Spark plug Gap? Poor idle? 2003 4.0 Need HELP!
My manual says something like .052-.056 spark plug gap, and the sticker under the hood says .062 - .065. It is currently gapped at the 0.65 area. After i had changed plugs and wire to try and solve a poor idle issue. Well that didnt help the idle so tonight i replaced the coil pack and it continues to idle rough. I did notice while in park in idles pretty good, but when i turn the lights on it gets worse an with the brights on even worse. Which makes me to think my plugs are losing spark performance with other things running. Also when in drive coming to a stop at a light the idle also run poorly.
Also changed the MAF, IAC Valve, and PCV valve to help fix the issue
- Would re gapping the plugs down a bit help?
- any other ideas?