1996 Deville 4.6 will crank over but not start help needed
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 13 of 13
Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 1996 Deville 4.6 will crank over but not start help needed in Past Cadillac Vehicle Discussion; I have a 1996 Sedan Deville 4.6 that will not start unless i spray into the intake. Ok now this ...
  1. #1
    Clean Jones's Avatar
    Clean Jones is offline Cadillac Owners Member
    Automobile(s): 1969 Eldorado, 1985 Eldorado, 1996 Sedan Deville
    Join Date
    May 2013
    Location
    East Texas
    Posts
    7

    1996 Deville 4.6 will crank over but not start help needed

    I have a 1996 Sedan Deville 4.6 that will not start unless i spray into the intake. Ok now this is what i have checked so far: Im getting 43 at the fuel injector rail for the fuel pressure. Spark to all plugs are good. I tested the injector pluse with my noid light and they all showed to have power. Now what could be cutting the injector pulse off while trying to start the car? After attempting to start the car several times the fuel pressure never drops even with the fuel pump relay out.

    1. Their is no radio in the car.
    2. The security light is not on.
    3. List of codes:
    AC2016
    IP2750
    PZ2471
    PZ2255
    PZ1971
    TC0023
    TC0073
    RS0038
    OBD P0208

    I dont believe that the PCM or the PZM is bad and I dont believe all injectors have gone out at one time. Any information to help me find out whats going will be greatly appreciated.

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    70,469

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Codes are meaningless without their definitions.


    I have a 1996 Sedan Deville 4.6 that will not start unless i spray into the intake.
    THAT can only mean one thing. You are not getting fuel to the cylinders and THAT can only mean fuel pressure or injectors.

    OR maybe no idle air. Have you tried starting it with your foot holding the throttle partially (NOT wide open) open?

  4. #3
    Clean Jones's Avatar
    Clean Jones is offline Cadillac Owners Member
    Automobile(s): 1969 Eldorado, 1985 Eldorado, 1996 Sedan Deville
    Join Date
    May 2013
    Location
    East Texas
    Posts
    7

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Ok the fuel pressure to the injectors are good. Have spark from the coils which also are good. I also have injector pulse while cranking engine over. Now my problem is the engine starts then dies right away like something is shutting the injector pulse off before the engine fully starts. If I spray the intake the car runs as long as i spray it. No the security light is not on and the starting system is not disabled but the car does not have a radio installed at this time. The car has been sitting up for about 4 years dead. Have anyone experienced anything like this before and if so i would appreciate any helpful information.

  5. #4
    Team ZR-1 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Aug 2006
    Posts
    42

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Maybe a VATS issue or a start safety switch out of adjustment ?

  6. #5
    Clean Jones's Avatar
    Clean Jones is offline Cadillac Owners Member
    Automobile(s): 1969 Eldorado, 1985 Eldorado, 1996 Sedan Deville
    Join Date
    May 2013
    Location
    East Texas
    Posts
    7

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Yeah but as far as I know the vats would not allow the car to crank over.

  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
    18,765
    VATS disables the starter and fuel pump.

  8. #7
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    70,469

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Quote Originally Posted by Clean Jones View Post
    Ok the fuel pressure to the injectors are good.
    "Good" doesn't mean much. How do you know it's "good"? What is the fuel pressure?

  9. #8
    Clean Jones's Avatar
    Clean Jones is offline Cadillac Owners Member
    Automobile(s): 1969 Eldorado, 1985 Eldorado, 1996 Sedan Deville
    Join Date
    May 2013
    Location
    East Texas
    Posts
    7

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Fuel Pressure: 45 and steady with switch on
    Noid Light Test: All are blinking while cranking engine over
    Coils: All 8 cylinders are getting spark all the way to plugs

    The only problem is the fuel injectors will not spray any fuel! I guess im going to try another set of injectors to see if that will fix my problem. I dont believe it will but I can finally eliminate all 8 bad injectors and move on to looking at something else.

    I charged the battery and done the relearn for the security system but the engine still cranks over but will not start. Any information provided will be greatly appreciated.

  10. #9
    rodnok01's Avatar
    rodnok01 is online now Cadillac Owners Connoisseur
    Automobile(s): 98 DeVille, 97 DeVille d'Elegance
    Join Date
    Feb 2012
    Location
    NC
    Posts
    2,962
    Is there a fuse for injectors?

  11. #10
    brougham is offline Cadillac Owners Master
    Automobile(s): 1991 Cadillac Brougham D'Elegance 5.7 Litre
    Join Date
    Jun 2003
    Location
    Canada
    Posts
    5,278

    Re: 1996 Deville 4.6 will crank over but not start help needed

    I don't know what kind of ignition setup the 4.6 has but a bad HEI module will make injectors not fire. I highly doubt all 8 would go bad at the same time so you're best bet is to look for whatever controls them.

  12. #11
    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
    18,765
    '93-'99 Northstars have 4 coils, each serving 2 cylinders, and an ICM mounted underneath.

  13. #12
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
    Join Date
    Jun 2004
    Location
    Woodstock Ill.
    Age
    66
    Posts
    70,469

    Re: 1996 Deville 4.6 will crank over but not start help needed

    There are 2 injector fuses. I think they are labeled IGN 1 and IGN 2 if I remember correctly.

    Don't waste your time replacing injectors. The chances of all 8 going at once are infinitesimal.

    Something does not make sense. How can you have fuel pressure, noid light blinking and still have no injector fuel spray?

  14. #13
    Clean Jones's Avatar
    Clean Jones is offline Cadillac Owners Member
    Automobile(s): 1969 Eldorado, 1985 Eldorado, 1996 Sedan Deville
    Join Date
    May 2013
    Location
    East Texas
    Posts
    7

    Re: 1996 Deville 4.6 will crank over but not start help needed

    Ok My Problem Has Been Resolved! Ok like I previously stated I replaced all 8 injectors and the injector rail (due to me breaking it while removing the injectors) and the car started right up. Now for me I didnt believe that all 8 injectors would go bad at one time. I checked the coil resistance on each old injector and it varied between 12.6 ohms -12.8 ohms which showed the injector to be good. What I couldnt do is get the darn injectors to spray, drip, or anything. I thought about the car had been sitting up for 4 years with fuel pressure at the injectors constantly. So all that gas that was loaded in the injector after 4 years of sitting turned into wax(google old gas) and clogged up every darn injector. F.Y.I. If you are going to store your Cadillac for longer than a couple of months REMOVE BATTERY AND RELIEVE FUEL PRESSURE AT THE INJECTOR RAIL IT WILL SAVE YOU IN THE LONG RUN!! Thanks for all the technical information provided it was greatly appreciated.

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