Still Stumped Whats that Noise?
#1
Still Stumped Whats that Noise?
m stumped, yesterday I replaced the cam synchronizer thinking it was my problem, nope. I still have this crazy noise coming from the motor? I just dont know where to go next? at first I was thinking pilot bearing or the clutch slave, but noise doesnt change it you push the clutch in. ive checked the vacuum lines and pulled the serpentin pelt off. when you turn the motor off you can hear it wind down for a second while the motor stops. I 4th or 5th gear at low rpm if you accelerate it will go away like vacuum until the motor catches up to it. I was thinking cam sync because the churp, chirp wurrr was different than the rpm of the motor. whats left? oil pump?
#2
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#3
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"4th or 5th gear at low rpm if you accelerate it will go away"
Yes, that would be vacuum, when you open the throttle the vacuum in the intake drops, if you do that with a high load(low speed/RPM, 4th/5th gear) vacuum drops very very low
Passenger side down low at the front is the Vacuum reservoir ball
This is where its located: https://www.explorerforum.com/forums...obe-jpg.39621/
That picture is with the fender removed, lol, you don't need to remove the fender to access it, it is just a good picture for where it is on the vehicle, down low on passenger side
Yes, that would be vacuum, when you open the throttle the vacuum in the intake drops, if you do that with a high load(low speed/RPM, 4th/5th gear) vacuum drops very very low
Passenger side down low at the front is the Vacuum reservoir ball
This is where its located: https://www.explorerforum.com/forums...obe-jpg.39621/
That picture is with the fender removed, lol, you don't need to remove the fender to access it, it is just a good picture for where it is on the vehicle, down low on passenger side
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#6
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#7
Well just pulled the line that went to the motor plugged the vacuum reservoir ,,,,,, no change. its pretty loud with a whuur whuur kind of beat to it. I dont think its at the same rpm as the motor? I'll pull the serpentine belt and see if I can pin point it some how? you would think its vacuum by what it does, but ive pulled all the major and minor vacuum lines off the manifold, you would think if it was vacuum that would do it, nope?
Last edited by docm; 03-26-2022 at 05:55 PM.
#8
im not sure what to do? acts like vacuum but there's noting left to check. I'll go over all major vacuum ports on the manifold. its pretty loud and changes some with rpm, not there over 3000 rpm? im pretty sure its differently in the motor. I'll pull the serpentine belt soon because its much quieter with out all things going around. Im still looking for ideas, camshaft bearing? thanks
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solved but not fixed, instead of having positive crank ventilation I have negative , there's quite a bit if I put my thumb over the valve cover hole where the PCV valve goes. if I cover the hole with my thumb the noise will start. so what is this? im going to start a new thread. the noise is found, if I leave the PCV valve out it won't make the noise. now to find it.
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