Hey all,

I have a 1997 F150 4x4 with 72,000 or so on the clock..

Every so often under low speed deceleration (like pulling to a stop sign) my engine (4.6 Ltr) just stalls. No sputter, no cough, no nadda, it just stops. I'm currently getting quotes to get the Plugs and the fuel filter changed out. Does anyone have any other things I can/should check? (Air filter is in pretty good shape)

Thoughts?

-Peter

 

Could be a dirty IAC valve. Easy to remove and clean with carb. cleaner.

 

Yep. IAC. But use throttle body cleaner labeled as rated safe for oxygen sensors.

 

Sounds just like an IAC. I'd make sure and get that fuel filter changed, too, though. Without a misfire, you could push the plugs and wires back a bit with those few miles on it.
Let us know what you do and if it fixes it!

 

Were is IAC located on a 99 5.4.
thanks

 

Here is the IAC valve on a 1999 Ford F150 5.4L engine. It is bolted to the Intake Plenum with two bolts.

Click for larger image...



http://66.179.14.118/forums/showthre...ht=iac+picture

http://www.stretcher.com/stories/00/000221i.cfm

 

temp1 thanks,can't get no clearer than that.I will post if that works.
Thanks Again
Joe

 

hi i have a 1997 f150 4x4 4.6 supercab with 158k with the same problem as his i have cleaned the iac and changed the fuel filter but it still stalls the truck idles fine and it doesn't do it all the time also i'll stop at a few stop signs and all of a sudden it stalls i'll start it again and it idle's fine then might not happen for a couple of days would iac shot or is it something else please help

 

Sometimes cleaning it just won't do, and it has to be replaced.