Mechanics

4X4 - ROUGH IDLE

1995 Ford Explorer • 170,000 miles

I have a 1995 Ford Explorer 4X4 Eddie Bauer Edition. It is idling around 550-600 RPM's in Park and Neutral and 475-500 RPM's in Reverse or Drive and causing the truck to shake. I thought it may have been bad gas but I have ran it down to a quarter tank and filled with Chevron gas and fuel treatment since then and it is still doing the same thing. In the morning when I first start the vehicle it will run smooth until it warms up or if I change the gear.

Here is what I have done so far.
*Checked Vehicle Fluids
*Checked for Vacuum Leaks
*Changed the Fuel Filter
*Changed the PCV Valve (It was no good)
*Changed the Idle Air Control Valve
*Cleaned the Throttle Body
*Cleaned the MAF Sensor
*Oil Change Performed (2 months ago)
*Spark Plugs Replace (4 months ago)(Did not change wires)

Thanks! I hope I gave enough information that someone can help!
Avatar
Justin Adair
February 21, 2012.



Maybe wires would be next? Especially if original?

Tiny
Fixitmr
Feb 21, 2012.
I have no clue. I might try changing the Plugs and wires both this time. See when I got the vehicle last year. It had a rough idle and drove really rough as well. I changed the spark plugs and that seemed to have fixed the issue last time. Every other plug was bad and was black on the bottom and some appeared to have oil on them. But this time it seems different. Needless to say it was not well maintained. I have also replaced the Radiator, front rotors and brakes on this vehicle because they were bad as well.

Tiny
Justin Adair
Feb 21, 2012.
Okay I had a diagnostic ran on the truck. It said there was a random misfire on Cylinder 6 or something like that. This vehicle has a 4.0L E.F.I.

Tiny
Justin Adair
Feb 21, 2012.
So you gonna try wires and plugs?

Tiny
Fixitmr
Feb 21, 2012.
Yeah it seems like a logical thing to do considering if you reach and try to push on one of the plugs while its running it shocks you. Maybe a new coil pack is a good idea as well. If all else fails a new MAF and Intake Gasket will be next because the EGR valve appears to be working correctly.

Tiny
Justin Adair
Feb 21, 2012.