Question about 2006 Scion xB

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When idling, the engine rattles

But not if it is in park and idling, it idles quietly. At stop signs, or when sitting with your foot on the brake, the engine sounds like a rattletrap. Are they all this way?

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  • Anonymous Dec 21, 2008

    sma eexact problem the hood is what is making the noise. but its because the motor is idling ruff. i tried to tighten my hood latch so even when it runs ruff it wont rattle but the hood latch wouldnt tighten any tighter. so i took some rubber and attached it to the hood latch instead. but the engine still idles ruff.

  • fixya444 Apr 27, 2009

    same problem

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I found this solution at:
http://en.allexperts.com/q/Toyota-Repair-832/f/2005-Scion-Xb-Rough.htm
Ricko wrote at 2008-07-10 18:36:22
Don't believe everything you hear! Too many Xperts out there! Ok, here's the deal. I have a Scion 2005 xb and a 2006 xb. To set up the idle, just look near the front of your engine close to the radiator fan. As you are facing the car with the hood up, near the right side of the engine, you should see the thin metal wire that gives your car gas when you depress the gas pedal. Have someone press the gas pedal quickly and you will see it move(even if the engine is off). Don't let them hold it down! Just a quick press/release or two. (You can also do this yourself if necessary, by pushing the small plastic wheel the cable rides on). Ok, after you locate the wire and the round plastic piece, locate the small nut that has a small "allen wrench" type screw in the center of it. You may see a small dot of yellow paint from the factory which shows the original location of the screw. FIRST, with a 5/16 or (equivalent millimeter) wrench, loosen the nut only slightly. SECOND, with a very small #2 size allen wrench, slightly TIGHTEN the screw until the rough idle smooths out(about 10 or 11 rpm's on the gauge inside on your odometer). DONE! Takes about 5 minutes and saves $$$ and time at the dealer!
You should have someone running the car to do this...BUT for safety reasons, be very careful not to get your hands near the fan which WILL PROBABLY COME ON!!!! And don't let someone depress and release the gas pedal while your hands are near the wire! You only need to tighten the allen screw about a half turn. After adjusting, give a quick depress of the gas pedal again to make sure it adjusts properly and seats. Remember, the higher you set the idle, the more gas you use and the quicker you overheat. So, set it at the very minimum that takes out the roughness(between 9 & 10 rpm's is ideal). Good luck, Ricko, New Smyrna Beach, FL

Posted on Sep 28, 2009

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This could be a number of things thats not really the engine itself. Sometimes when the air filter is replaced a small clip holding a hose on the air box can be slightly bent, causing it to rattle at a certain low rpm. That's whats causing it on mine. Also, the hood does rattle a little as well.

Posted on Mar 31, 2010

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