1996 Ford Explorer Rough Idle

Asked by Sep 13, 2016 at 11:38 AM about the 1996 Ford Explorer 4 Dr XLT 4WD SUV

Question type: Maintenance & Repair

Hello, I need some help with a 1996 Ford Explorer.  The truck drives great
on a cold start and continues to run good as long as it isn't shut off.  But, if
the vehicle is driven and shutoff, it runs rough after restarting.  It only
happens after it has been sitting for about twenty minutes after being shut
off when fully warmed up.  I've recently replaced the plugs and wires,
cleaned the MAF sensor and tested the ERG valve.  The engine code
shows a misfire on cylinder 6. Any help would be greatly appreciated.

2 Answers

109,445

Does it smooth out after a few seconds of running? if so I would check the fuel pressure, it might be on the low side, if so check the regulator and then the fuel pumps deadhead pressure, if any of those fail replace them along with the fuel filter and pump relay, then check the fuel lines for proper routing, they maybe too close to a heat source and cause some fuel vaporization during hot soak, some more shielding might be required as this rig was manufactured before this trash we now have for fuel was made. Then finally run some SeaFoam in the fuel tnk to help clean out all the curd buildup on the injectors. You may have to replace the fuel filter afterwards.

Thanks for you reply. The vehicle doesn't smooth out right away but does occasionally after driving a while. But after sitting a few hours, the vehicle runs perfect until I shut it off and restart again. I will check the fuel pressure and respond back. Thanks again.

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