Michael Mayville, Jan 19, 2017 #3. Noise from under vehicle after turning off the engine Approximately five hours after the engine is turned off, you may hear sound coming from under the vehicle for several minutes. I opened the garage door started the HL up and shut it off and the sound went away. Turned the truck on except the engine, then back off, and the humming stopped. This is the sound of a fuel evaporation leakage check and, it does not indicate a malfunction. The other night, my wife popped her head into the garage to throw something in the recycle bin and heard a buzzing noise. ... Tacoma, Highlander, 4Runner, Rav4 and more! EDIT: found the answer to this one on page 8 of the manual (doh!) It took a corporate complaint for someone to finally explain to me why my Taco popped everytime I would turn off the engine. But as I tracked the noise down, it was coming from underneath the rear of the 4R above the spare tire. Sometimes it lasts only 2-3 seconds and then quits and once or twice it seemed to last 6-7 seconds. The problem is intermittent which makes diagnosing difficult. She asked me what it was. Noise: Banging or clunking while making a turn, backing up, or rapid deceleration (like on a freeway off-ramp).Noise gets worse in warmer weather Cause: Posi chatter due to improper lubrication; worn clutches or spider gears; improper assembly Noise: Banging, crunching, or popping while making a turn. like this. I just heard the same sound coming from mine when I walked in the garage a few minutes ago. Check out this list for the most common problems 4Runner owners face. Hello. Toyota 4Runner: Noise from under vehicle after turning off the engine. “Approximately five hours after the engine is turned off, you may hear sound coming from under the vehicle for several minutes. My pump makes a popping noise when I turn off my vehicle. Toyota 4Runner Owners Manual / For your information / Noise from under vehicle after turning off the engine. For the past couple months, I have experienced issues with a humming/buzzing noise (similar to the sound of the old GM seatbelt signal, but at a much lower volume) coming from the engine (don’t know exactly where), but the engine is OFF, with NO key in the ignition. I've been trying to diagnose this issue I've been having since the purchase of my 2000 4Runner 3.4l 4WD. Explore Our Forums. I have 2008 Toyota Rav4, 4 Cyl, with 100,000 miles. Noise not affected by temperature Cause: Badly worn or broken spider gears Buzzing noise even though it’s turned off! Approximately five hours after the engine is turned off, you may hear sound coming from under the vehicle for several minutes. whippersnapper02 Negative Nancy. B-Man and B.C. Full Forum Listing. Turns out it is the fuel pump doing a pressure test and is completely normal. Whether you already own a 4Runner or are looking to buy one, simply being aware of the most common problems this vehicle has can help you prepare or prevent. So I have noticed on a few occasions, not all, after pulling into the garage and turning off the engine I hear a buzzing or humming coming from the engine. When I'm cruising over 10 mph and on the gas, everything is cool, but when I left off the gas you wait one second and you can hear this grinding/whirling sound. I was worried what this noise was. It had been 7 hours since I last drove it. Note: The list of problems below is organized by vehicle generation. That was the first time it's happened and hasn't happened since. I have an outdoor light timer that makes a faint buzzing noise and thought it was that.
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