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4.6 rough idle

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Old 08-20-2015, 09:55 PM
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Removed the PVC valve looks OK the ball is moving freely
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Old 08-21-2015, 09:02 PM
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Hello I just put in new pvc valve , fuel filter, removed and cleaned throttle body and maf sensor...... Truck still runs the same still has a rough idle. Throttle body was really dirty maf sensor was clean
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Old 08-22-2015, 01:48 AM
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What brand of plugs did you use? Boots usually include springs. Did they?
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Old 08-22-2015, 01:49 AM
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Also may be a vacuum leak
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Old 08-22-2015, 06:25 AM
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I used autolite I think they was like 5 bucks a plug and yes new springs to.



It was doing this before the tuneup
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Old 08-22-2015, 09:14 AM
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Are your cats clogged?
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Old 08-23-2015, 02:44 PM
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Hope you find the problem soon but by the time you do, your truck will be running awesome with all that you're doing to it.
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Old 08-23-2015, 05:33 PM
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How do I check that
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Old 08-23-2015, 07:38 PM
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Unhook the exhaust between the manifold and cats, if it runs better (will be loud as heck when you test drive it) then 1 or both of your cats are clogged.
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