All ActivityMost RecentMost LikesSolutionsv10 codep0191stoped at auto zone and they ran a check on the E350 ,code was p0191 engine runs good BUT I found 2 metal vaccum pipes that are joined to gether with a rubber hose near the fuel filter, the rubber hose was burned real bad,replaced the vaccum hose with fuel line hose, the hose receives a lot of heat from the left exh pipe,,I also have changed the fuel filter now I need a test run 200mi plusck eng light v10 e350 superduty comes onback home now ,put 4000mi on the engine this summer and reset the light many times,the rv runs great up to 10mpg..stoped at auto zone and they said the code was P0191 and it could be fuel pump,,fuel pressure regulator,fuel filter,or fuel rail pressure sensor,I replaced the fuel filter in 2012 and I have the same thing going on,, light on..what do you thinkRe: ck engine light v10on the road and ck engine lite comes on when fuel gage reaches 3/4Re: Had first blowoutmy old tires were michelin ltx load E they were 5yrs old with 25000mis on them.we went to AK with old tires ,,total miles put on tires were 10,000mi the tires never gave up.my new tires are michelin LTX..AK roads are good CANADA roads up north will destroy a rvck engine light v10on the road,will have auto zone give me the code in sept when i return home.I have put 3 gas caps on ,2 with key locks and newest one has no key bought from napa,when I fill up my tow car geo tracker you can here air going in when you take the cap off,, my 2004 rv E350 makes no noise when the cap comes off,,,I have removed the grd wire from the batt to reset ck engine light..will be back on the road in 2 daysck engine lite comes on v10ck engine lite comes on when fuel gage reaches 3/4 full auto zone readout on codes calls for fuel system,, engine runs good, gas mpg is 9-10.fuel filter hasbeen changed what is wrong