Question about 1999 Lexus LX470

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Vehicle vibrates on reaching 40 mph.dashboard shows check engine

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It sounds like you have a misfire condition. It is probably time for a tune-up. Lexus recommends spark plugs at 60K and the timing belt replaced 100k for your 470. hope this helps.

Posted on Aug 30, 2010


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Noise from front end at exactly 40 mph 2008 trailblazer

check your engine mount for play as a weak mount causes exhaust to vibrate could also be a heatshield not fitted properly

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Vehicle vibrates on reaching 40 mph.dashboard shows check engine

That vehicle should have an OBD2 connecter for the check engine light, go to your nearest auto parts store and have them pull the code then go from there.... your better off that way you don't buy parts that you do NOT need. The computer will tell you exactly what is going on...... the reasoning for the check engine light to come on because there is a malfunction/problem detected

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2001 BMW 325i Rattling / vibrating and iddle drop at 2000 RPM and 40 MPH

check for problem drive line "U" joints or cv joints

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Bad vibration tends to go away when vehicle reaches 40 + mph.

jere are a list of potential causes of your problem
1-wheel balance
2-bad tire
3-need alignment
4-worn shock
5-worn suspension components

wheel balance is the cheapest repair

Good luck

Oct 05, 2010 | 2006 Ford Escape

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My car sputs and makes a clicking sound when you drive over 40 miles

You can get a free scan at Autozone or Oreillys. If the "Check Engine" light is not on you may still have a defect recorded. It sounds like the clicking may be an Electric solenoid with bad contacts. Since the overdrive is suppose to activate at 40 mph and higher, the sputs you refer to is the vehicle failing to reach the final gear.

You can test this by disabling the overdrive with the button on the stem of the gearshift. If you can reach 40 mph and higher without complaint you have found the problem. Your vehicle will run well enough to take it in for repair. It will use more fuel and the engine will race more without Overdrive.

If the vehicle still sputs without Overdrive, then it is most likely a Pollution Solenoid that is interfering with the EGR system. It can also be a bad sparkplug wire or coil. Those parts sometimes short out at certain speeds and work perfectly good at other speeds. It takes just the right condition to show up.

I have tried to give you all the possibilities with the most likely first. The free scans would help you if you want to fix it yourself. Or you can use the free scans to verify what a Repair shop tells you.

Sep 13, 2010 | 2005 Ford Expedition

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Check engine light has come on. Truck running okay except when reaching 30-40 mph starts to vibrate and then works thru it pushing excelerator down for more power, engine stops jumping.

this is because of the critical RPM. in particular RPm it coincides with the resonants frequency. Due to this the vibration may occur. then when you overcome this RPM then it runs normally. please try not to run your truck in that particular RPM

hi if you feel the information which i gave is useful please vote me

Jul 10, 2010 | 1998 Ford Ranger SuperCab

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From a stand still if you accelerate hard vehicle starts vibra

Well, kind of short on description, issues typical in this complaint are misfiring and U joints.

To emininate the engine, does the vibration happen on power braking, without the vehicle moving?

May 24, 2010 | 2000 Chevrolet Blazer

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Vibration when idling and between 40-70 mph

check out harmonic balancer .

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Mazda b2200, 1989 109000 miles. Vibration, seems to be in the front end, when moving between 30-40 mph, 3rd or 4th gear. Vibration still exists when not in gear, manual transmition. Tires are new and...

I have the same thing but mine is between 45-50 mph. I read about this a while back in a magazine for people that pull campers, the problem exists in all vehicles although its not as noticeable in every thing you ride in. There is a certain "point" at which your speed and engine speed reach, that causes a phenomonon that causes a vibration. Engineers relate it to "harmonics" which is a similar issue but in the electronic field of study. There is nothing you can do for it, and it varies from unnoticeable in some vehicles to driving you insane in my 1989 Mazda B2200. I had an '89 Ford F-150 that did it at 35 mph and a 2001 Dodge Diesel that did it at 45 mph, but those were the only three vehicles I've ever driven and noticed it.

Jul 17, 2008 | Mazda B2200 Cars & Trucks

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