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Old 06-12-2012, 04:57 PM
billc07ranger billc07ranger is offline
Learning to use the forums
 
Join Date: Jun 2012
Posts: 5
Default 07 rough idle I'm stuck!

Hello, this is my first time using a forum, Im stuck. I have a 07 ranger with a 3.0, the truck has a rough idle, and almost looks like its misfiring. However, there is no engine light or trouble codes that come up. I have done all the maintenance (oil, air filter, throttle body cleaned,ect...) I changed the spark plugs and the plug wires, and saw no improvement. I hooked up my fuel pressure gauge and it read 65PSI which is normal I believe. My next idea was to change the PCV valve, the manual recommends replacing it at 100k, could this cause my rough idle? Also, I was thinking maybe the rough idle is because of the idle air control valve. But wouldn't this cause an engine light? Please help I can't keep throwing parts at the truck. Any advice would help. Thank you!!

P.S. While the truck was under Ford's warranty the dealer changed the coils, fuel injectors, and re-flashed the ECM. (all of those problems happened many miles ago and they all produced an engine code)
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2007 Ranger XLT 2X4 3.0 V6
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