5.8L question

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Sep 17, 2010 | 09:09 AM

f150forever

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Freshman User

Joined: Aug 2010

Posts: 25

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5.8L question

I have searched the forums with no luck. I have always been curious why my 95 with the 5.8L idles rougher than my 96 with the 5.0L. It is almost like the 5.8L has a skip at idle causing it to vibrate and idle rougher but off idle it is smooth and runs great. I always thought this was a problem with just my truck but I noticed all of my friends trucks do the same thing. I have not been able to verify this or find any explanation for this other than someone told me it was due to valve overlap. Does anyone else know anything about this?

Sep 17, 2010 | 09:39 AM

96ford250

Elder User

Joined: May 2010

Posts: 970

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From: Northeast Ohio

what rpm is ur motor idling at? if its like 900 to 1000 its probly a vacuum leak i jus went through the task of pulling all the plastic lines and replacing them with rubber lines.