73 coupe deville makeover
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  • 1 Post By Cady70
RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, 73 coupe deville makeover in Past Cadillac Vehicle Discussion; I'm rj, I havent really done my intro cuz I'm in desperate need of help. My carburetor is falling on ...
  1. #1
    grimms73deville is offline Cadillac Owners Member
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    73 coupe deville makeover

    I'm rj, I havent really done my intro cuz I'm in desperate need of help. My carburetor is falling on its face. I don't know what it is. As I accelerate is spits, chokes and stutters terribly. The only time it won't do it is if I'm barely on the gas. I have the 472. Please help.

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  3. #2
    csbuckn is offline Cadillac Owners Master
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    Re: 73 coupe deville makeover

    Is the choke working properly? Run poorly after warm up?

  4. #3
    77CDV's Avatar
    77CDV is offline Cadillac Owners Master
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    Re: 73 coupe deville makeover

    Sounds like it's flooding. Check choke and throttle adjustments and linkage.

  5. #4
    grimms73deville is offline Cadillac Owners Member
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    Yeah, it happens after the motor warms up and any time I try to accelerate quickly. I'll try messing with that stuff before I try rebuilding the carb. Thanks guys! I also want to remove the vinyl top, how would I trim out Around the window without the top? Any suggestions?

  6. #5
    77CDV's Avatar
    77CDV is offline Cadillac Owners Master
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    Re: 73 coupe deville makeover

    You'd have to score the trim from a 1971-1973 car that never had a vinyl top.

  7. #6
    grimms73deville is offline Cadillac Owners Member
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    Update: not good! So I have no idea what I'm doing with those carburetors but my car keeps over heating. Is it still a carburetor issue or could it be my timing?

  8. #7
    77CDV's Avatar
    77CDV is offline Cadillac Owners Master
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    Re: 73 coupe deville makeover

    More like your thermostat. How's the radiator? Clean? No blockages?

  9. #8
    grimms73deville is offline Cadillac Owners Member
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    I just replaced the thermostat last week cuz it was getting warm, even went with the 180. I don't know about the water pump or radiator though. What I meant to ask was would the running rich of the carburetor cause it to run hotter than normal?

  10. #9
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: 73 coupe deville makeover

    No. It will run hotter if the mixture is lean. Check your vacuum lines. These and all Cadillac engines have considerable lengths of vacuum lines that control several dashpots and server motors on the engine and inside the passenger compartment. They dry out and crack over time and make certain aspects of engine control inoperable, which leads to poor operation. Also, check the vacuum controls and dashpots. Check your distributor. The vacuum canister should respond to signal from the engine vacuum and the centrifugal advance, which is under the rotor cap, will sometimes freeze up and become non-functional. Once you have check out all these, you will have a base to make further diagnosis of your engines operation.

  11. #10
    grimms73deville is offline Cadillac Owners Member
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    Warm warm warm! The overheating has gotten out of control. I can't even drive it 6 blocks without the valves covers starting to smoke. I can't diagnose anything else until it will run longer than 10 minutes. Bad water pump, oil pump, fan, radiator? I seriously cannot figure out why is running so damn hot!

  12. #11
    deVille33 is offline Cadillac Owners Connoisseur
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    Re: 73 coupe deville makeover

    How long you had this car, or rather how long has it sat idle? It sounds like you may have blockage in the water passages. Does the cooling system "BANG"? They will when you get steam in the system. Open your radiator cap, turn it upside down and look at the seal and the coils and observe if the coolant circulates. Perhaps your cooling system needs a good flushing and neutralizing. Does your radiator cap have brown rust sludge around the seal and coils? Water out the weep hole?

  13. #12
    csbuckn is offline Cadillac Owners Master
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    Couple things I'd do...Run it with the radiator cap off to see if it needs to burp, run it without the thermostat to see if it's faulty, rent a cooling system pressure tester to see if you have a leak somewhere. You 100% that you put the thermostat on correctly?

  14. #13
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    Cady70 is offline Cadillac Owners Member
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    Re: 73 coupe deville makeover

    Sounds like a blown head gasket.
    77CDV likes this.

  15. #14
    77CDV's Avatar
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    Re: 73 coupe deville makeover

    Quote Originally Posted by Cady70 View Post
    Sounds like a blown head gasket.
    This. Really rare on a 472, but it does happen, esp if the car has been neglected for a long time.

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