Cummins Diesel Forum banner

Erratic idle

960 Views 8 Replies 4 Participants Last post by  bozodog
Sometimes, not always, when my truck is idling wether its 10* or 100* outside the rpms jump 100rpm to 120rpm for a second then return to normal. this was happening before I did my mods (listed below) and after. If I'm at a light and I don't have a good amount of pressure on the pedal it'll jump forward. Any ideas?
1 - 1 of 9 Posts
Oh No!

Holy CRAP!
You need to get 6 new NGK spark plugs in a hurry before you wash a cylinder because of it not fireing.

Autozone carries them. Get the 13/16 plugs though....not the 5/8:)
1 - 1 of 9 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.