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How to fix vulve - 2004 Toyota Highlander

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I assume you mean valve. It depends on what needs to be fixed on it. If it just needs a valve seal or Spring it can be done with a compressor to keep the valve in the closed position while you remove, install and cut the new seal. If it is anything else you will have to remove the head assembly and that is a rather involved process. For more details and instructions on how to do the repairs on the head I recommend the Haynes Repair manual which you can get at most major auto parts stores or the Chilton's repair manual on your vehicle. Both of these provide detailed instructions on how to do Valve repairs. Good Luck.

Posted on Sep 14, 2010

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Posted on Jan 02, 2017

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Engine idle very lumpy and wanting to stall on gear down shift. Sometimes poor on starting until fuel gets through then car runs well but very smelly.


SYMPTOM 1: ROUGH IDLE IN THE COLD

The engine will not idle smoothly, or it stalls during idle when the engine is cold. When the engine is cold and you take your foot off the gas pedal, the engine runs very rough and may even stall. When you run the engine at higher speeds, it seems to run fine, or at least it runs more smoothly.
Possible causes:
  1. If you have a carburetor, you may have a bad accelerator pump or power circuit.
    The Fix: Replace accelerator pump or replace the carburetor.
  2. There may be a vacuum leak.
    The Fix: Check and replace the vacuum lines as required.
  3. There may be some type of ignition problem.
    The Fix: Check and replace the distributor cap, rotor, ignition wires, and spark plugs.
  4. The ignition timing may be set wrong.
    The Fix: Adjust the ignition timing.
  5. There may be a fault in the computerized engine control system.
    The Fix: Check engine control systems with a scan tool. Test the circuits and repair or replace components as required.
  1. The EGR valve may be bad.
    The Fix: Replace the EGR valve.
  2. The engine may have mechanical problems.
    The Fix: Check the compression to determine the engine's condition.
  3. Idle speed is set incorrectly.
    The Fix: Set idle speed to the car's original settings.
  4. The fuel injectors may be dirty.
    The Fix: Clean or replace the fuel injectors.

SYMPTOM 2: ROUGH IDLE WITH WARM ENGINE

The engine will not idle smoothly, or it stalls during idle when the engine is warm. When the engine is warm or hot and you take your foot off the gas pedal, the engine runs very rough and may even stall. When you run the engine at higher speeds, it seems to run fine.
Possible causes:
  1. If you have a carburetor, you may have a bad accelerator pump or power circuit.
    The Fix: Replace accelerator pump or replace the carburetor.
  2. There may be a vacuum leak.
    The Fix: Check and replace vacuum lines as required.
  3. The fuel pressure regulator may be operating at too low a pressure.
    The Fix: Check the fuel pressure with a fuel pressure gauge. Replace fuel pressure regulator. (This is not really a do-it-yourself kind of job.)
  4. Idle speed set incorrectly.
    The Fix: Set idle speed to specs.
  5. There may be some type of ignition problem.
    The Fix: Check and replace distributor cap, rotor, ignition wires and spark plugs.
  6. There may be a fault in the computerized engine control system.
    The Fix: Check engine control systems with a scan tool. Test circuits and repair or replace components as required. (This is not really a do-it-yourself kind of job.)
  7. The EGR valve may be bad.
    The Fix: Replace EGR valve.
  1. The engine may have mechanical problems.
    The Fix: Check compression to determine engine condition.
  2. The fuel injectors may be dirty.
    The Fix: Clean or replace fuel injectors.

SYMPTOM 3: FAST IDLING

The engine idles too fast. After the engine has run long enough to become warm, the idle speed does not come down to normal. You really notice it when you come to a stop and must have to push ******* the brake pedal to keep the car from moving.
Possible causes:
  1. If you have a carburetor, you may have a bad accelerator pump or power circuit.
    The Fix: Replace the accelerator pump or replace the carburetor.
  2. The engine may be overheating.
    The Fix: Check and repair the cooling system.
  3. The fuel pressure regulator may be operating at too low a pressure.
    The Fix: Check fuel pressure with a fuel pressure gauge. Replace fuel pressure regulator. (This is not really a do-it-yourself kind of job.)
  1. The ignition timing may be set wrong.
    The Fix: Adjust the ignition timing.
  2. There may be some type of ignition problem.
    The Fix: Check and replace the distributor cap, rotor, ignition wires and spark plugs.
  3. There may be a fault in the computerized engine control system.
    The Fix: Check the engine control systems with a scan tool. Test the circuits and repair or replace the components as required.
  4. There may be a vacuum leak.
    The Fix: Check and replace vacuum lines as required.
  5. You have a bad idle speed control unit.
    The Fix: Replace the idle speed control unit.
  6. The alternator may not be working properly.
    The Fix: Replace the alternator.

SYMPTOM 4: STALLING UPON STOPPING

Car stalls when stopped quickly. You are driving along and everything is just fine ... until you let off the gas pedal and apply the brakes. The engine starts shaking and may even stall. Not a good thing to happen because you lose power steering when the engine dies and could risk an accident.
Possible causes:
  1. There may be a serious vacuum leak.
    The Fix: Check and replace the vacuum lines as required.
  2. There may be a fault in the computerized engine control system.
    The Fix: Check the engine control systems with a scan tool. Test the circuits and repair or replace the components as required. (This is not really a do-it-yourself kind of job.)
  3. Broken linkage.
    The Fix: Repair or replace the linkage as required.
Idling issues can be very frustrating, but with some patient troubleshooting, you'll have a real chance at figuring it out. Remember to always check your engine idle with the air conditioning and defroster turned off, as both of these systems are designed to change the idle when they are on due to the air conditioning system's demands on the engine.

Aug 25, 2017 | Cars & Trucks

4 Answers

What is the fix


The fix is typically not the problem but the opposite

Dec 13, 2015 | Cars & Trucks

1 Answer

What causes a pulley on a serpentine belt to stop turning and how can I fix the issue?


The bearings on the idler or tensioner pulley have given up. No cheap fix here. You should fix it now or be prepared to fix a few more things later.

Sep 17, 2014 | 1996 Buick Riviera

1 Answer

Where is the a/c vulve


Check on the left hand side behind the radiator.

Jun 28, 2012 | 2005 Chrysler Town & Country

1 Answer

My dodge journeys cd player say


My cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix thisMy cd player says MECH COMM ERROR, how can i fix this

Jan 03, 2012 | 2010 Dodge Journey

1 Answer

I got same problem on my 99 chrysler concorde.


i havent fixed this problem yet,i have different people tell me its the fuel pump,thermostat,sensor,waterpump..but i cant just fix all this things ,i dont have that much money to be fixing things that dont need to be fixed...

Jul 19, 2009 | 1999 Chrysler Concorde

1 Answer

2005 nissan sentra how I can replace vent vulve in a gas tank


you can't if you want to do this you must replace the whole tank.

Jul 15, 2009 | 1993 Nissan Sentra 4 Door

1 Answer

Codes


RF2560 -  Remote Keyless Entry Validation fault - dealer fix RS0061 -  Right front position sensor fault - dealer fix IP1552 - KAM error (keep alive memory) power loss to instrument panel? - dealer fix IP2419 - instrument panel (unsure) 
I would talk with a dealer re fixes to all these codes. Unless you're a great mechanic and understand advnanced principles of electronics, let the experts fix your expensive (or to fix at least) car.
Sorry not to have better news. Community colleges offer cheap classes in auto repair...
Paul

Nov 01, 2008 | 1996 Cadillac DeVille

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