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.Google+
Car Problem Reports
Ford Ranger Engine Buck/Misfire at Freeway Speeds
Ford Ranger Problem
Engines Affected: 2.3L 4 Cylinder, 2.5L 4 Cylinder, 3.0L V6, 4.0L V6
Average Mileage: 122,683 mi (11,300 mi - 271,000 mi)
Visitor, 2000 Ford Ranger, 4.0L V6, 125,000 mi
engine would buck & stutter as you would try to accelerate. so far there has not been anyone able to find the problem for me.
Visitor, 2000 Ford Ranger, 3.0L V6, 98,000 mi
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.
Visitor, 2001 Ford Ranger, 3.0L V6, 126,624 mi
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..
Visitor, 2000 Ford Ranger, 3.0L V6, 120,000 mi
engine misses at 45 to50 mph
engine feels like it is holding back when in passing gear
Visitor, 2003 Ford Ranger, 2.3L 4 Cylinder, 78,000 mi
misses at driving speed (2000 R.P.M.) only . Idle good.
Visitor, 2001 Ford Ranger, 2.3L 4 Cylinder, 110,000 mi
Engine misfire or bucking on acceleration. Net fixed yet.
Visitor, 2000 Ford Ranger, 4.0L V6, 195,000 mi
has a hard mis fire when getting up to the speed up to 70
Visitor, 2000 Ford Ranger, 3.0L V6, 106,000 mi
truck bucks and cuts out when giving gas usually in 4th to overdrive. Also happened on a 2000 automatic at 200000 miles....
Visitor, 2003 Ford Ranger, 4.0L V6, 240,000 mi
Bucking, misfiring, check engine light flashing, mechanic checked and no codes appear.
Visitor, 2003 Ford Ranger, 3.0L V6, 82,000 mi
have not had problem repaired yet. just looking at the cause. will check for repairs soon.