1988 Honda Accord Lxi rev'ing Up and Down

Discussion in 'Accord' started by CPT BOYZ, Dec 2, 2003.

  1. CPT BOYZ

    CPT BOYZ Guest

    Got a question maybe someone can answer...

    My 88 Honda Accord Lxi with 200K plus milage started rev'ing up and down
    after warming up. I thought maybe the vacuum adv. on the distributor
    might be bad, but verifing timing (pulling hoses and blocking/ chk
    timing) all are alright (car does not rev up and dwn when I do this).
    But once I put the hoses back same thing. If I pull the hose closest to
    the front end of the car, the engine stops rev'ing up and dwn. Another
    thing I did is replacing the all hoses to vacuum adv, I disconnected the
    power plug to the vacuum control module (left portion of firewall) and the
    car stops rev'ing up and down. SUGGESTIONS????
     
    CPT BOYZ, Dec 2, 2003
    #1
  2. Best I can think of: turn the heat to max and bleed coolant. Remove the
    battery for a minute to reset ECU.
     
    Indian Summer, Dec 3, 2003
    #2
  3. Best I can think of: turn the heat to max and bleed coolant. Remove the
    battery for a minute to reset ECU.
     
    Indian Summer, Dec 3, 2003
    #3
  4. CPT BOYZ

    N.E.Ohio Bob Guest

    ECU re-set is done by removing the ECU fuse for ten seconds. The fuse
    is in the under hood fuse box.
    See if there is something in the intake screen for the vacuum source in
    the big box full of controls on the passenger side of the outer
    firewall. (all the vac lines run to it)
    Good Luck! bob
     
    N.E.Ohio Bob, Dec 3, 2003
    #4
  5. CPT BOYZ

    N.E.Ohio Bob Guest

    ECU re-set is done by removing the ECU fuse for ten seconds. The fuse
    is in the under hood fuse box.
    See if there is something in the intake screen for the vacuum source in
    the big box full of controls on the passenger side of the outer
    firewall. (all the vac lines run to it)
    Good Luck! bob
     
    N.E.Ohio Bob, Dec 3, 2003
    #5
  6. CPT BOYZ

    Eric Guest

    I agree with the above suggestion to bleed the coolant. The most common
    problem associated with the idle cycling up and down is usually due to a
    lack of coolant flowing through the cold start valve. The valve is item
    number 8 in this diagram http://tinyurl.com/xj18. If the valve doesn't warm
    up as the engine warms up (from coolant flowing through the bottom part),
    the PGMFI system will misinterpret the condition and idle cycling results.
    The first thing to due is to check the valve and make sure that the lower
    part of the valve gets hot as the engine warms up. If the valve doesn't get
    hot, try bleeding the coolant and make sure that coolant is flowing through
    the valve. You can double check the valve as a source of the cycling by
    removing the two screws from the top along with the oval shaped plate and
    push down on the inner valve/plunger in the center. The cycling should stop
    if the valve is the problem. If the valve is getting hot and pushing the
    inner plunger down stops the cycling, then the valve likely needs to be
    replaced.

    Eric
     
    Eric, Dec 3, 2003
    #6
  7. CPT BOYZ

    Eric Guest

    I agree with the above suggestion to bleed the coolant. The most common
    problem associated with the idle cycling up and down is usually due to a
    lack of coolant flowing through the cold start valve. The valve is item
    number 8 in this diagram http://tinyurl.com/xj18. If the valve doesn't warm
    up as the engine warms up (from coolant flowing through the bottom part),
    the PGMFI system will misinterpret the condition and idle cycling results.
    The first thing to due is to check the valve and make sure that the lower
    part of the valve gets hot as the engine warms up. If the valve doesn't get
    hot, try bleeding the coolant and make sure that coolant is flowing through
    the valve. You can double check the valve as a source of the cycling by
    removing the two screws from the top along with the oval shaped plate and
    push down on the inner valve/plunger in the center. The cycling should stop
    if the valve is the problem. If the valve is getting hot and pushing the
    inner plunger down stops the cycling, then the valve likely needs to be
    replaced.

    Eric
     
    Eric, Dec 3, 2003
    #7
  8. Indian Summer,

    To clarify, I think you mean to bleed the AIR that's trapped in the
    cooling system (at the provided nipple) rather than DRAIN the coolant.
    Some folks wouldn't know that there is a difference.

    'Curly'

    ------------------------------
     
    'Curly Q. Links', Dec 3, 2003
    #8
  9. Indian Summer,

    To clarify, I think you mean to bleed the AIR that's trapped in the
    cooling system (at the provided nipple) rather than DRAIN the coolant.
    Some folks wouldn't know that there is a difference.

    'Curly'

    ------------------------------
     
    'Curly Q. Links', Dec 3, 2003
    #9
  10. CPT BOYZ

    CPT BOYZ Guest

    Appreciate All the help!! Will try and see what happens.
     
    CPT BOYZ, Dec 4, 2003
    #10
  11. CPT BOYZ

    CPT BOYZ Guest

    Appreciate All the help!! Will try and see what happens.
     
    CPT BOYZ, Dec 4, 2003
    #11
  12. CPT BOYZ

    John W. Guest

    Had this problem on a 1992 Honda Accord. The idle air screw on the
    throttle body had loosened causing the engine to rev up. The computer
    would then try to bring the idle down, the net result was a flucuation
    in idle between 1,000 and 1,500 rpm. So you might want to check the
    screw (was on left side of throttle body opening on the '92), I think
    the normal idle speed should be around 750rpm. I just turned the
    screw clockwise until I reached that rpm and the revving stopped.

    Good luck.
     
    John W., Dec 5, 2003
    #12
  13. CPT BOYZ

    John W. Guest

    Had this problem on a 1992 Honda Accord. The idle air screw on the
    throttle body had loosened causing the engine to rev up. The computer
    would then try to bring the idle down, the net result was a flucuation
    in idle between 1,000 and 1,500 rpm. So you might want to check the
    screw (was on left side of throttle body opening on the '92), I think
    the normal idle speed should be around 750rpm. I just turned the
    screw clockwise until I reached that rpm and the revving stopped.

    Good luck.
     
    John W., Dec 5, 2003
    #13
  14. CPT BOYZ

    CPT BOYZ Guest

    (John W.) wrote in
    Figured it out!!!! The EACV was gummed up (to use that term), cleaned
    with carburator/choke cleaner and put back on. Car ran Great!!!!
    Thanks for all the tips and tricks
     
    CPT BOYZ, Dec 13, 2003
    #14
  15. CPT BOYZ

    CPT BOYZ Guest

    (John W.) wrote in
    Figured it out!!!! The EACV was gummed up (to use that term), cleaned
    with carburator/choke cleaner and put back on. Car ran Great!!!!
    Thanks for all the tips and tricks
     
    CPT BOYZ, Dec 13, 2003
    #15
  16. CPT BOYZ

    N.E.Ohio Bob Guest

    Can you interpret 'EACV' for me? I own an LX-i, and would like tocheck
    this on my car. Thanks, bob
     
    N.E.Ohio Bob, Dec 13, 2003
    #16
  17. CPT BOYZ

    N.E.Ohio Bob Guest

    Can you interpret 'EACV' for me? I own an LX-i, and would like tocheck
    this on my car. Thanks, bob
     
    N.E.Ohio Bob, Dec 13, 2003
    #17
  18. CPT BOYZ

    CPT BOYZ Guest

    EACV--> Electronic Air Control Valve. It is located on the front side
    of the PGM-FI. It has a power connector top right and a inlet out let
    hoses on the bottom side of it. It is held on by two bolts. The right
    one is easy to take off, the left will hit the vacuum rail.
     
    CPT BOYZ, Dec 13, 2003
    #18
  19. CPT BOYZ

    CPT BOYZ Guest

    EACV--> Electronic Air Control Valve. It is located on the front side
    of the PGM-FI. It has a power connector top right and a inlet out let
    hoses on the bottom side of it. It is held on by two bolts. The right
    one is easy to take off, the left will hit the vacuum rail.
     
    CPT BOYZ, Dec 13, 2003
    #19
  20. CPT BOYZ

    N.E.Ohio Bob Guest

    Thanks! bob

     
    N.E.Ohio Bob, Dec 13, 2003
    #20
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