Rough idle only w/P0174

[Dolphin_S4]

2004 S4 90k mi. Only running rough at idle. No issues whatsoever with power. P0174 code thrown only. When sitting in park I can feel the car start to miss or rough idle but if I tap the gas to raise the RPMs just slightly it corrects itself for awhile but eventually it will fall back into what feels like a cam lope. Had it looked at by a nearby shop and they said they thought it was a battery issue.... I've cleaned the MAF(correctly), checked for vacuum leaks(none), and even replaced a couple of suspect vacuum lines. Any information whatsoever is appreciated, thank you!

[mikeA602]

try the pressure control valve...i had the same symptoms and it corrected it


Sent from my iPhone using Audizine mobile app

[Dolphin_S4]

Will do Mike! Thanks


Sent from my iPhone using Audizine mobile app

[spiki]

I had the same issue mine was a bad battery, no codes just ran sluggishly. RnR battery and add a can of sea foam to tank. It fix sluggishness


Sent from my VS990 using Audizine mobile app

[MrVern306]

did u ever get this issue resolve ?