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1999 Engine Buck/Misfire at Freeway Speeds

The engine may misfire and/or buck while driving at freeway speeds with no fault code stored in the powertrain control module (PCM). This can be caused by an intermittent fault with the camshaft synchronizer assembly. This condition can be diagnosed by monitoring knock sensor data as per Ford service bulletin #05-22-12. Replacement of the synchronizer assembly will be required to correct this concern.

Affected Model Years

This issue affects model years 1990, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, .

279 people reported this problem

  • 1999 46,000 Miles
    merging onto freeway the truck has severe bucking when accelerating up to highway speeds. Then stops while cruising at steady speed. only happens under strong acceleration .(i.e. going up steep hill, merging onto highway )
  • 1999 125,000 Miles
    engine would buck & stutter as you would try to accelerate. so far there has not been anyone able to find the problem for me.
  • 1999 126,624 Miles
    once you hit around 45 to 50 mph, the truck will shift into overdrive and the rpms will drop from 2500 to 1800...then you feel the truck start to buck or jump or miss..
  • 1999 98,000 Miles
    cold start engine idles smooth. drive till warm ,shut off engine for about 5 min. restart,engine misses at idle. misses badly at 45 to 55 mph.smooths out at higher rpm.comes back in lower range of over drive.so far i have replaced plugs snd plug wires,ran injector cleaner.no codes or check engine light.fuel press. at 40 psi.still misses.
  • 1999 110,000 Miles
    Engine misfire or bucking on acceleration. Net fixed yet.
  • 1999 122,000 Miles
    My ranger does this bucking as we'll and sometimes at idle it runs very rough, no cel lights at all. I changed the wires plugs and fuel filter still runs terrible!
  • 1999 269,998 Miles
    when I start my truck it starts right up. and then it dies because it idles really ruff. its been stuttering and kicking every time I press the gas. sometimes when I try to start my truck I have to keep on turning it over intell it turns on and then I have to rev it up to like 4 to 4500 rpm. intell it sounds like its good and it idle fine intell I put it in drive and then it just dies again. I need this problem fixed quick. I already replace sparkplugs, idle control vavle.
  • 1999 240,000 Miles
    Bucking, misfiring, check engine light flashing, mechanic checked and no codes appear.
  • 1999 120,000 Miles
    engine misses at 45 to50 mphengine feels like it is holding back when in passing gear
  • 1999 0 Miles
    Truck sputtering when accelerating
  • 1999 78,000 Miles
    misses at driving speed (2000 R.P.M.) only . Idle good.
  • 1999 165,000 Miles
    Engine would buck, jerk spit and sputter when accelerating hard. Sometimes at random times at 2000 rpms or so. Spend over $ 3000 trying to fix it...
  • 1999 106,000 Miles
    truck bucks and cuts out when giving gas usually in 4th to overdrive. Also happened on a 2000 automatic at 200000 miles....
  • 1999 195,000 Miles
    has a hard mis fire when getting up to the speed up to 70
  • 1999 144,600 Miles
    Engine Buck/Misfire at Freeway Speeds
  • 1999 123,000 Miles
    I have a 2000 ford ranger 3.0 flex fuel. The motor was just rebuilt. The engine runs rough. There are no CEL on. The motor misses while accelirateing but smooths out until it kicks into over drive and then it misses until I let off the gas. I did not replace the synchrozier but I did replace the cam position sensor. It has new plugs and wires on it.
  • 1999 200,000 Miles
    Manual trans. Go 65-70 then all of a sudden bogs down to 45-50 and I need to go into 4th gear to accelerate.
  • 1999 0 Miles
    Engine bucks misfires sputters and dies on takeoff
  • 1999 148,000 Miles
    Buck and jerks at 80 mph.
  • 1999 82,000 Miles
    have not had problem repaired yet. just looking at the cause. will check for repairs soon.

1999 Common Problems