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GREG K
Dodge Dakota
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11/03/2005
08:05:11

Subject: unidentified noise
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i have a 92 dak 3.9 when ever i am driving down the road there is a knocking noise underneath it.
at first i thought it was just a lug that had came loose but when i pulled the cap off of the rim all the lugs where on so i dont know what to do or where to start to look for this problem. any know whats wrong



?
Dodge Dakota
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11/03/2005
09:13:29

RE: unidentified noise
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Check driveshaft - does it vibrate at speed ??



this guy
Dodge Dakota
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11/03/2005
11:42:23

RE: unidentified noise
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i have the same noise but it only happens when i apply the breaks and somethigns when i acclaterate, but not all the time when i acclaterate. i cant figure out what it is either i checked lots of thigns and havnt figured it out, my dad works on cars and cant figure out what it is either.



Robert
Dodge Dakota
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11/03/2005
12:34:44

RE: unidentified noise
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I've heard this noise before, it is possible that the catalytic converter is the reason why!
1996-1998 models got out of the factory and problem shows up right around 65,000miles.
If this is the case, the dealer must replace at their cost. The warranty is 80,000 miles or 8 years and is a federal mandatory law that this gets done by the dealer. Any dealer.
Robert
floridabeach8@yahoo.com



Hmmmmmmmm
Dodge Dakota
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11/03/2005
14:18:43

RE: unidentified noise
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you better check your headlight fluid.



eagle85
Dodge Dakota
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11/03/2005
16:58:51

RE: unidentified noise
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I have a '94 3.9 that makes, I think, the same noise. I don't notice it much while driving, but while idling in gear there is a knocking rattle noise coming from underneath. I could not find anything loose anywhere. So I finally put it on ramps, blocked it good, put it in gear and crawled underneath to find the noise. I determined the noise was coming from the catalytic converter. Since I continue to pass emission testing in GA, I have not replaced the converter.
I just put truck into Nuetral when I am idling in a drive through lane.



GREG K
Dodge Dakota
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11/04/2005
08:06:27

RE: unidentified noise
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its only when im driving not when idling
my brother told me it might be a hanger coming loose from my exhaust. he said that if driven hard since your motor pulls on the exhaust it could just be that i have a loose hanger



TimG
Dodge Dakota
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11/04/2005
14:25:06

RE: unidentified noise
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Hold the computer closer to the truck so we can hear it



KRY
Dodge Dakota
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11/06/2005
14:30:04

RE: unidentified noise
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I have a 1990 dakota 3.9 4x4

I am also hearing a few noises coming from the under side. I hear a rattleing when driving at any speed when driving fast i here a more winding/humming sound. I still hear rattling sound if i put it in nuetral at 20 mph and shut off power. I am sure my exhaust needs work but i feer it will cost me greatly to persue the problem. the truck has 160,000 miles on it and probably other problems ... like the idle motor needs to be replaced ... wondering if i should bother to fix it and get a little more out of it , drive it to the ground, give it away , sell if for what ever i can get?



Robert
Dodge Dakota
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11/07/2005
12:11:49

RE: unidentified noise
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I had the winding humming sound, cause the fluid in the rear axle was low and took out 2 bearing.. I have 197,000 miles on this truck.
Should check fluids for that winding humming if it does the same when you take it out of gear.
Mine is the 5 speed and never changed the clutch for I only use the clutch for 1st and reverse.
About passing emission, yes the bad catalytic convertor passed also but had replace for it was under 80,000 and 8 years.
And don't believe that one that said check your headlight fluid, he or she is not being helpful at all. About the idle motor "solenoid" when they go bad the idle on both of mine idles at 1800-2000 rpms when it quit working. I went to pull and save and took one off of a V8 and V6. If the connectors are the same, then they are the same part.
Robert



prodak
Dodge Dakota
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11/07/2005
14:05:31

RE: unidentified noise
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KRY-
Two questions - #1 do you like the truck and #2 is the engine internally sound (good compression on all cylinders, no oil fouled plugs, etc.)?
If the answer to both questions is yes then you should probably repair and keep it. For a few months worth of new truck payments you can probably fix whatever needs fixing, and buying another used truck is no guarantee you won't have to fix a whole new set of problems.
These magnum engines are hard to kill, and you could conceivably get another 100K out of yours.
It is almost always more cost effective to fix what you've got, but again this only applies if you like what you've got.



prodak
Dodge Dakota
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11/07/2005
14:08:29

RE: unidentified noise
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Sorry, shouldn't have said magnum, but my point is still the same.



Robert
Dodge Dakota
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11/07/2005
16:07:39

RE: unidentified noise
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Answers to KRY
Two questions - #1 do you like the truck {Yes I've own as new and they are not easily found for sale in this part of the country.

#2 is the engine internally sound (good compression on all cylinders, no oil fouled plugs, etc.)? I recently had the emissions test done and it kicked me out for burning real clean. 29 seconds is how long they tested this truck. I also believe that this truck will be in good shape when it arrives to 300,000 miles.
This is not the V6 magnum..

Best regards to all always, Robert




GREG K
Dodge Dakota
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11/17/2005
08:01:36

RE: unidentified noise
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i have found out what the unidentified noise was.
the other day i went to go to work and my truck wouldnt start it started fined in the morning and afternoon but that night it wouldnt start. so yesterday i was told it was my starter so i went under my truck and saw that the bar for the automatic tranny to shift gears was off completely
i put it back in place and it started up fined.
the noise was the bar moving around in the hole.



Robert
Dodge Dakota
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11/17/2005
12:53:07

RE: unidentified noise
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I guessed when this bar came lose, that the neutral safety was causing the starter not to engage. That what I know about starters that won't start because of the safety feature.

Robert



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