1985 deville diesel 4.3 l
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 1985 deville diesel 4.3 l in Past Cadillac Vehicle Discussion; Anybody know where I can buy a fuel filter for this vehicle? Also if anyone has a good suggestion for ...
  1. #1
    gregmaint is offline Cadillac Owners Member
    Automobile(s): 1985 deville diesel
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    1985 deville diesel 4.3 l

    Anybody know where I can buy a fuel filter for this vehicle? Also if anyone has a good suggestion for which fuel additive to use for this particular year of Cadillac.

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  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
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    Re: 1985 deville diesel 4.3 l



    That was a pretty common fuel filter. $9.69 at www.rockauto.com

    Why do you want a fuel additive?

    P.S.
    I didn't think any of those diesels where still running.

  4. #3
    dennis93coupe's Avatar
    dennis93coupe is offline Cadillac Owners Connoisseur
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    Re: 1985 deville diesel 4.3 l

    Before you order from rockauto, call them and make sure the correct part is in the box. I have had that problem with them lately.

  5. #4
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 1985 Coupe Deville 4.1 & 1970 Eldorado 8.2
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    Re: 1985 deville diesel 4.3 l

    The 85 V6 Diesel had 2 different filters. Early internal EGR filter (TP888) and the late 85 External EGR which used a TP1000. Unfortunately the replacement TP1000 filters require trimming of the water in fuel probe to allow them to fit. The TP888 is pretty common. The TP1000 is harder to get. Amazon.com is one of the better sources for these.

    I also have a 1985 Coupe Deville 4.3 V6 Diesel ans i use the standard Stanadyne fuel additive. It adds a lubricant to compensate for the low sulphur content fuels. Some just add a bit of Marvel Mistery Oil. Anything that replaces the Sulphur which is critical to injection pump longevity.

    Where are you located?

  6. #5
    gregmaint is offline Cadillac Owners Member
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    Re: 1985 deville diesel 4.3 l

    illinois

  7. #6
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 1985 Coupe Deville 4.1 & 1970 Eldorado 8.2
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    Re: 1985 deville diesel 4.3 l

    Would that possible be a Gray Coupe Deville? I almost bought one near Illinois a few years back.

  8. #7
    gregmaint is offline Cadillac Owners Member
    Automobile(s): 1985 deville diesel
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    Re: 1985 deville diesel 4.3 l

    Thanks for the help most appreciated.

  9. #8
    gregmaint is offline Cadillac Owners Member
    Automobile(s): 1985 deville diesel
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    Re: 1985 deville diesel 4.3 l

    yes it was my wifese uncles he passed away a couple of years ago. He bought it in 1986. Been sitting for a couple years in a storage shed.

  10. #9
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 1985 Coupe Deville 4.1 & 1970 Eldorado 8.2
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    Re: 1985 deville diesel 4.3 l

    Would this be your car?

    greydiesel.jpg

    This is my car.

    diesel_small.jpg

  11. #10
    cjmeyer is offline Cadillac Owners Member
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    Re: 1985 deville diesel 4.3 l

    What is the fuel mileage with the diesel?

  12. #11
    aeronca36606 is offline Cadillac Owners Enthusiast
    Automobile(s): 1985 Coupe Deville 4.1 & 1970 Eldorado 8.2
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    Re: 1985 deville diesel 4.3 l

    I really have not yet tracked my black Coupe Deville yet. My last 85 Coupe Deville diesel (silver) would get about 38 mpg on the highway (level ground). More than that it got me about 30 around town. Now i must admit that i drive like an old lady but these where exceptional numbers in my opinion and much more than was published. Gearing is critical to good mileage on these diesels. The chevy celebrities with the th125 trans did not do as good. The 440-t4 diesel gearing was different than the gas version. I am interested in getting the figures on the black coupe as i have a gas transmission in it now. I need too rebuild my diesel trans and am trying to get all of the parts necessary. Keep in mind that they where only 85 horse power. Not a ball of fire in the power department. They do cruise nicely at speed easily running 75 with room to spare. You must remember though that the faster you run there more you loose efficiency and mileage.

  13. #12
    cjmeyer is offline Cadillac Owners Member
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    Re: 1985 deville diesel 4.3 l

    Great mileage.Especially for the day!

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