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sharmon ball
Dodge Dakota
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11/28/2004
12:14:12
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 Subject: Humming from front end in R trun
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Message:
Hello forum,
Looking for some advice on a strange phenomenon that has begun to occur quite loudly in my 2000 ext. 3.9L w/ 117K. It only seems to happen in R hand turns and is getting louder, could be my sensitivity to it now.
What Ive done. My uncle and I have replaced the power steering fluid with a mixture of mostly a Lucas P/S addative and some regular P/S fluid. We had high hopes on a return valve being stuck or clogged with s*#@ over years of neglect to the system. Thats my fault.
Im starting to think it might be bearing related. What does the forum think?????????
It is also starting to stall once in a while after it has been driven and comes down to an idle? Has this issue been resolved yet by anyone?
Thanks
Sharmon
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LilRed01
Dodge Dakota
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11/28/2004
15:31:29
|  RE: Humming from front end in R trun
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Message:
your humming noise does it do it driving, if yes then it sounds like a Left front wheen bearing.
your stalling could be a dirty IAC and Throttle plate try cleaning those.
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sharmonball
Dodge Dakota
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11/28/2004
16:29:55
|  RE: Humming from front end in R trun
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Message:
Thanks for the reply.
Yes, the humming only occurs when driving. I am suspecting a wheel bearing at this point.
What is the IAC?
Thanks again for the advice.
-Sharmon
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joe
Dodge Dakota
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11/28/2004
17:30:20
| RE: Humming from front end in R trun
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Message:
here ya go sharmonball
(from speed tweaks)
How to Clean the IAC Solenoid:
This is recommended at every Tune-Up to prevent excess carbon buildup on the IAC plunger. In some cases, you'll notice a slightly erratic idle quality. This is the first step in taking care of that problem. IAC = Intake Air Control (Solenoid).
Remove the Air Hat from the Throttle Body
Disconnect the sensor harness from the IAC Solenoid (Rear of Throttle Body)
Remove the two Torx-25 Screws
Remove the IAC Solenoid (Be careful not to lose the rubber O-Ring)
Spray some Carb/TB Cleaner in the IAC port on the Throttle Body and let it sit
Spray some Carb/TB Cleaner on the tip of the IAC Solenoid and wipe clean (Do NOT forcefully twist or push the plunger - You will damage the Solenoid. Wipe very gently.)
Spray a little bit more Carb/TB Cleaner in the IAC port on the Throttle Body and wipe clean with a thin/lint-free rag
Reinstall the IAC Solenoid (Make sure you don't lose the rubber gasket on the solenoid)
Reinstall the sensor connector and airhat
Start the engine and let idle for about 1 minute.
...............................
How to clean your Throttle Body:
Most people think that cleaning the throttle body requires a can of Carb/Throttle Body Cleaner and a quick "wash" of the bores. This may work, but only washes the dirt and cleaner down into your intake manifold where it can puddle up and break down the belly-pan gasket. Then, it also is pulled into the combustion chamber where is can foul up the spark plugs.
The proper way to clean your throttle body is to remove it from the engine (you'll need a small pan, some compressed air, and a new throttle body gasket for this procedure):
1. Remove your air hat from the throttle body
2. Disconnect the sensor connectors (TPS, MAP, and IAC)
3. Remove the four throttle body bolts
4. Lift the throttle body up and away from the intake manifold (place a rag over the manifold opening to prevent anything from falling inside)
5. Remove the three sensors (Do not drop them)
6. Remove the three screws for the throttle linkage (Not required...can be done with linkage attached)
7. Place the throttle body in a small pan and spray Carb/Throttle Body Cleaner in the bores, underside passages, and ports. Let soak for about a minute.
8. Clean the IAC Solenoid - Refer to "How to clean the IAC Solenoid"
9. Spray some more Carb/Throttle Body Cleaner in the bores and ports of the throttle body
10. Wipe clean with a lint free rag (baby diaper works well) and blow out all the ports with some compressed air (a small can from a electronics store works just fine).
11. Reinstall all sensors, then reinstall on your vehicle with a new Throttle Body gasket (don't forget to remove the rag)
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Ratdog
Dodge Dakota
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12/01/2004
23:19:31
| RE: Humming from front end in R trun
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Message:
With regard to the humming... put the front end up in the air and see whether you get any movement from the wheel. Grasp the top and bottom of the tire and push/pull the top/bottom alternately and see if you hear any mechanical movement, feel any movement (other than the flex of the tire's sidewall). You probably need to pull the wheel bearings, inspect them (and the races) for wear... repack the bearings and torque them according to book spec. It should help. Another "symptom" will be a shimmy felt in the steering wheel when the brakes are applied. If that improves things, but doesn't cure it... you may need to replace the bearings/races/seals altogether. I'm fixin' to replace my front pads, rotors (with new races), bearings, seals. My '90 Dakota has 137,000 miles on it. The "repack" helped, but I'm still getting a little "howl" above 65mph from the R/F.
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