just cant seem to figure it out

[tompa00]

i have a 93, 351 bronco. i got to start it and it makes a whinning noise w/ a vibration in the gas pedal, not horrible but enough to notice. it will go for a few seconds, stop, then a few more seconds, stop. does this like 3-4 times. this noise/vibration also occurs while im driving. ive notice it when im at a steady rpm (1500), mainly around 45mph. ill let off the gas or accelerate above that and it will stop. can anybody help me out. i really need to fix this. im moving halfway across the country at the end of summer and she has to get me there. thanks everyone.

 

[miesk5]

Can you have someone check under the hood with a piece of old garden hose, shop vac hose or a gift wrap cardboard tube and use it as a stethoscope to pin-point the problem area (be careful of fan/belts!)

A few guesses:

idler pulley

fan clutch

tensioner could be tight/seized, putting tension on the alternator bearing, & bearing failure (does it sound high pitched?)

also, do you have the AC or defroster on when this happens?

i have a 93, 351 bronco. i got to start it and it makes a whinning noise w/ a vibration in the gas pedal, not horrible but enough to notice. it will go for a few seconds, stop, then a few more seconds, stop. does this like 3-4 times. this noise/vibration also occurs while im driving. ive notice it when im at a steady rpm (1500), mainly around 45mph. ill let off the gas or accelerate above that and it will stop. can anybody help me out. i really need to fix this. im moving halfway across the country at the end of summer and she has to get me there. thanks everyone.

 

[tompa00]

Can you have someone check under the hood with a piece of old garden hose, shop vac hose or a gift wrap cardboard tube and use it as a stethoscope to pin-point the problem area (be careful of fan/belts!)

A few guesses:

idler pulley

fan clutch

tensioner could be tight/seized, putting tension on the alternator bearing, & bearing failure (does it sound high pitched?)

also, do you have the AC or defroster on when this happens?

i have an electric cooling fan installed. no its not a high pitch noise and it happen with the ac/defrost on or off.

 

[miesk5]

i have an electric cooling fan installed. no its not a high pitch noise and it happen with the ac/defrost on or off.

ok, that helps to know; can only guess from here as to what the problem is.

ck out with the garden hose to pin-point the noise area.