Cruise Control Problem
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Joined: Aug 2004
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From: Georgia
Cruise Control Problem
The cruise control in my 2004 F150 with the 5.4 has become erratic lately and before I take it to the dealer, I just wanted to check and see if anyone has had this problem fixed. When going down a slight downgrade, the cruise will start surging pretty badly. Feels like you're pushing down on the pedal and then letting off repeatedly. When going down a steeper hill, the truck will sometimes slow down 5 or 6 mph below the setpoint and then the cruise will punch it at the bottom of the hill to speed back up.
Anyone seen this one?
Anyone seen this one?
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Joined: Oct 2006
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From: Blountstown, Fl
Originally Posted by GT79
The cruise control in my 2004 F150 with the 5.4 has become erratic lately and before I take it to the dealer, I just wanted to check and see if anyone has had this problem fixed. When going down a slight downgrade, the cruise will start surging pretty badly. Feels like you're pushing down on the pedal and then letting off repeatedly. When going down a steeper hill, the truck will sometimes slow down 5 or 6 mph below the setpoint and then the cruise will punch it at the bottom of the hill to speed back up.
Anyone seen this one?
Anyone seen this one?
Mine does that occasionally...only after I installed my Edge. I figured it had something to do with the responsiveness that the edge added. I like it. It usually takes only 2-4 mph depending on the strain of the engine to downshift
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Joined: Oct 2006
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Originally Posted by GT79
The cruise control in my 2004 F150 with the 5.4 has become erratic lately and before I take it to the dealer, I just wanted to check and see if anyone has had this problem fixed. When going down a slight downgrade, the cruise will start surging pretty badly. Feels like you're pushing down on the pedal and then letting off repeatedly. When going down a steeper hill, the truck will sometimes slow down 5 or 6 mph below the setpoint and then the cruise will punch it at the bottom of the hill to speed back up.
Anyone seen this one?
Anyone seen this one?
Senior Member
Joined: Sep 2006
Posts: 792
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From: West Virginia
i have the same problem... my cruise went completely out a few weeks ago and it was do to a faulty TSB switch. I hope'd after the new switch it'd fix the problem but no luck... keep us posted!!
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From: Georgia
I think I fixed this one myself. The dealer couldn't replicate the problem (no way they drove it with cruise on down a hill!) and just reflashed the computer. Of course, this did nothing 
.
The problem turned out to be a dirty (sticky) throttle body. When going down a hill, the CC would try to give it a little throttle and the throttle plate would stick shut. It would throw in a little more power to the stepper motor and the plate would come unstuck and overshoot with too much throttle. I cleaned the throttle body with a coating safe cleaner and no more problem! I only live about 3 miles from work so the engine hardly gets to temp before its shut down. That probably has a lot to do with the excessive soot in the throttle body. My '97 F150 had a sticky throttle plate once and that's what made me think of it. Hope this helps.
.The problem turned out to be a dirty (sticky) throttle body. When going down a hill, the CC would try to give it a little throttle and the throttle plate would stick shut. It would throw in a little more power to the stepper motor and the plate would come unstuck and overshoot with too much throttle. I cleaned the throttle body with a coating safe cleaner and no more problem! I only live about 3 miles from work so the engine hardly gets to temp before its shut down. That probably has a lot to do with the excessive soot in the throttle body. My '97 F150 had a sticky throttle plate once and that's what made me think of it. Hope this helps.