I have a 1998 Accord lx 2.3L. The engine shakes when idling and accelerates hardly. It has been at the mechanic shop for a week now and they say that it's misfiring. They've changed all of the spark plugs & wires, distributor cap and assembly, map sensor, and an ignition coil. Also, I have checked the compression and it read 150 psi, and the timing is correct. It still runs the same and they can't figure out the reason. Can you help please?

 

Is missing on one cylinder or all cylinders? This should be indicated by P030N codes where N is 1-4. P0300 indicates random misfire.

Since nearly everything on ignition system has been replaced, fuel delivery seems more likely; faulty injector perhaps, but this would appear as miss on one cylinder. Four faulty injectors is unlikely.

good luck

 

I don't know the codes, I'll check and tell you.
Regarding the fuel system, I don't think so for a reason. When you drive the car on the highway or above 3000 rpm, it drives smooth as if nothing's wrong with it.

 

It turned out that there are 2 timing belts and one of them was cut. Problem solved. Thank you.