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Erratic idle

959 Views 8 Replies 4 Participants Last post by  bozodog, 
harvey4804
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?
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B
i had the same problem found out the injector pump was jumping into full fuel at low rpms . i had to change the inj. pump
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