and no. it idles the same if its in park drive nuetral or reverse..... sometime the idle picks up a bit and isnt rough at all.... but lot alot. the rough has been more and more today. not in extremety... the same vibration just more regardless of hot or cold....

 

well if the chain was loose it could have jumped a tooth and it would idle horribly and would cut back

 

this problem just started.... the honeycomb in the cat shattered.... took it out.... 02 sensor went out. changed it... now has rought idle....

 

i thought that timing would be worse if was loose...

 

does it seem to feel like it jumps when u are stopped at a light?

 

i'd start with the cheap parts first then work your way up.

 

yes. if i barely hold the brake it lerches.....

 

replaced wires plugs dist. cap O2 sensor oil and filter cleaned the IAC and the throttle body....

 

also checked and fixed and broken vac. lines....

 

have you reset your PCM ?