Crankshaft problems
Crankshaft: Spinning mechanical piece that receives the movement of the pistons and transmits it to the gearbox.
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Running very bad acts like it's not getting gas no acceleration 
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Ford F-150 2001 Expedition 5 4 256000 miles
Ok started of only on inclines rough run back fire no acceleration sometimes die completely. Now it is permanent I have changed plugs coils camshaft sensor crankshaft sensor fuel filter. After repairs it runs idles great 5 minutes then back like crap
2 reports
2
SL
Try cleaning your Mass Air Flow senser with cleaner from part store make sure it's for that senser n clean up throttle body real good with cleaner too. Also change out your PVC valve. I also had cooling fans not coming on as needed replaced couple relays n all is good now. Also check temperature control senser. Had same problems. Truck runs so much better now.
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Best answer (according to Expy)
EX
I ended up changing fuel pump and fuel pressure sensor the 1 on tank ran good for a week rite back missing barley would stay running at all disconnected mass air flow sensor not a problem since and getting better gas mileage than ever 16.8 to 17.3 interstate
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CommentCrank no start
Ford F-150 1998 4.2 175000 miles
I have changed fuel pump fuel regulator checked relay crankshaft sensor camshaft position synchronizer I'm getting spark an getting fuel to the rail an I can spray starter fuel in it an it runs till starter fuel burns off
3 reports
Have you checked the fuel pump shut off switch. Should be on the passenger side wall under the dash...
CommentNo power to fuel pump no power in fuses 11,12 in cab
Ford F-150 1997 F150 4.6ltr. Automatic 355000 miles
Check to fuel pump it's good change the crankshaft sensor I've checked the relays they are fine check inertia switch switch and reset it could the PCM wiring harness have issues where it clips into the computer itself
8 reports
CommentInternal lubrication
Ford F-150 2007 2000000 miles
I have a Ford fx4, 5.4L motor, 2007 and it is having some failure in the cylinder head where the crankshaft is located. The problem is caused by a lack of lubrication and it makes a worrying noise. How can avoid this from happening?
1 reply
Buddy you should have an engine wash, then add its 5w-20 semi-synthetic oil and the problem should be solved.
CommentCrank but no start. No spark to any coils
Ford F-150 2007 5.4 triton 3 valve 168000 miles
Hello I have a 07 f150 that died out at the light and would not restart. Replaced battery which was 9 years old and done for. I have checked fuel which I’m getting it is reading at range on scanner. Crankshaft, cam sensors are good. Ignition module is good, I checked fuses believe all the ones I needed. Swapped pcm fuse with another. I I have no spark to any cylinder. Starting fluid did nothing as well. Will crank but not start.
10 reports
Won't start
Ford F-150 2001 4.6 336000 miles
Ok my dad was driving and he said everything just shut off on him. I changed out the alternator, battery, starter, starter relay, and PCM relay. Fuel pump I can hear, I can turn the crankshaft by hand. I checked all fuses and other relays some fuses ain't getting any power to it. Could it be the PCM? I don't wanna change that out a second opinion. Someone anyone please help.
8 reports
Runs like poo one minute then ok the next
Ford F-150 2008 Fx4 v8 0 miles
Ok so ill be driving amd everything will be ok untill i slow down to a stop then it idles very low so low it stalls it doesn't do it all the time but mostly when i put it in reverse... the only reason i think it does it in reverse more is because it has the most torque so you dont have to use as much of the gas pedal to get it going which results in the low idle stalling... i replaced the crankshaft position sensor and cleaned the maf sensor... any info would help please and thank you
1 report
My Ford F-150 bogs down at stops
Ford F-150 2007 F150 lariat 5.4v8 275000 miles
So I have a Ford F-150 and I have literally replaced both camshaft position sensors the crankshaft position sensor I have also replaced the fuel pump driver module I've replaced all the spark plugs all the coil packs and for some reason it's still bogs down when I come to a stop it will bog down and start to sound like a diesel does anybody have any suggestions
9 reports
#30 fuse continue to blow
Ford F-150 1999 Ext Cab 5.4 210000 miles
It will turn over but will not start! Start after change crankshaft sensor tuna few miles but blow again!
4 reports
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