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01-06-2015, 05:54 PM | #1 |
Bronze bombshell yaris
Drives: 09 Yaris HB 3door Join Date: Sep 2010
Location: Oklahoma City, OK
Posts: 641
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Wet slappy sound coming from engine at low RPMs when accelerating.
So I've noticed that my Yaris is making an odd sound. I have an AT transmission and when at low RPMs I push down on the gas pedal and a "wet slappy" sound comes from the engine. Almost like wetting your lips and making a low slobbery fart sound from your mouth... (I know, its the best way I can describe it hehe) It goes away completely once the RPMs come up a little. It can happen in any gear, as long as its low RPMs and I am pressing on the gas. It seems to get worse if I barely press on the gas rather than more aggressively pressing down.
I thought it might be the ultra-cheap ethanol gas I use, so the last three tanks I've filled it from empty to full with super premium no ethanol gas. Its still doing it. Any ideas?
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Now I drive a CARMINE RED METALLIC 09 Yaris 3-door!! I'm Back!!! WooHoo!! Mods done so far: Tinted windows, Viper 211HV Remote Keyless Entry, Atoto Android headunit, backup camera, steering wheel controls Before it was totaled I drove a 2007 Black Sand Pearl 3 Door Lift-Back M/T with 49k miles. Stock Everything except for black tint, all red badges, red dash, and stealth garage door opener. Ultra-Gauge mounted on steering wheel. A1 Electric MES Central Locks and Avital 3100 Alarm system. |
01-06-2015, 05:57 PM | #2 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Does it just do it in motion or will it do it sitting as well?
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01-06-2015, 09:03 PM | #3 |
Join Date: Feb 2010
Posts: 603
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I would suggest that you have an assistant start the car while you stand in front of the car with the hood open. Try to locate the general vicinity of the engine compartment the sound is coming from. You may even be able to see something bubbling at a fitting or something like that.
Yaris farts...for some reason I think of some of those Yaris Sanchez photos that pop up when googling "Yaris" Last edited by bairjo; 01-07-2015 at 12:31 AM. |
01-06-2015, 11:19 PM | #4 |
DIYer
Drives: yaris 1.5 MT Join Date: Oct 2014
Location: perth, WA, straya
Posts: 22
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possibly an exhaust leak? a video would be helpful
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01-08-2015, 09:38 AM | #5 |
Bronze bombshell yaris
Drives: 09 Yaris HB 3door Join Date: Sep 2010
Location: Oklahoma City, OK
Posts: 641
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Hey all sorry for the delay in responding. It does not seem to do it while sitting still. It seems that it only does it when under load when trying to get past the very bottom of the RPM range when giving it a little gas. After getting past that it does not make that sound at all.
I was going to say that its so subtle that I'm not sure if I could get it on video, but I was in the drive through at Micky-D's this morning and with the window open and next to the building, the sound was reflecting off the wall and it was quite noticeable when pulling up to the next (2nd) window. I'm not sure how I would get a video of the sound if its so subtle inside the car while accelerating, but I will try today sometime.
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Now I drive a CARMINE RED METALLIC 09 Yaris 3-door!! I'm Back!!! WooHoo!! Mods done so far: Tinted windows, Viper 211HV Remote Keyless Entry, Atoto Android headunit, backup camera, steering wheel controls Before it was totaled I drove a 2007 Black Sand Pearl 3 Door Lift-Back M/T with 49k miles. Stock Everything except for black tint, all red badges, red dash, and stealth garage door opener. Ultra-Gauge mounted on steering wheel. A1 Electric MES Central Locks and Avital 3100 Alarm system. |
01-08-2015, 05:50 PM | #6 |
ULTIMATE
Drives: 09 5dr LB, 2x 08 3dr LB Join Date: Oct 2008
Location: USA, CT
Posts: 13,460
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Check the axle boots for the CV joints. One may be ripped where it has a flap.
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01-14-2015, 09:36 AM | #7 |
Bronze bombshell yaris
Drives: 09 Yaris HB 3door Join Date: Sep 2010
Location: Oklahoma City, OK
Posts: 641
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OK, so after hearing it more clearly when beside McDonnalds in the drive through (sound reflecting off the side of the building) I've been trying to reproduce the sound every day as I go through the drive-through. After doing so, I think I have figured out what it is. Although from the interior of the car it sounds faint and "wet and slappy" as you might expect if you were to make a fart sound between with your mouth by blowing air between your cheek and teeth, from the outside it sounds "chirpy" and seems to be in line with what my daily belt squeal sounds like that happens when I start my car.
Yes I know that means a loose belt, and if I hadn't already tightened the darn thing 4 times to the best of my strength and a healthy pry bar on the alt, along with spraying that "no squeal" spray on the belt and pullys, I'd say you were right. But it seems no matter what I do (even buying two more of the same belt from AutoZone) it squeals. I've kinda just lived with it.
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Now I drive a CARMINE RED METALLIC 09 Yaris 3-door!! I'm Back!!! WooHoo!! Mods done so far: Tinted windows, Viper 211HV Remote Keyless Entry, Atoto Android headunit, backup camera, steering wheel controls Before it was totaled I drove a 2007 Black Sand Pearl 3 Door Lift-Back M/T with 49k miles. Stock Everything except for black tint, all red badges, red dash, and stealth garage door opener. Ultra-Gauge mounted on steering wheel. A1 Electric MES Central Locks and Avital 3100 Alarm system. |
01-14-2015, 10:03 AM | #8 |
Drives: '09 Yaris 3dr, 13 F150rcsb 5.0 Join Date: Oct 2008
Location: downtown Houston
Posts: 259
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I would highly recommend that said assistant and "beneficiary" not be one in the same.
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You are what you drive. |
01-15-2015, 09:52 AM | #9 | |
Drives: '08 2zr swapped Vios M/T Join Date: Oct 2012
Location: Caledonia Ont.
Posts: 2,938
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Quote:
I just bought mine from Canadian Tire (don't remember brand) and I have had absolutely no noise from the belt at all. I realized I had over tightened it so went back and loosened it a bit to not cause premature wear on puleys. There should be roughly 3/4" deflection of the belt when pressed on (if I remember correctly) |
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