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Why is my Engine shaking in idle?

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Old 07-21-2011, 05:59 PM   #1
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Why is my Engine shaking in idle?

When im idling my engine shakes the entire truck.
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Old 07-21-2011, 06:06 PM   #2
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coil pack/spark plug
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Old 07-21-2011, 06:13 PM   #3
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When was the last time you changed the spark plugs?
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Old 07-21-2011, 06:24 PM   #4
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manual says its due at 100k im at about 68k right now.
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Old 07-21-2011, 06:31 PM   #5
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I had a 2000 Lexus LX470 before my taco and i had the same thing. It was the ignition coil(sits right ontop of the spark plug) you can fix it yourself just go to an auto zone or some place that will read your codes and it should tell you the cylinder, find out the firing order(google it) Its idling really rough and then when you get on the gas you dont notice it right? do you have a check engine light at all?
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Old 07-21-2011, 06:34 PM   #6
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sorry i just re read all of your post, I also replaced all the plugs before i did all this and it didnt help. my truck had like 160k on it though. but i shit one and then two months later i shit another one the first one i took to the dealer (stupid)it cost $400 granted they rape you when you own a lex. the second i did myself $125 for the coil and about 40 min of work if that
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Old 07-21-2011, 06:38 PM   #7
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http://www.rockauto.com/dbphp/x,carc...tion_Coil.html
heres a link DENSO is the OEM part the dealer would use on here its $65 might be able to find it cheaper somewhere else
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Old 07-21-2011, 06:56 PM   #8
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only light i have on is the tire pressure light, think one of the sensors maybe broken. thanks for the advice. If i have a weekend off then ill do it my self. cant afford to miss work, so i'm a little hesitant on working on my truck.
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Old 07-21-2011, 07:01 PM   #9
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Quote:
Originally Posted by chicagocontractor View Post
manual says its due at 100k im at about 68k right now. My mechanic says he would replace them for 165, is that a fair price for a 4 cylinder?
Too much for a 4 cylinder.
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Old 07-21-2011, 07:09 PM   #10
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Quote:
Originally Posted by chicagocontractor View Post
only light i have on is the tire pressure light, think one of the sensors maybe broken. thanks for the advice. If i have a weekend off then ill do it my self. cant afford to miss work, so i'm a little hesitant on working on my truck.
Check your spare
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Old 07-21-2011, 07:10 PM   #11
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These toyotas carry to much power
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Old 07-21-2011, 07:16 PM   #12
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Quote:
Originally Posted by chicagocontractor View Post
only light i have on is the tire pressure light, think one of the sensors maybe broken. thanks for the advice. If i have a weekend off then ill do it my self. cant afford to miss work, so i'm a little hesitant on working on my truck.
Well im no mechanic but i did drive mine a couple of days before i got it fixed too i dont know if it messed up anything i assume it wasnt very good with one cylinder not firing. but an easy weekend fix if ya got the time off and hell you can pull the coils and check them just like you would with a plug just pull it and leave the quick connect connected and have smoe one turn it real quick while you ground it on the frame or block or whatever you only have 4 to check!
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Old 07-21-2011, 07:24 PM   #13
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Unplug a coil; start the truck and if it runs the same (just as poorly as it did and not any worse) you just found the bad coil. If you unplug a good coil it will run even worse. Get a good used coil from a wrecking yard or buy a new one if you like.

You can change the plugs, it's easy, really. Don't overtighten the plugs; snug em in nicely.
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Old 07-21-2011, 07:36 PM   #14
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Quote:
Originally Posted by Steves104x4 View Post
Unplug a coil; start the truck and if it runs the same (just as poorly as it did and not any worse) you just found the bad coil. If you unplug a good coil it will run even worse. Get a good used coil from a wrecking yard or buy a new one if you like.

You can change the plugs, it's easy, really. Don't overtighten the plugs; snug em in nicely.
Yeah that works too
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Old 07-21-2011, 07:58 PM   #15
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If you dont have an engine light, and its a very little amount of shaking, it could very well be normal....
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Old 07-22-2011, 07:42 AM   #16
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Quote:
Originally Posted by jivewalker View Post
Check your spare
Forgot about my spare!
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Old 07-22-2011, 08:36 AM   #17
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Quote:
Originally Posted by chris4x4 View Post
If you dont have an engine light, and its a very little amount of shaking, it could very well be normal....
x2. Anything bad would display error. So its most likely normal wear on the engine.
You can try different fuel.
Check air filter.
Check engine mounts. Engines do shake but if too much of shake transfers to cab you may have bad rubber in the engine mount.
Check power steering fluid since that could be putting extra load on engine.
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Old 07-22-2011, 08:47 AM   #18
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lol a motor mount?

if a motor mount is broke it will shake during idle....

put on the parking brake, open the hood have someone watch the engine and look for where its moving. put it in drive (with the brake on) and gas on gas off gas on gas off really quick. that should show you where its at
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Old 07-22-2011, 09:19 AM   #19
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Quote:
Originally Posted by chicagocontractor View Post
manual says its due at 100k im at about 68k right now. My mechanic says he would replace them for 165, is that a fair price for a 4 cylinder?
way too much. . . You can get four plugs for about $20. Then it's just a matter of if you can use a ratchet/socket.
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Old 07-22-2011, 10:09 AM   #20
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It's easy to test plugs/rotor but those should thrown an engine light. The only thing I can think of that could cause excessive shake without throwing a light is the motor mounts. Which will shake more at idle then at working speed. Check those ..
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