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Hello. Based on your initial description, it sounds like a wheel bearing. Does the sound change at all while turning or going around curves in either direction?
It is completely nonexistent when at cruising speed?
I think it is most likely just not noticeable unless your decelerating. all the same items within the drive train are moving whether at cruising speeds or upon deceleration. The main difference is when slowing down the weight shifts to the front of the vehicle, making items like bad bearings more noticeable. Thats why I had asked about taking curves. Curves place more weight on the bearing and make the sound more pronounced when a bearing is bad.
Does it sound like it's coming from the front or the rear of the van?
wheel bearings make more of a whining or moaning sound, When they are very bad they will make a grinding sound, but that's when they are very bad. You usually don't feel it in the steering wheel. Without hearing it I can not say for certain what it is, but do you have access to a mechanics stethoscope?
Does it sound more like air whistling?
does it seem to be running well? or is it a little rough?
can you have somebody sit in the car and rev the engine and let off the gas while you stand in front with the hood open and listen to see if it will do it when not in motion?
I am wondering if it is the alternator or the water pump. I have heard alternators make terrible whistling sounds before but need to know if it will do it when not in motion
Let me check for TSBs, hold on
Ok. No TSBs, so rather than have you check a million things, I am going to opt out so somebody who has experienced this can chime in. Dont accept my answer as I have not provided the solution to your problem. Sorry I couldn't have been of more assistance.
hi, have you noticed a higher idle or lower idle than usual ?
have you checked the pcv hose or valve ?..jazzmaster ..