I repair all the head gaskets in my truck ,change fluids ,spark plugs, wires, water pump, vacum lines ,u.joints,center bearing on drive shaft ,rotation and balance ,tires in a good shape .
i"m having a vibration problem ,some times it"s strong and somtimes it"s weak ,the sound comes of the area in between the engine and the trans.
mostly it does happen after i take a turn and try to accelerate ,then i get this weird grinding noise ,i release the gas and push back and the problem fixed
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Re: vibration during acclerating .ford f150 91
2 piece drivelines have to be properly put together at carrier bearing, one spline off in either direction, you get vibration,get under truck, compare front and rear sections of driveline, if u-joints don't line up,it' out of balance
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-Sounds like blow head gasket, broken or burn valve.
-Do compression check each cylinder to see what you have and compare to its specification.
-Was it recently rebuild?
If so then timing might be off.
spark plug wire connect to the wrong spark plug.
Vacuum line might connect to the wrong line.
Bad rotor or cap .
Check intake, compression, ignition, exhaust & vacuum. If the intake &/or the exhaust is blocked/clogged it won't run. If the radiator acts like old faithful while you crank it, it has a blown head gasket, cracked head & or a cracked block. If the radiator is dry or has very little in it, check the oil & the exhaust for antifreeze/water. If you find antifreeze/water in the oil &/or the exhaust, it has a blown head gasket or cracked head/block. Check the compression. If water/antifreeze shoots out of the spark plug holes (take all the spark plugs out for the compression test) during the compression test, it has a blown head gasket &/or a cracked head/block. Check the ignition w/a spark plug tester that you can buy at parts stores for $10 or less. Some of them you just hold the tip close to the plug wire or touch the rubber boot on the spark plug so the tester can pick up the pulse from the wire/plug via induction. Others are put in line between the plug wire & plug. Unplug the computer connectors & check for corrosion. You can clean them by plugging/unplugging the connectors multiple times or maybe you can use a small piece of emery cloth or an emery board. Make sure to blow any dust out of the connector. Check the vacuum hoses. All hoses on a vehicle get brittle & crack w/age, then they leak. Use a vacuum gage to check vacuum. I hope that you find the solution & get your Ford running again.
The easiest thing is to make sure the firing order is correct with the spark plug wires. You may have 5 and 3 spark plug wires crossed. Also, was this vehicle running ok before the head gasket repair???
ford has a technical service bullitin out on this vehicle for the intake gaskets leaking causing a vacum leak that set codes 171 174. the solution is to have the intake manifold gaskets replaced . call your local ford dealer and see what thay can tell you about this bullitin.
So you're saying it starts to shake as soon as you put it in gear? If so, you probably have a dead spark plug or plug wire, or disconnected plug wire. It could be something more serious. Head gasket, cam shaft, timing chain. Try the plugs and wires first, and go from there.