[flash gordon]

I have changed the plugs, wires, DIS, idle air control, o2 sensor. If the EGR is out doesn't throw a code? I was thinking about the MAF, cat, exhaust leaks or the MAP sensor?

anyone have any ideas?

[b_chandler]

What kind of idle problems?

[flash gordon]

when the idle is at normal rpm's 750-800 it shakes a little. it gets worse when its in gear. when I step on the gas it goes away?

[Green Ghost]

it is the egr, and or the o2 sensor

[sleeper_inc]

Put a timing light on ever spark plug wire.

When I did my 2.3 turbo swap my engine did the same thing, here it was missing sometimes because of a bad connection and a bad PIP and TFI

[giamanut]

if the EGR or O2 sensor is bad you would probably get a check engine light and neither have much to do with idle.
the coils deteriorate in the spark plug wire holes make sure they are all good just pull them out one at a time and look. Or run it at night and look for blue sparks at the coils.
always pull your plugs they should be dry and light brown.
Also plug wires break at he plug check this.
Check the TPS there are three wires turn the key to run leave the plug on the TPS check voltage at each wire they should read Ground / 5v AND .9 to 1v obviously you need a volt ohm meter to do this. if this is out you need to loosen the torques on the tps and rotate until you have .9 to 1 v the 5v should be constant as well as the ground.
If this fail you may have a bad plug wire they can look good but still be bad.