My 2001 toyota avalon starts to shake when im going about 45 mph and when sitting at a light it idels real low like it wants to die

Marvin

• 85242 Answers
• Posted on Dec 04, 2008

SOURCE: lurching at low speed take off

I would start by cleaning the inside of the Mass Air Flow sensor, dirt gets on the sensor element from the air going through and causes these kinds of problems, a company called CRC makes the spray cleaner for MAF's, any good auto parts store will have it, the MAF is located in the air intake hose to the engine. Another thing to check is the throttle valve and air bypass idle speed control valve for sludge, use the following procedure I have written to perform this.
Here is the most common cause of surges and stalls and low idle, it is the idle speed control air-bypass valve and throttle valve, they get full of gunk over the miles and cause idle issues (stalls) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

SOURCE: 2001 Toyota Avalon overheating please help!!!!

Your radiator fan stopped working maybe a blown fuse bad relay or radiator fan switch.When you drive the car get air and cools down when you are in park the fan is supposed to provide the air if needed but its not working. However the fan itself could be burnt out and may need to be replaced. Good Luck

SOURCE: idle too low on hot starts 2001 Avalon

Sounds like you idle air control valve is going bad. They start acting up on a hot engine due to sticking or high resistance through its internal windings. It will get to the point where the engine will stall every time you take your foot off the gas.
I suggest getting it replaced and the throttle body cleaned at the same time since it will need to be removed to replace the IAC.

SOURCE: Shaking during acceleration between 25-45 mph

are all of your spark plugs firing right?

SOURCE: 1999 toyota avalon horn works intermitely

I would suggest to you to have the spiral cable (or 'clockspring') replaced. This is the electrical unit that transfers power to the air bag, the horn and the cruise control.

It is located right under the seering wheel.

Your description of the issue indicates to me that your spiral cable is loose, and making intermittant contact. If the vehicle had an air-bag deployment, this cable-device should have been changed.