Vibration at 2000 rpm

My 1993 Camry vibrates when the engine runs at about 1800-2000 rpm while I push the gas paddle. The noise is loud. I can feel obvious vibration from the gas paddle. This vibration is not related to car speed (mph). In other words, no matter I drive at 30mph or 60mph, it vibrates if engine speed is about 2000rpm. Vibration disappears outside this range. Anyone has a clue?

100 k miles
New tires
Wheels aligned
New struts
New axels

Does it vibrate when the car is stopped and the transmission is in neutral and the rpm is at 1800-2000 rpm?

If it's vibrating:

Start by replacing, or rebuilding the dogbone mount.


If it is running like crap, start with ignition testing. (Plugs, cap & rotor, timing - wires)

If you're saying the "noise" is loud then you may have an exhaust leak that resonates around 1800 rpm or a loose heat shield etc..

If it's vibrating:

Start by replacing, or rebuilding the dogbone mount.


If it is running like crap, start with ignition testing. (Plugs, cap & rotor, timing - wires)

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Thank you.
I've heard motor mount, engine mount ... now dogbone mount. Are they different?

Does it vibrate when the car is stopped and the transmission is in neutral and the rpm is at 1800-2000 rpm?

Good question.
I have tried and forgot to mention in last post. When the car is stopped and shifted to neutral, vibration gets worse at 1800-2000rpm but not as bad as the car is moving. In fact, if the car coasts at 1800-2000rpm (car moves but gas paddle is not pressed) the vibration is not obvious either. The worst case is when the engine is under load (try to accelerate it) at 1800-2000rpm.

The ENGINE MOVING CONTROL ROD is Toyota's name. You may be more familliar with a "torsonal engine mount". Whatever the name, it's the top engine mount that looks like a dogbone. It connects the engine to the passanger wheel well.

For every action there is an equal and opposite reacation. Because the crankshaft spins one way, the engine, naturally, wants to spin the opposite direction.
Step on the gas (increase the torque) and the engine will rock one way, slow the rotation and it rocks the other way.

The purpose of the mount is to keep the engine from rocking around. Normally when the mount wears out, the engine rocks around & you get vibrations from the engine/drivetrain.

Hi

I have exactly the same problem like yours. My camry's vibration range is 1900-2000 RPM. It turned out that the vibration was caused by a broken exhaust pipe BRACKET on the front exhaust pipe (ie just below the engine). You have to inspect all the exhaust brackets carefully as I have gone thru several mechanics but they have all missed spotting this broken bracket.

I have the broken bracket welded back and my problem is solved. Hope this helps.

Hi

I have exactly the same problem like yours. My camry's vibration range is 1900-2000 RPM. It turned out that the vibration was caused by a broken exhaust pipe BRACKET on the front exhaust pipe (ie just below the engine). You have to inspect all the exhaust brackets carefully as I have gone thru several mechanics but they have all missed spotting this broken bracket.

I have the broken bracket welded back and my problem is solved. Hope this helps.

Thank you, tanyt.
I forgot to mention that I had my exhaust pipe replaced a few month ago. After reading your comments, I checked the connection and did find leakage at the flange between the engine and exhaust pipe. The mechanic who did the job has fixed the problem last week (gasket replaced and bolts tightened). The vibration still exists (now at 2000-2100rpm) but the noise is greatly reduced.

Thank you again.

Hello again

The exhaust support bracket which I mentioned before is on the second connection on the front exhaust pipe. This thin plate like support bracket is located on top of the pipe at 12 o'clock position and is welded to the car body.

You may need a torch light to inspect carefully inorder to see if it is broken.