03 Explorer Rough Idle?

[bjtheman1]

I've got an 03 EX Eddie Bauer V6 4.0L with 119,000 miles on it

What I've done so far:
New spark plugs & wires
Seafoam through intake
Fuel injection cleaner in gas tank
New fuel filter


Now, my rough idle. From what I've done above that could help it, well it hasn't the rough idle remains. I also checked for any codes and nothing! I've replaced the air filter, cleaned the MAF & Throttle Body as well. I checked the PCV connection that many had crack but mine was ok. Any other thoughts or ideas?

[mstng86]

Try a new tps sensor.

[shumpertdavid]

Tps unlikely, however if the maf was really dirty the baro reading would have been way off. Pulling a battery cable for 10 minutes will reset that. Intake gaskets are also a common failure with high miles, spray CARB cleaner along the lower plenum and lower intake with it idling. If the idle smooths or it causes it to die the gaskets are sucking air. Those engines are plagued with timing chain issues also.

[JC316]

Tps unlikely, however if the maf was really dirty the baro reading would have been way off. Pulling a battery cable for 10 minutes will reset that. Intake gaskets are also a common failure with high miles, spray Feb cleaner along the lower plenum and lower intake with it idling. If the idle smooths or it causes it to die the gaskets are sucking air. Those engines are plagued with timing chain issues also.

This. The older intakes had a bad habit about cracking too, so watch for that.

[01svtboy]

don't throw parts at it.. any codes?

[bjtheman1]

don't throw parts at it.. any codes?

No codes, checked DTC, ABS, & Trans. Nothing, runs fairly well just a rough idle.

[01svtboy]

check pcv hoses, make sure non are super soft or collapsed.