06 f150 5.4l rough idle

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10-13-2015, 08:42 AM

#11

red05f15

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Quote:

Originally Posted by lewissa81

If you smell gas, then check the plugs to make sure they're torqued properly.
Mpg's will always drop at idle.

This may sound stupid but how do I check that?

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10-13-2015, 09:24 AM

#12

lewissa81

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With a torque wrench. When you replaced the spark plugs, did you use a torque wrench to tighten them? I think the recommended torque is 25 ft/lbs on this engine.

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10-13-2015, 10:17 AM

#13

red05f15

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Quote:

Originally Posted by lewissa81

With a torque wrench. When you replaced the spark plugs, did you use a torque wrench to tighten them? I think the recommended torque is 25 ft/lbs on this engine.

I just used a socket to tighten them so I have no clue the ft/lbs of tq

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