Mysterious 351m problem
Thread Starter
|
Senior User
Joined: Oct 2006
Posts: 194
Likes: 0
Mysterious 351m problem
Hello every 1,
Ok what i got is a 3yr. old rebuilt 351m. rebuilt motocraft carb. evrything is pretty much stock.
problem strted about a month ago. once i got closer to 50 mph accelerating and decelerating i would get an odd vibration an deep bass like sound. I was concerned but didnt worry. its a daily driver and i guess i subconsciously got used to it.My uncle borrowed the truck to haul some junk and said it was running real funny, missfiring or something. So i hoped in and as soon as i put it into gear and stepped on the gas, it started shaking, so much my antenna was "twanging". After about 25-30 mph its not really bad.
I replaced ll the plugs ( one was coverd in oil # 5), i got a new cap and rotor, new plugs, new fuel filters,cheked for vacuum leaks with carb cleaner, checked timing, adjused carb.I have 2 motorheads helping me out and my dads an arcraft mech. (pretty good with cars, it was his truck for 20 years).
Cant figure out what the problem is.
Gonna do a compression test tomorrow.
my guys think its a bent rod (no clanking tho.), carb problem, or still electrical.
pardonmy gramar, im mentally exauhsted.
thanks in advance for help.
( will also post 335 section)
Ok what i got is a 3yr. old rebuilt 351m. rebuilt motocraft carb. evrything is pretty much stock.
problem strted about a month ago. once i got closer to 50 mph accelerating and decelerating i would get an odd vibration an deep bass like sound. I was concerned but didnt worry. its a daily driver and i guess i subconsciously got used to it.My uncle borrowed the truck to haul some junk and said it was running real funny, missfiring or something. So i hoped in and as soon as i put it into gear and stepped on the gas, it started shaking, so much my antenna was "twanging". After about 25-30 mph its not really bad.
I replaced ll the plugs ( one was coverd in oil # 5), i got a new cap and rotor, new plugs, new fuel filters,cheked for vacuum leaks with carb cleaner, checked timing, adjused carb.I have 2 motorheads helping me out and my dads an arcraft mech. (pretty good with cars, it was his truck for 20 years).
Cant figure out what the problem is.
Gonna do a compression test tomorrow.
my guys think its a bent rod (no clanking tho.), carb problem, or still electrical.
pardonmy gramar, im mentally exauhsted.
thanks in advance for help.
( will also post 335 section)
New User
Joined: Jan 2008
Posts: 0
Likes: 24
May I suggest the 335 series engine forum or the rebuilding forum ?
This topic has Nothing to do with being a 73-79 truck specific.
The topic is an Engine only.
IMO, There are way too many actual 73-79 specific threads getting pushed to other pages.
If one wants the expertise of reg 73-79 forum people.
Just let us know you posted in the proper related forum and we'll go there.
We are more than willing to help ...anyone ..
Lately... It's getting to be like ....what is the best tissue to put in my Truck .. oh ya..it's a 78 ?
" A place for everything ...and everything in its place "
This topic has Nothing to do with being a 73-79 truck specific.
The topic is an Engine only.
IMO, There are way too many actual 73-79 specific threads getting pushed to other pages.
If one wants the expertise of reg 73-79 forum people.
Just let us know you posted in the proper related forum and we'll go there.
We are more than willing to help ...anyone ..
Lately... It's getting to be like ....what is the best tissue to put in my Truck .. oh ya..it's a 78 ?
" A place for everything ...and everything in its place "
