Ok i have had my vibration at idle problem for more than a year. Lately it has gotten worse. Car has been basically rebuilt. I have realized lately my pulley belts vibrate when turning steeering wheel. DOes same thing with ac and when alternator needs a load like turning on headlights.
I thought it might of been my ac since idle drops sometimes but idle don't drop when ac cuts on. Idle will stay the same and car will just have a vibration and get worse at 825 or below.
I keep coming back to harmonic balancer. It must be that.
Can't be iacv as idle don't drop with ac coming on. It just vibrates.
Rear motor mount changed and it got a little worse. Due to Chinese crap which i am changing back soon.
Maybe alternator or voltage regulator but ruled those out also.
If it was alternator then it would vibrate with alternator changes possibly and
not ps pump belt(turning wheel).
If it was voltage regulator my volt readings would be low and they are a bit but not low enough to say VR is bad. It still holds decent volts at higher rpms. It just alternator isn't new and it is a cheap 5 year old autozone one. Maybe i should get a higher amp or a smaller pulley put on.
So back to harmonic balancer, dampener, crankshaft pulley, crankshaft dampener. Whatever u want to call it. I really think harmonic dampener is the best name for it. I am thinking the rubber inside is slowly separating and causing this. The outside of the harmonic balancer is where the ps belt line is and this part would cause the vibrations if rubber was cracked and separating. Doesn't the ps pump need less power than the ac compressor? So all this being true i have to think the Harmonic dampener is my prime suspect. My drivers motor mount hasn't been changed but again what would this have to do when i turn wheel and i get those vibrations or when i turn headlights on and get a slighter vibration for a second.
One last symptom is i can visually see the ps pump shake some and the alternator. The alternator shakes very slightly with the ps pump more but neither are violently.
A possible problem is motor mounts need to be reset but i personally put that in a much lower probability. Anyone got any thoughts?
Oh yeah. All this vibration stops when car rpm is above 900. Below 900 rpm's it just gets worse and worse. Given some accessory is being used like ps , ac or alternator needs to produce more like turning headlights on. At 750 the ps pump is shaking a lot more. The ps pulley has been checked and my car is a manual tranny.
I thought it might of been my ac since idle drops sometimes but idle don't drop when ac cuts on. Idle will stay the same and car will just have a vibration and get worse at 825 or below.
I keep coming back to harmonic balancer. It must be that.
Can't be iacv as idle don't drop with ac coming on. It just vibrates.
Rear motor mount changed and it got a little worse. Due to Chinese crap which i am changing back soon.
Maybe alternator or voltage regulator but ruled those out also.
If it was alternator then it would vibrate with alternator changes possibly and
not ps pump belt(turning wheel).
If it was voltage regulator my volt readings would be low and they are a bit but not low enough to say VR is bad. It still holds decent volts at higher rpms. It just alternator isn't new and it is a cheap 5 year old autozone one. Maybe i should get a higher amp or a smaller pulley put on.
So back to harmonic balancer, dampener, crankshaft pulley, crankshaft dampener. Whatever u want to call it. I really think harmonic dampener is the best name for it. I am thinking the rubber inside is slowly separating and causing this. The outside of the harmonic balancer is where the ps belt line is and this part would cause the vibrations if rubber was cracked and separating. Doesn't the ps pump need less power than the ac compressor? So all this being true i have to think the Harmonic dampener is my prime suspect. My drivers motor mount hasn't been changed but again what would this have to do when i turn wheel and i get those vibrations or when i turn headlights on and get a slighter vibration for a second.
One last symptom is i can visually see the ps pump shake some and the alternator. The alternator shakes very slightly with the ps pump more but neither are violently.
A possible problem is motor mounts need to be reset but i personally put that in a much lower probability. Anyone got any thoughts?
Oh yeah. All this vibration stops when car rpm is above 900. Below 900 rpm's it just gets worse and worse. Given some accessory is being used like ps , ac or alternator needs to produce more like turning headlights on. At 750 the ps pump is shaking a lot more. The ps pulley has been checked and my car is a manual tranny.
Comment