My 93 f150 4.9 has run perfect for years. Then, started to stall and jerk. My mechanic replaced the Idle air Control Valve and ran perfectly for about 30 miles,then back to the same. What else should
My 93 f150 4.9 has run perfect for years. Then, started to stall and jerk. My mechanic replaced the Idle air Control Valve and ran perfectly for about 30 miles,then back to the same. What else should we try?