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Old 04-25-2016
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I am: Clay Jones
Join Date: Nov 2015
Location: rocksprings
Vehicle: 2002 Ford Ranger
Drive Type: 4x2
Engine: 3.0
Posts: 77
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Annoying Vibrating when idling

Ok so ive been driving for a short period of time at varying speeds and i pull up to a redlight and slow to a stop. While i sit there my truck shakes slightly, its more like tremors ever 2 seconds. they seem to come from the engine. What is this and how do i get it to idle better.
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Old 04-25-2016
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I am: Ron Dean
Join Date: Jan 2014
Location: Vancouver, BC
Vehicle: 1994 Ford Ranger
Drive Type: 4x4
Engine: 4.0
Posts: 4,756
Total Props: 88
Your engine is misfiring.

Stop by an auto parts store and get them to read the codes, for free, WRITE THEM DOWN.
DO NOT buy anything at this time, no matter what parts guy says, lol.

Computer should have a record of misfires, this will tell you if it is one or two specific cylinders or if it is a random misfire, this will give you a direction of possible causes.

P0300 = random

P0301 = #1 misfire
P0306 = #6 misfire
These are specific

Could be as simple as adding a can of Seafoam to gas tank to clean dirty fuel injector tips, I do this once a year, dirty tips don't spray fuel at idle, they drip, so fuel mix doesn't ignite every time.
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