I have a 91 Crx hf switched to si with a jdm d15b vtec and when the tach drops from 2000 rpm to 1000 rpm it shakes pretty bad the steering wheel shakes and even the change in the ash tray shakes and it keeps shaking when its on idle at 1000 rpm how can i fix this?

 

You might want to check that the reading you're getting is accurate. You might be below 700 when you think you're at 1000 or so. Just an idea.

 

Do they usually shake when they go under 1000 when i put it to 1200 or 1250 its fine i just bought a brand new cluster so it should be ok

 

Check your engine mounts. What mods do you have on it?

 

I have a cai and a chikara header and i put those urethaine bushings in the mounts

 

I heard the use of them motor mounts inserts, that you will feel more engine vibration at idle and driving.. but they do their job nicely.

 

I think they work very well i just dont like the vibration

 

it shakes very little when i turn off the heater but when the heater and the rear defrost is on it shakes like crazy why?

 

When was the last time the plug's and wires were changed? Are the plug wires good and seated, both on the head and dist. What color/condition are tha plugs...

Also, I have ran across info stating that mounts must be installed in a certain way/order or something like that. Or vibrations might occur....

The heater's are adding more load to the engine when they are turned on, because of the alternator needing to create more jucie to run them.


[Modified by 88_SC_CRX_Si, 11:35 AM 1/6/2003]

 

the plug wires are brand new msd and the plugs are brand new ngk and everything seated on tight