94 Honda Accord - shaking a lot!

We're on our third mechanic right now trying to figure out why our 94 Honda Accord EX (manual, 110,000 miles) is shaking. Here is the letter I left with the mechanic, if anyone has experienced this before,
please let me know!
The Honda has been shaking for the past couple of weeks. First, We replaced the spark plugs and wires ourselves and it didn't fix the problem.
Second, We took it to our mechanic and he was unable to diagnose the problem but referred us to a transmission specialist because he thought it might be in the pinch plate in the clutch. The clutch was replaced 1.5 years ago.
We then took it to the transmission specialist and his best guess was either: -    a problem with the engine mount -    one or two of the front axles, but he was unable to tell if the axle was damaged and told us that it would be more cost effective to put two new axles on as opposed to the labor it would cost just to diagnose the issue. We weren't willing to go with this option because we didn't want to pay $300 dollars to have something done that may or may not fix the issue.
I spoke to a neighbor who referred me to you.
Here's what I can tell you: - The shaking usually begins after I've been driving it for over a mile. - The shaking comes and goes, with minor or major intensity. But it will throb continuously 8 to 10 times before it snaps back out of it (or i take my foot off the gas). - The shaking will go away if I take my foot off the gas.
Any thoughts? The third mechanic just called us back and he is clueless as well. He's going to talk to some of his Honda mechanic friends and call us back. -
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Have you had the ECU codes read? has the Check Engine Light(CEL) come on?
At 100K miles,your O2 sensor is probably slow. They cost about $70-100 online,use OEM.
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Jim Yanik
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Sounds like you may have plugged EGR ports.
Please discribe the condition in more detail.
Does it shudder on off idle acceleration warm? Unplug the EGR valve (MIL Light will come on and need to be reset) and drive. If the condition is now gone, you need to have the EGR ports cleaned by a proffesional honda tech. Dont forget to plug the EGR valve back in and reset the light.
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wrote:

Hi everyone - problem solved. Check engine light never came on.
Too much gas was getting to the engine so our mechanic put a specific sized ball bearing into the distribution tube to restrict the amount of gas intake. Thanks for your help.
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that sounds like a kludge rather than "problem solved".
Is this a fuel injection system? Then the injectors should be determining how much fuel the motor gets.
I would not be surprised that your O2 sensor is getting slow. They only last for 60K to 100K miles.
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Jim Yanik
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