Motor vibrates bad but engine not missing - 1996 Geo Tracker 2 Door

IF That is true, then the engine mounts are bad
but all G16s shake, all 4 cyl, do.. by Design.
(only exceptions are Mitsubishi with the Silent shaft counter shaft)
i bet it is misfire.
most do , not serviced right.

No it's not. Usually a moderate vibration in park or neutral is a bad motor mount or transmission mount.

Get a friend to open the hood and look at the engine go up or down in the engine compartment when the brakes are firmly applied and switching between reverse and drive. Look for the motor mounts for behavior where tears exist in the rubber.

Vibration at idle brings to mind a few suspects:

transmission mount(s) broken/missing
transmission internally worn
motor mount(s) broken/missing

(1) transmission internally worn or transmission mount broken/missing - test this by shifting into neutral at the next stop light. If the vibration disappears when you disengage the transmission, then the transmission is the source of the vibration. You'll have to inspect the transmission mounts - if they're ok, then the transmission is internally worn and can no longer smoothly "slip" while idling in drive.
(2) motor mount broken/missing - also test this by shifting into neutral at the next stop light. If the vibration persists, then the transmission is exonerated, and the vibration is coming from (under) the engine. The rubber part of motor mounts commonly crack/break and or pop out and are lost.

A photo of the front motor mount for the 2003 Dodge Neon:

is the check engine flashing when its vibrating? if you its an indication you have a engine miss . the danger of running the car too long with a engine miss is it could brake your catilic converter. that gets pricey. if you have done a tune up in the last 100k that includes new spark plugs and wires please do so now. before you cause any damage.

If your motor is suffering from lack of power you might have an engine miss, if the engine performs OK then you have a bad or some bad motor and transmision mounts. The mounts are are made of rubber and designed to absorb motor and transmision vibrations.

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The vibration may not be the mounts but the motor missing. What the motor with the hood open. Have your driver put the unit in gear and see how much things move touch the engine and feel the unit does the engine run smothly or does it need a tune up or vacume leak fixed. The exhaust system may be touching the car somewhere and it's transferring noise and vibration. Air conditioning lines and fuel lines can do it too. Is the check engine light on? Mixture problems can make the engine chuggle and vibrate more than normal. oxagen sensers can cause mixture ans can temperture senser lies. Even an opened too much therostate can make the system think that its cold and turn up the fuel till the motor shakes. fouling plugs and causing fuel ecomony problems and low performance problems.

Hi,

vibrations over 55 mph are usually balance related (tire balance, drive shaft balance, motors)

vibrations at lower speeds are usually mechanical (bent rims, out of round tires, bad tie rods)
Therefore the suggestion for checking the harmonic balancer is perfect in your case.

Thanks

no should be same engine. check your engine mounts and tranny mount. how bad a vibration? sometimes after installing engine the trans gets shifted around and if mount was worn it will allow it to hit crossmeber and vibrate.

Hi! Your wheels need balancing or your steering ends are bad.