91 rough idle, won't rev | Page 2 | Ford Explorer - Ford Ranger Forums - Serious Explorations

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91 rough idle, won't rev

damarble

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01 Sport Trac 5.0L manual
Got it solved. Turned out to be a cracked plug. All good now!
 
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damarble

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City, State
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01 Sport Trac 5.0L manual
Or so I thought. It's back with a vengeance. Now restarting doesn't always fix it. It bogs down if given more than 1/4 throttle and starts bucking really bad. I'll be digging into it here soon.
 
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damarble

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Messages
739
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City, State
Washington
Year, Model & Trim Level
01 Sport Trac 5.0L manual
I unplugged the MAF and it felt like I gained 50hp! Unfortunately the idle was horrible and it got about 8mpg. Threw a used MAF off a junker on it and all is well.

The bottom half of my airbox is warped and the filter doesn't seat correctly, I think dirty air is getting past and killing the MAF. I'll be picking up a new box at the yard soon.
 
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