TPS - 1996 Deville
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, TPS - 1996 Deville in Past Cadillac Vehicle Discussion; I have had hesitation, performance, hard starts and MPG issues with my 96 Deville, I have replaced the MAF sensor/casing, ...
  1. #1
    TeLi is offline Cadillac Owners Member
    Automobile(s): 1996 Cadillac Deville
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    Sep 2012
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    TPS - 1996 Deville

    I have had hesitation, performance, hard starts and MPG issues with my 96 Deville, I have replaced the MAF sensor/casing, O2 sensors, cleaned the throttle body, used injector cleaner and fuel treatment. I have also replaced the EGR, crank shaft sensors and radiator recently. The plugs and wires are a little over a year old.
    While cleaning the throttle I removed the TPS and the hard start disappeared. I went for a test drive and the car had increased performance but not up to par and still the hesitation. When I returned I thought I would try removing the TPS and see what happened, I had no hesitation and increased performance but MPG was still down.
    What should my next step be, I am almost convinced just to leave off the TPS and deal with the MPG.

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  3. #2
    basscatt's Avatar
    basscatt is online now Cadillac Owners Master
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 02 DHS, 03 SLS
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    Re: Tps

    your NEXT step should have been your FIRST step -

    check for Diagnostic Trouble Codes -

    if you don't know how - go here and read the ENTIRE post -

    http://www.cadillacforums.com/forums...odes-dtcs.html

    if you have any codes - post them here -
    ALONG WITH THEIR DEFINITIONS -

  4. #3
    frostycadillac is offline Cadillac Owners Member
    Automobile(s): 1968 DeVille, 1985 Seville, 1990 Deville, 1994 Deville,
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    Re: Tps

    It's truly ashame, but every Cadillac owner learns this very hard lesson. First step, pull codes and never through money at a Cadillac ! My father, who has owned Cadillacs since I was a kid, thought you work on this like it was a '64 Chevy, he learned the hard way, knowledge is the key to saving money, your sanity and your car! BTW, those TPS do go bad and will make your car run terrible ! I'm curious what you learned, so please let us know! I'm a graduate of the School of Hard Cadillac Knocks !

  5. #4
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with floor shift)
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    Re: TPS - 1996 Deville

    Quote Originally Posted by TeLi View Post
    I have had hesitation, performance, hard starts and MPG issues with my 96 Deville, I have replaced the MAF sensor/casing, O2 sensors, cleaned the throttle body, used injector cleaner and fuel treatment. I have also replaced the EGR, crank shaft sensors and radiator recently. The plugs and wires are a little over a year old.
    Have you checked for a leaky FPR?

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