Rough idle at start and rough while driving - Ford Powerstroke Diesel Forum
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Old 07-15-2014, 08:28 AM
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Rough idle at start and rough while driving

This problem just started. When I started my truck this morning I have a very rough idle and I can hear the engine making a loud "cha cha cha cha" sound (not singing sweetly to me tho). It's my daily driver and I had to go to work so I was hoping driving it would kind of work thru the problem but it didn't, as I was going down the freeway and hit about 52mph and about 1500RPM the truck shook like hell. So I hit the gas some and it smoothed out but I could still hear it. I don't know much about diesel and I'm learning as I go. If it was a gas engine I'd say I've got a miss and say it's the plug/wires but I know this doesn't have anything like that and I'm hoping it's not an injector. Would an exhaust leak or vacuum leak make it that rough or would an injector be a likely culprit? I had the FICM rebuilt at FICMrepair.com and did the 2 year warranty before they offered the lifetime. Either way any help or ideas would be appreciated.
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Old 07-15-2014, 08:36 AM
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Have you hooked it up to a data monitor? A lot of symptoms can look like a lot of things; without values, it is hard to help.

Get a scanner on there, read FICM power, ICP, IPR, etc. Do an injector buzz/contribution test and the like. Once you do that, we can take the results and determine a better plan of action.
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Old 07-19-2014, 10:02 AM
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Took it to a buddy at a Ford store, said #2 injector was gone. Had a feeling but I can't be without my truck so I'm having him replace it.
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Old 07-22-2014, 12:50 PM
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Quote:
Originally Posted by Eevulone View Post
Took it to a buddy at a Ford store, said #2 injector was gone. Had a feeling but I can't be without my truck so I'm having him replace it.
It is highly recommended to replace all 4 injectors on one side if one goes; all 8 if possible.
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