi
    Age
    27
    Posts
    218

    Re: chugging and backfiring intermittently. No codes

    I never solved this problem. I haven't done much to correct it. $ been low. It hardly ever happens now. Seems to happen when its rainy or cold (i don't drive teh car at those times though).

  15. #60
    DNE
    DNE is offline Cadillac Owners Member
    Automobile(s): 84 eldo. cov.
    Join Date
    Aug 2009
    Age
    59
    Posts
    16

    Re: chugging and backfiring intermittently. No codes

    hi, not sure what engine you are talking about, I had a 4.1 do this after a long time trying to fig. it out turned out to be a bad dist. put in rebuilt runs great since.
    DNE

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