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86 TR hesitates when maintaining speed

Discussion in 'Technical Q&A' started by testarob, Jun 14, 2006.

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  1. testarob

    testarob F1 Rookie

    May 13, 2006
    2,504
    Debary, Florida
    Full Name:
    Rob
    #1 testarob, Jun 14, 2006
    I have an 86 TR that just had a major service. I seem to be experiencing a slight hesitation when I try to maintain my current speed. This occurs at various rpm's and various gears. I have absolutely NO hesitation if I accelerate in any gear. I drive the car at least twice a week, and run premium fuel.

    Any thoughts?
     
  2. tbakowsky

    tbakowsky Two Time F1 World Champ
    Consultant Professional Ferrari Technician

    Sep 18, 2002
    20,042
    The Cold North
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    Tom
    #2 tbakowsky, Jun 14, 2006
    Sound like an ignition issue. Did they put in new spark plugs?? If they did you may have gotten a bad one. This happend to me on a TR. It drove me nuts until on a lark I replaced the plugs again and it cured the problem. Even though a part is brand new, it doesn't mean it will work as expected!
     
  3. testarob

    testarob F1 Rookie

    May 13, 2006
    2,504
    Debary, Florida
    Full Name:
    Rob
    #3 testarob, Jun 14, 2006
    Yes, they replaced plugs. I will swing by the dealer and see what they say.
     
  4. lm2504me

    lm2504me Formula 3
    Silver Subscribed

    Aug 26, 2004
    1,122
    Nipomo, CA
    Full Name:
    Richard
    #4 lm2504me, Jun 14, 2006
    I always perform an electrical continuity check of new spark plugs and wires prior to installation. I have on occasion found one plug in the set that reads infinity ohms. This is true especially for resistor plugs, since the carbon rod inside will shatter if the plug is dropped accidently, even in the box. I have also found some of the plugs go bad due to corrosion in the internals at the top connection where the plug boot is pushed on. I opened a new plug to see how it failed.

    I have also found bad plug wires.

    Rich
    87 TR USA #73703 Red / Beige
     

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