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1983 - 2012 Ranger & B-Series All Ford Ranger and Mazda B-Series models

rough idle on 06

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Old Jan 13, 2010 | 08:46 PM
  #1  
35l911's Avatar
35l911
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From: oxon hill, MD U.S.A
rough idle on 06

this started today 01/13/2010 at 4:30pm est

truck 2006 ford ranger sport super-cab
drive train automatic 4x2
engine v6 3L

problem: The engine started running rough while sitting at the stop light, continued to run rough every time i came to a stop. while driving the engine seemed to miss every once and a while. there are no code stopped at auto zone and had them run the computer for codes. while backing out of the parking space the truck stalled but fired back up still no code. when i got home i popped the hood and looked for a while (time now 8pm est) saw nothing until i bumped the intake hose and the truck stalled when i did that, restarted the truck and moved the intake hose it stalled again. the air filter is new the box is clean(no leaves or nests). what could be causing this issue I hope not a CAT because my truck has 3 of them
 
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Old Jan 13, 2010 | 09:01 PM
  #2  
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njneer1
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From: Southwest VA
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Don't know much about those V6's ....but If it has a mass airflow sensor .....tht would be my guess......or a wire you are bumping when you do that
 
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Old Jan 14, 2010 | 03:59 AM
  #3  
03 Maz B23's Avatar
03 Maz B23
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Try cleaning MAP sensor, look for any loose vac lines and add a bottle of dry gas to tank
 
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Old Jan 14, 2010 | 04:26 PM
  #4  
35l911's Avatar
35l911
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From: oxon hill, MD U.S.A
I saw a spark jump from the 2 wire to the exhaust manifold through a 1 inch gap of air. (about 5:30am est) that was causing the rough idle as soon as i changed the wire the idle was normal. when examining the wire at the top of the spark plug cap there was a little burn mark.

bad spark plug wires can cause strange symptoms
 
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