A friend at work had his battery replaced last month. Afterwards he's noticed that the idle jumps around when cold.
I think it sounds like the iac valve. Just seems funny that it happened after the battery change.
Yes he had the cables off long enough to erease the computer settings. I think it should have relearned after a few miles.
Considering a cleaning of the iac. The dealer told him his 01 5.4L could have 2 possible different iac valves.
I can't find any reference to 2 types.
Should he clean it first or just change it?
thanks, bullseye670...................

 

try cleaning it first.look around make sure you dont have small vacumn leak somewhere.

 

check the boot behind the throttle body that comes off the line from the pcv. its known to crack.

 

You're dealer is right, there may even be a few more different ones, but he's most likely thinking of E-150, 250 van engines and/or F-250,350 Super duty truck engines. Regular F-150 5.4L engines came with the t-body facing you, the other engines for MOST, not all vans curved toward the driver side headlight. Those ones had a different IAC too. I myself would clean it first, along with the t-body and elbow it bolts too, use a toothbrush if possible and wipe dry, if possible. You should see an incredible difference, but that is delaying the enevidable of buying a new one, it buys maybe another year or two.

 

I think we'll put his (expedition) in my garage tomarrow and check things out. I figured an expedition would be identical to a f150.
Thanks for the replies, guys!
(With any luck we'll be taking it ice fishing by the weekend)
bullseye670.................

 

You are correct, the 5.4L's are to my knowledge identical in every way for 01, except for code stickers on the cam covers and front cover.