I’m a first time Honda owner; I bought a ’94 Honda Accord Sadden 4 cylinder from an old lady original owner, the car has 75000 miles when I first got the car it started right up , I changed the oil and give it a tune up ;spark plug wires ,plugs, air filter also comp test and vacuum leaks check . But I notice that the engine sure shakes a lot, it shakes in neutral and more in drive. Is there something that I’m missing to make the engine run smoother or is that normal. Can it be the motor mount?
Im posting from work so I don’t have any specs to post, just want a general idea of what to check

 

Well, it COULD be the engine mounts. When the eninge's not hot, you can grab the valve-cover & shake it. Shouldn't be any excessive movement & certainly no clanking or knocking.

What kind of spark plugs? Honda seems to like NGK the best, some people have had misfire problems with Bosch.

What's the idle RPM? Maybe setting the BASE idle properly is the next thing to do.

 

thanks jim, the spark plugs are NGK, and ill check to see if i can shake engine , on the idle what should it be ? i think mine is at about 1000, ill be getting a manual real soon

 

BASE idle isn't the same as the normal operating idle.

First, take care of a few things...
Fix all vacuum leaks.
Make sure there's NO air in the cooling system.
Clean throttle body.
Throttle cable must go slack.
Throttle plate must close against throttle bore.
(mechanical stop-screw only just prevents it from wedging stuck closed)

Find the stuff in this picture...
Idle-air screw is #1 recessed in a hole
IACV is #19 bolted to the intake manifold


1) Get engine all warmed up. ALL loads (A/C & electric) turned OFF.

2) Disconnect wiring plug from IACV. This should make it almost stall. Adjust the idle-air screw for idle at 550 rpm (this is the BASE idle). If the radiator fan comes on, use the throttle to keep it running. Wait for it to turn off then continue adjusting.

3) Turn off the engine. Plug the IACV back in. Reset the ECU.

4) Start the engine without touching the gas pedal.

5) Let it warm up completely without touching the gas pedal.