Ford Ranger Problem Report

Ford Ranger Engine Buck/Misfire at Freeway Speeds

(60 reports)

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.

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 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. -
Engine misfire or bucking on acceleration. Net fixed yet. -
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.... -
Bucking, misfiring, check engine light flashing, mechanic checked and no codes appear. -
have not had problem repaired yet. just looking at the cause. will check for repairs soon. -
Engine Buck/Misfire at Freeway Speeds -
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 ) -
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! -
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. -
Truck sputters when picking up speed on the highway , speeds vary -
check engine light illuminated, engine bucks when accelerating after warmup. -
Misses at high rpm.not fixed -
can't get above 3000 rpms while sitting it misfires, under load it runs it runs ok -
Hard to start. Stalls bucks and back fires on acceleration. Bogs down under load or on incline. -
Same bucking and no code most of the time. Had a code for cylinder 5 misfire once. -
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