Engine Buck/Misfire at Freeway Speeds on Ford Ranger

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 137,340 (11,300–271,000)
Engines affected: 2.3L 4 Cylinder, 2.5L 4 Cylinder, 3.0L V6, 4.0L V6
17 model years affected: 1990, 1992, 1993, 1994, more1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009
154 people reported this problem
Viewing 1 - 20 of 50 comments
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 )
engine would buck & stutter as you would try to accelerate. so far there has not been anyone able to find the problem for me.
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.
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..
Engine misfire or bucking on acceleration. Net fixed yet.
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!
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.
Bucking, misfiring, check engine light flashing, mechanic checked and no codes appear.
Truck sputtering when accelerating
engine misses at 45 to50 mph
engine feels like it is holding back when in passing gear
misses at driving speed (2000 R.P.M.) only . Idle good.
has a hard mis fire when getting up to the speed up to 70
truck bucks and cuts out when giving gas usually in 4th to overdrive. Also happened on a 2000 automatic at 200000 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.
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...
Engine Buck/Misfire at Freeway Speeds
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.
Buck and jerks at 80 mph.
Engine bucks misfires sputters and dies on takeoff
have not had problem repaired yet. just looking at the cause. will check for repairs soon.