2001 Ford F150 V8 Four Wheel Drive Automatic
My '01 f-150 4.6l has begun to make a rattaling noise during idle. When I first heard the noise I expected lifters or springs, (I changed the oil filter and oil and added an addative.) But in listenning and inspection it does not seem lto me like that problem due to the fact the knocking does not increase w/ rpm, but more so disipate. It stays consistant on idle during cold start and full tempature. The noise is like a metel rattle on the right side mostlikely in front lower region (tensioner, ac and pully area). We thought maybe bearings. I checked for movement of pully, tensioner, crank shaft, alt. And water pump with belt off and didnt really notice any. I am afraid it may be timing chain related. During idle it seems to stay mostly steady with times of ranging tempo and volume. Any ideas of my trobleshooting or any ideas of what it maybe or even were to start? Other problems with fuel ratio, low idle, almost stalling after deceleration, eratic Rpms on idle, shortage of power and spark plug missfire were also recently an issue. I belive I have fixed those problems with new spark plugs, new pcv valve and fuel filter, but however I have not driven only ran the motor after these fixes. Whats your take on this?
Thursday, March 11th, 2010 AT 7:30 PM