[shorod]

Welcome to the forum!

Is your 3.0l V-6 the 12V (Vulcan), 24V (Duratech) or 24V (SHO)? If the Duratech or SHO, you will want to make sure the vacuum secondaries are closing properly.

When I come across a hunting idle issue, the first thing I suggest is to use a bottle of fuel injector cleaner with the fuel. That's solved the issue many times. Also try turning on the A/C. If the idle speed changes, your IAC is probably working fine.

Do you have a K&N or other oiled air filter? If so, you may have a contaminated Mass Air Flow (MAF) sensor contributing to the idle issue. The MAF can be cleaned if you have a very steady hand, some electrical parts cleaner, and a chamois tipped swab.

-Rod