I have 10,500 miles on mine and it idles rough and after allowing it to warm up, it will stumble almost to the point of dying when initially shifted into either Drive or Reverse. I tried different gas, disconnected the battery to reset the computer, kicked the damn thing and it still does it. Kind of embarassing. Feels like a $2,500 truck not a $32,000 one.

------------------
2000 Extended Cab F-150
4X4 Offroad
Flairside Oxford White
AirRaid FIPK
2001 L Tails
2001 L 3rd Brake Light
2001 L Corners
Pioneer DEH8000
12 Disc Changer
Custom Amp Rack
Rockford Fosgate Punch 160
Rockford Fosgate 10" SUB
Keypad Mod
Polar Bear Brushguard
2 160 Watt K.C.'s, Duraliner Bed Liner
AVS hood deflector
AVS Vent Visors

 

Poor idle for day one. Seems overly sensitive to gas brands, weather, etc. Sometime OK, usually not. Gets worse in low humidity conditions.

History: replace crankshaft position sensor, #4 coil.

My '88 Honda Accord with 4cyl carb engine was smooth as glass in comparison.

------------------
'99 f150 S/C 5.4L
Tow package, L/S, 3.55

 

Check out the messages in the service engine soon topic!!!!!

 

35,000 4.6 97 and no problem with any rough idle.

------------------
1997 F-150 XLT 4.6 REGULAR CAB, FLARESIDE PACIFIC CLEARCOAT GREEN 5-SPEED. WESTIN NERF BARS, POWER EVERYTHING,BUG SHIELD, EX-TANG SOFT COVER, BED LINER(FORD).

Better 1/2 : 92 Red T-Bird.

 

2001 SCrew with 5.4. No rough idle.

Have you tried a high quality injector cleaner? Not sure how many miles you have on your truck, but some funky gas might be affecting the injector port area.

------------------
2001 F-150 SuperCrew, Lariat 4x2, Black w/gray leather, 5.4L Engine, Towing package (1.02" radiator)

Modifications: Gibson SideSwept Exhaust, K&N filtercharger w/modified cold air box, ******* lid, Bed Extender, Ventvisors, Hood deflector, Black Stull Billet Grille, Lightning Tails

Shopping List: Oil filter relocation, Front & Rear Swaybars, PermaCool Cool Pack II dual electric fans (available this summer)

 

98 4.6 56327miles engine runs fine, sorry to hear about the problems, hope Ford fixes it right!

------------------
98 F150 XLT Super cab s/b
Two-Tone paint: Moonlight Blue w/Light Prairie Tan Accent
4.6L Auto 4X2
3.55ls 255/70r16
Premium sound w/6Disc changer
Captains chairs

 

97 s/c 4.6
bought used,has 56,000 and rough idle.

------------------

 

My son has a 99 dakota ext cab with the 3.9 v6 and it will keep jiffy pop from burning on the burner when it is idling. Its been in 5xs and thay said it was an acceptable idle...............and man it is rough

------------------
1997 F-150 XLT 4.6 REGULAR CAB, FLARESIDE PACIFIC CLEARCOAT GREEN 5-SPEED. WESTIN NERF BARS, POWER EVERYTHING,BUG SHIELD, EX-TANG SOFT COVER, BED LINER(FORD).

Better 1/2 : 92 Red T-Bird.

 

THANKS EVERYONE FOR THE INFORMATION. KEEP IT COMING.

 

most definately mine has a rough idle since the day i bought it has a 4.2l v6 still havent figured it out yet

 

i have a 00' f150 that what seems to be a little rough idle but i also get a small vibration at 1500rpm and 2200rpm i only noticed it after i had a oil change and i think they used crappy oil i am going to try a different oil and hope that fixes it

 

62,000 miles and never a sputter, or cough, 97 4.6 SC4x4

 

I just got my 2001 F-150 4.6 Romeo (trytorun V8) back from the dealer again today. It's idled rough since the day I picked it up. The dealer has gone over all the gimmicks i've seen mentioned here. Air sensor changes, Computer resets , engine vibration analysis etc.

According to service they have identified a fix. The following is a direct quote from my service invoice "Ford will be releasing a techincal service bulletin (TSB) probably in the fall for this fix. It will probably consist of replacing motor mounts and reprogramming the PCM."

I hate to be negative but I have zero confidence this will resolve the issue. My novice opinion is that relatively static components such as motor mounts will function the same regardless of temperature & weather conditions. The vague wording makes me even more suspicious. This information supposedly came from the Ford hotline. I'm very curious to see if anyone else gets the same story or can verify the rumored TSB.

Till then i'll have to tolerate having my filling shake loose at every light until I can get enough shop time to start Lemon law procedings. Good luck everyone !

 

106,880 and no rough idle yet, but my fingers are crossed, because now that I have said no, it will get one, even if I knock on wood.

 

Yes, my 99 F150, 4.6 Romeo has idled rough since day one. It's annoying, but does not stumble or hesitate as some have indicated. I have no mods and approximately 17,000 miles.