I have a 1998 F150 and it tends to stick in high idle. Had it checked at Auto Zone and came up with error #1506. Now they told me it could be several things wrong. Anyone have any ideas? Any help would be great! Not a top notch mechanic.

 

Idler Air Control maybe (IAC). Ive seen it mentioned alot and have changed mine recently. Real easy fix. takes about 5 minutes to take out and replace. Most time consuming thing is buying it. Cost about 45 bucks at auto zone. My truck stuck at about 2000 rpm's when i was going about 60 and i changed about 5 things before it finally fixed. (IAC, TPS, O2 sensors, Cleaned the throttle body, and finally cleaned whole plenum, including EGR ports.) runs like a champ now. I also read up on Seafoam and used a can of that but since i had already cleaned all the carbon out, i didnt get the full effect of it. Good luck and keep us updated.

 

Going to give the I A C a try today. Also picked up Some Seafoam and will give that a try also. Will keep you posted.

 

Changing the IAC seems to have taken care of the problem. No trouble after replacing it. Also put in a can of Seafoam. Truck seems to run a great deal smoother all the way around. Thanks for the help.