Viabration that goes away when heated up

I have a 2001 ZX3 woth 97K of most;y hi speed driving. LAtely when I start it in the morning it has a viabration which seems to be getting stornger.
Afetr I back out my draiveway and put it in forward it seems to go away and does appear until the next morning. I have not changed out the timiing belt yet but religiously change the oil and filter every 3000mi. Any ideas out there.
--
Lawrence M. Adler



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Just like a defective vibrator.
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Tune-up.
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Henri, why don't you learn the basics before making a fool of yourself. Plugs, wires, clean the intake, injector cleaner in the gas, fuel and air filter, check and maybe replace the O2 sensor, cooling system check (incorrect engine temp can cause running problems). The idea that cars don't need tune-ups any more is one of the main reasons why so many people are blaming their vehicles for running poorly when it's their own fault. No wonder you don't like your Focus. You'd probably feel the same about any vehicle unfortunate enough to be in your driveway.
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Hey Dave the TROLL, by making these boiler plate statements as in your last post, shows that you must be have been reading the dealers service board.
I have had many years experience servicing and repairing vehicles, both in this country and Europe, so I have learnt the basics, thank you for asking. And still learning the new and different additions of today's vehicles and engines.
Car manufacturers including Ford promote 100,000 mile tune ups & 100,00 miles Coolant change . In Europe 10,000 or 20,000 mile oil change intervals are the norm now. Have you thought of consulting with Ford as you appear to know more about servicing their vehicles than they do.
Your ability to be able to diagnose a problem with a vehicle over the internet leaves me speechless, I am impressed.
Remember folks any problems with rough running engine ""Tune UP"! Just take the car to the service place and tell the service Tech no need to diagnose, Dave says tune up will solve my problem..
As usual if someone disagrees with you, your reply to the poster with "making a fool of your self or calling people nasty names.
But to make the statement that "tune up" is the answer to this fellows problem is wrong and ignorant and shows that your knowledge about today's automobiles and engines is limited.
wrote

Henri, why don't you learn the basics before making a fool of yourself. Plugs, wires, clean the intake, injector cleaner in the gas, fuel and air filter, check and maybe replace the O2 sensor, cooling system check (incorrect engine temp can cause running problems). The idea that cars don't need tune-ups any more is one of the main reasons why so many people are blaming their vehicles for running poorly when it's their own fault. No wonder you don't like your Focus. You'd probably feel the same about any vehicle unfortunate enough to be in your driveway.
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Obvious lie. Beat it, troll.
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The problem is that you two are right and that Henri is quite agressive. A computer does not make a car run well if there is no engine, can it ? My limited experience taught me that a cold engine can vibrate because the plugs are so worn out that the spark won't be sufficient to ignite a rich mixture, therefore vibration because only three cylinders run out of four. After only a few seconds the mixture is better, and after a few minutes the engine itself has heated up, so the problem is not perceptible anymore. And this is just one single example to satisfy Dave. An other one, for and against Henri, is that a computer needs a regular reset manoeuver because, afer a while, it over calculates the engine data and gives out wrong information to the electronic commanded components. Computers are known to crash, even desktop Apples. What makes you think your car's computer is infaillible ?
And, it would be reasonnable to assume that a 97K miles car is not brand new anymore and that noises and light changes in car behaviour are possible due to general wear and tear.
Personnaly, I would think that Dave is right, because it is such common sense.
Burt, from France.

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