horrible idle / engine shake after car audio install - Toyota Yaris Forums

Split · 04-28-2011, 11:17 AM

So last night I was looking for something to do and i found some old audio equipment, which I decided to install in my wife's yaris.

1) 4channel ampline amp mrv-something -- powering the factory speakers (extremely low gain)
1) 2channel low-end rock fosgate amp bridged powering 1 10" rockford fosgate subwoofer

When I hooked this all up, the car starts to shake terribly when in drive and holding the brake. if i open the hood, the engine is violently shaking back and forth. It doesnt seem to happen in park or neutral, only in Drive when the brakes or ebrake are engaged.

Any suggestions?

Lil Abner · 04-29-2011, 07:39 AM

Did you take anything apart? Did you remember to tighten the battery bolts down? Did you knock any sensors loose? Unplug any engine sensors? Knock any hoses loose? Does it do it when the stereo is off? Trying first to see if it has anything to do with stereo, and not some other problem that just so happen to come up. :-)

highwaypass · 04-29-2011, 08:48 AM

i think you should check the electricity system,especially the spark plugs coil. CMIIW

mazilla · 04-29-2011, 10:42 AM

After you inspect everything for mistakes, try a ground kit, DIY or Ebay for about 20.00...it can't hurt.

_S7V7N_ · 04-30-2011, 01:01 PM

Do you still have the stock battery ?

defecta · 09-11-2011, 01:50 AM

I am having the same problem after disconnecting the battery before inspecting the factory speaker setup. I have absolutely no mods or changes to the stereo or electricals.

Would I be right in thinking it's just the engine management software having forgotten it's settings? Is it just a matter of time before it corrects itself?

Cheers.

marcus · 09-11-2011, 08:39 AM

Bet it's the air fuel mixture that the ecu have to get use to.. 20 minutes drive fixes it

BLH · 09-11-2011, 12:42 PM

After they disconnected my battery during a repair.
My 2007 had to relearn the characteristics of the car and did run poorly at first.

Though I never got any violent engine shakes.

Split · 03-02-2012, 11:03 AM

^ i took apart the intake and thoroughly cleaned it and the MAF. once i put it back together and reset the ECU everything seems to be fine. I guess it was just a coincidence that it happened right when we installed the stereo.

04-28-2011, 11:17 AM	#1
Split Drives: 2008 Yaris Sedan Join Date: Oct 2008 Location: Edmonton Posts: 393	horrible idle / engine shake after car audio install So last night I was looking for something to do and i found some old audio equipment, which I decided to install in my wife's yaris. 1) 4channel ampline amp mrv-something -- powering the factory speakers (extremely low gain) 1) 2channel low-end rock fosgate amp bridged powering 1 10" rockford fosgate subwoofer When I hooked this all up, the car starts to shake terribly when in drive and holding the brake. if i open the hood, the engine is violently shaking back and forth. It doesnt seem to happen in park or neutral, only in Drive when the brakes or ebrake are engaged. Any suggestions?

04-29-2011, 08:48 AM	#3
highwaypass Captain Slow Drives: '08 1.5 hatchback Join Date: Dec 2008 Location: Jakarta Posts: 145	i think you should check the electricity system,especially the spark plugs coil. CMIIW __________________ There's only 1 brand,2 drive,3 words,4 you: TO-YO-TA

04-29-2011, 10:42 AM	#4
mazilla advocatus diaboli Drives: 07 Yaris hatch Join Date: Mar 2011 Location: San Jacinto California Posts: 1,126	After you inspect everything for mistakes, try a ground kit, DIY or Ebay for about 20.00...it can't hurt. __________________ -Type 07 FFL- My odometer 03/11 http://i205.photobucket.com/albums/b...a/2843ed85.jpg

04-30-2011, 01:01 PM	#5
_S7V7N_ Drives: Yaris 4 Door Sedan Join Date: Dec 2008 Location: South Texas Posts: 805	Do you still have the stock battery ? __________________ Audio is under Construction Kenwood KDC-X794 Hifonics Zeus ZXI6.5C 6.5-Inch 2-Way Component Speaker System - AUTOTEK ATX65CX 6.5-Inch Hifonics BXi 1210D - Crunch PowerZone P1400.4 (2)12 inch Kicker CVR's - 0 gauge from battery to Distribution block - 4 Gauge Power/Grounds to amps - Duralast Yellow Top - Big 3

09-11-2011, 08:39 AM	#7
marcus toyota View User's Garage Drives: 2007 Yaris RS Blazed Join Date: Oct 2006 Location: toronto, canada Posts: 3,637	Bet it's the air fuel mixture that the ecu have to get use to.. 20 minutes drive fixes it __________________ If my calculations are correct, when this baby hits eighty-eight miles per hour... you're gonna see some serious shit!!!!!! "Horsepower is how fast you hit the object. Torque is how far you move that object.."

04-29-2011, 07:39 AM	#2
Lil Abner Drives: 2009 3dr LB Manual Join Date: Mar 2010 Location: Dublin, Ohio Posts: 412	Did you take anything apart? Did you remember to tighten the battery bolts down? Did you knock any sensors loose? Unplug any engine sensors? Knock any hoses loose? Does it do it when the stereo is off? Trying first to see if it has anything to do with stereo, and not some other problem that just so happen to come up. :-)

09-11-2011, 01:50 AM	#6
defecta View User's Garage Drives: 2005 'Silver lining' Yaris YRS Join Date: Jul 2010 Location: melbourne, straya Posts: 14	I am having the same problem after disconnecting the battery before inspecting the factory speaker setup. I have absolutely no mods or changes to the stereo or electricals. Would I be right in thinking it's just the engine management software having forgotten it's settings? Is it just a matter of time before it corrects itself? Cheers.

09-11-2011, 12:42 PM	#8
BLH Drives: 2007 Yaris Sedan Join Date: Apr 2009 Location: CT Posts: 271	After they disconnected my battery during a repair. My 2007 had to relearn the characteristics of the car and did run poorly at first. Though I never got any violent engine shakes.

03-02-2012, 11:03 AM	#9
Split Drives: 2008 Yaris Sedan Join Date: Oct 2008 Location: Edmonton Posts: 393	^ i took apart the intake and thoroughly cleaned it and the MAF. once i put it back together and reset the ECU everything seems to be fine. I guess it was just a coincidence that it happened right when we installed the stereo.

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