Engine Buck/Misfire at Freeway Speeds on Ford Ranger

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.

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Average mileage: 124,577 (11,300–271,000)
Engines affected: 2.3L 4 Cylinder, 2.5L 4 Cylinder, 3.0L V6, 4.0L V6
9 model years affected: 1993, 1999, 2000, 2001, more2002, 2003, 2005, 2006, 2009
64 people reported this problem
31 people shared problem details
2000 Ford Ranger- 4.0L V6125,000
engine would buck & stutter as you would try to accelerate. so far there has not been anyone able to find the problem for me.
32 people like thisFlag inappropiate
2000 Ford Ranger- 3.0L V698,000
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.
26 people like thisFlag inappropiate
2001 Ford Ranger- 3.0L V6126,624
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..
18 people like thisFlag inappropiate
2000 Ford Ranger- 3.0L V6120,000
engine misses at 45 to50 mph engine feels like it is holding back when in passing gear
17 people like thisFlag inappropiate
2003 Ford Ranger- 2.3L 4 Cylinder78,000
misses at driving speed (2000 R.P.M.) only . Idle good.
14 people like thisFlag inappropiate
2001 Ford Ranger- 2.3L 4 Cylinder110,000
Engine misfire or bucking on acceleration. Net fixed yet.
13 people like thisFlag inappropiate
2000 Ford Ranger- 4.0L V6195,000
has a hard mis fire when getting up to the speed up to 70
9 people like thisFlag inappropiate
2000 Ford Ranger- 3.0L V6106,000
truck bucks and cuts out when giving gas usually in 4th to overdrive. Also happened on a 2000 automatic at 200000 miles....
6 people like thisFlag inappropiate
2003 Ford Ranger- 4.0L V6240,000
Bucking, misfiring, check engine light flashing, mechanic checked and no codes appear.
6 people like thisFlag inappropiate
2003 Ford Ranger- 3.0L V682,000
have not had problem repaired yet. just looking at the cause. will check for repairs soon.
5 people like thisFlag inappropiate
Truck sputtering when accelerating
1 person likes thisFlag inappropiate
2002 Ford Ranger- 2.3L 4 Cylinder200,000
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.
1 person likes thisFlag inappropiate
2002 Ford Ranger- 4.0L V6144,600
Engine Buck/Misfire at Freeway Speeds
1 person likes thisFlag inappropiate
2002 Ford Ranger- 3.0L V646,000
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 )
1 person likes thisFlag inappropiate
1999 Ford Ranger- 4.0L V6122,000
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!
1 person likes thisFlag inappropiate
2000 Ford Ranger- 4.0L V6150,000
ENGINE STALLS AND BUCKS. SOMETIMES WILL NOT RESTART.
1993 Ford Ranger- 4.0L V6
Feels like loses power and cuts on and off going down the road I can push in the clutch and it will cut in and out how to play with the gas to keep it going hello
2002 Ford Ranger- 4.0L V6100,000
Truck sputters when picking up speed on the highway , speeds vary
2001 Ford Ranger- 3.0L V697,000
check engine light illuminated, engine bucks when accelerating after warmup.
2003 Ford Ranger- 3.0L V6108,000
Misses at high rpm.not fixed
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