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car becomes slower when warmed up!??!

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    #1

    car becomes slower when warmed up!??!

    when i turn on my 90' LX and drive around for the first lets say 15-30 minutes when the engine is still cold/cool i feel the motor has all of its power...but as the motor heats up and gets to "proper operating temp." it seems to lack power...u can definetly feel the power loss... anyone know what ould be causing this?? it gets on my nerves
    Tags: None
    #2
    yeap, that is typical...when the engine heats up, the block, cylinder bores, expand and the engine has less compression...especially if the cylinder rings are 20 years old.

    I find my car performs best in the cool moist morning...and the engine sounds great then too.

    if you want to fix this without having to rip open the motor...

    1) Get a valve adjustment
    2) tune up
    3) check tire pressure, alignment
    4) and all other regular maintenance things like spark plugs, oil, and distributor, air filter, O2 sensor.....

    The above will help make the power loss less noticeable....hopefully.
    DEVOTE


    __________________________________________
    FS: Lokuputha's Stuff
    "It's more fun to drive a slow car fast than it is to drive a fast car slow."-The Smartest Man In The World

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      #3
      Your intake manifold is probably saturated with heat transfered to it from the head, so the air is less dense by the time it reaches your motor.
      PT3/6 Development Thread | My 1991 LX Coupe | DIY: 90-93 Tcu Fix

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        #4
        Do you have a "short ram" air intake by any chance? If you do, ditch it for the factory airbox.

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          #5
          when cold the car uses a rich air fuel mixture, compression actually goes up when warm since the components expand and seal better
          [url=https://flic.kr/p/2hFNC7Z]

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            #6
            Originally posted by rexload View Post
            Do you have a "short ram" air intake by any chance? If you do, ditch it for the factory airbox.
            wel i dont have a short ram but i removed the box n put a cone filter in its place.....but why do u say this?

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              #7
              bro same with my old accord my 91 it turned out to be the tranny man as soon as all the car warms up and the tranny fluid car would bogg down buck or even slow down like felt like not shifting mostly slowing down not shifting



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                #8
                Originally posted by CBboY126 View Post
                wel i dont have a short ram but i removed the box n put a cone filter in its place.....but why do u say this?
                there is good airflow in the location where the stock airbox gets air.
                but when the air filter is exposed right next to the engine, it is obviously getting very hot air especially if you have aftermarket header with no heat shield

                Comment

                  #9
                  Originally posted by rexload View Post
                  there is good airflow in the location where the stock airbox gets air.
                  but when the air filter is exposed right next to the engine, it is obviously getting very hot air especially if you have aftermarket header with no heat shield

                  i see...but i do have a heat shield

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