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Old 07-26-2012, 02:55 PM
Shakedown Shakedown is offline
Gimme your money
Join Date: May 2012
Posts: 147
Default Re: I need help!!!! Rough idle 4.0 v6

Originally Posted by greenmachine2000 View Post
throw a can of seafoam in er'.
Maybe try this too? You can put it in the Brake booster line.
2004 FX4 4.0L SOHC 5 speed manual. Mod list: Throttle cable, blinker, headlight, torsion bar (1.5"), intake mod, Pioneer DEH 9400, RF 10" shallow punch DVC 300 watt rms, retrofit bixenon projectors, red painted calipers and drums, red painted tow hooks, bull bar, 2" shackle lift.
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Old 07-27-2012, 03:56 PM
DarkEdge02 DarkEdge02 is offline
Ford Tough
Join Date: Jul 2012
Posts: 417

IT'S ALIVE.... IT'S ALIVE!!!!!! Muahahaha!!! Replaced coil pack. Did not bother testing as I already had the new one in my hand. Sure enough a .75" crack in plastic side. Replaced. Started. RUNS AS STRONG AS EVER!!!!!!

I highly recommend replacing your coil pack. The smallest crack makes all sorts of problems.
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4.0, 4x4, idling, rough idle

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