Stalls at Idle

[ridinsurf66]

I just recently had the spark plugs changed on my 1999 Ranger 2.5L I4. A few days later the check engine light came on and now it will stall at idle. It runs fine at 70 mph on the freeway. MAF or O2 sensors perhaps? Could anyone guide in the right direction?

 

[Primer88]

Clean the IAC and get that code checked.

 

[snake]

I agree. Also look for a vacuum leak. What kind of plugs did they use? If champions or bosch or some other trash they may be the culprit too- always use motorcraft or autolite...