I have the 4.2L V-6 and it just started to run rough and miss. I've had a terrible squeal, like a loose or bad belt. I changed the belt and the squeal reduced, but did not go away. A friend said to spray WD40 on the pulley bearings. I haven't had the squeal in two weeks. As for the missing ,At first I thought it was systemic of the transmission going (since I've pulled a motorcycle trailer all over Michigan this last summer), but when I took it to a dealer, they said 499.89 please. Thats for a Cam Position Sensor, Syncronizer, and cleaning the fuel injectors. My questions are: Could this really be the problem? and I've read that you should flush the injectors, will this hurt them?

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• 1999 F150
• 4.2L V-6 Auto w/ Air
  [*}Short Bed Extended
  Cab (4 doors)

 

Is the squeaking/squealing coming from the passenger side? Gets louder once in gear.
this is what I've got and was told it was the idler pulleys which would be around $40 for new ones.

 

I had the same missing problem. I notice it more when the vehicle is cold and on hard acceleration. I took it the dealer and here is what they did.
1.Replaced the cam sensor.
2.Cleaned and power flushed the injectors.
3.Replaced Spark Plugs.
4.Replaced Air Filter.
5.Replaced one of the 4 O2 sensors.

After all this it ran great for about 3 days. Then it started all over again. I have had it to the dealer 8 times for this, and they wont fix it unless the check engine light comes on!! I am leasing the truck and if it goes back again, im going to try to get out of my lease. Il never buy a V-6 truck again !!!i hope this information helps you in the quest to get your truck fixed - good luck..

Ed

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Ed

• '97 F-150 2wd 4.2l Auto, Supercab
• 265/75 R16
• Catback system
• Airtornado
• K&N system
• 3.55 gears
• Superchip
• 10 disk CD Changer
• Soon to have 75 shot of NOS, 3" lift kit and 4.11 gears.

 

OK Check this out
mine runs like S*** now also
See "help quickly, missing surging"
Did all that and nothing still
Next week I'll be replacing the valve cover
Do a search for this part number to see why "XF2Z-6582-CA"
Then ill start replacing the PCV and all the O2s to see if it helps.
Hope this has helped
Hope this problem gets fixed soon!

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1999 F150 4x4 sport package,4.2 V6
planning lots of mods
So far:Panasonic in dash off road CD player, 85 watt driving lights, diamond blue headlights 55 low 100 high, 55 watt driving lights on rear, added switch panel above radio (chrome!), added fuse box for new acc., floormats, Class III reciever, Y pack to dual 13" tips.
Future:8" straight axle lift, 37" SSRs