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Bob Lincoln
Dodge Dakota
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6/27/2007
08:47:36
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 Subject: RE: 3.9 engine rattle
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Message:
"guys, i don't think it's his timing chain or his a/c comp. if you read his 3rd to last post he says he put 91 octane and the noise stopped. that would indicate pinging." Yup, I believe I said that at least 3 times. And if it is pinging that stops with higher octane gas, yes, you will get better gas mileage using the fuel that doesn't ping. But you have an underlying problem that hasn't been found yet. It should not need 91 octane. Mine runs fine on 87 with the highest summer temperatures and loads.
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aLLsHAVED
Dodge Dakota
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7/01/2007
03:52:23
| RE: 3.9 engine rattle
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Message:
You're right Bob, "It should not need 91 octane" but if this is the case I shouldn't need colder plugs either; I'm pretty sure plugs from the dealer were used when I did the tune-up last August. Everyone seems to be taking guesses, but no one sounds sure. I don't want to rack up a huge bill following guesses, what would you do??
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goober
Dodge Dakota
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7/01/2007
08:01:15
| RE: 3.9 engine rattle
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Message:
i would challenge hulk hogan to a world championship match and see if tyhat fixes it
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Alec
Dodge Dakota
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7/02/2007
23:21:03
| RE: 3.9 engine rattle
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Message:
Since you bought it used, maybe the previous owner had a superchip or reprogrammed the computer. I have a 2000 3.9L, and I get that same pinging sound when I accidently put 87 in. Of course, It goes away when a higher octane gas is used.
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Gears
Dodge Dakota
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7/03/2007
21:57:04
| RE: 3.9 engine rattle
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Message:
The answer to the problem is likely to be
the belly pan gasket on the intake manifold.
It's a common problem with Magnum motors.
There that's my 2 cents
..........................Gears
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robert
Dodge Dakota
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7/03/2007
22:03:54
| RE: 3.9 engine rattle
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Message:
Also you could have carbon buildup on your valves and/or pistons....which will cause detonation...
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Matt
Dodge Dakota
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6/15/2013
03:28:26
| RE: 3.9 engine sounds like a diesel on acceleratio
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Message:
The engine in my 90 dodge dakota 3.9 just started sounding
like a diesel on acceleration.??? Has new timing chain and
gears. Water pump head gaskets. And a full tune up. Also I put
new fuel pump and filter. Any suggestions would help?
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daddio
Dodge Dakota
JOIN HERE
6/15/2013
08:53:08
| RE: 3.9 engine rattle
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Message:
Sounds like your base timing is off. Put a timing light on to
check. Also what is the engine temp after it is warmed up?
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Goober
Dodge Dakota
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7/28/2013
19:32:40
| RE: 3.9 engine rattle
IP: Logged
Message:
I am the real Slim Goober yall!
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MH
Dodge Dakota
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8/02/2013
17:04:55
| RE: 3.9 engine rattle
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Message:
Your engine is shot, replace as soon as possible.
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Goober
Dodge Dakota
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9/22/2013
21:26:43
| RE: 3.9 engine rattle
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Message:
I LOVE MY JOB at PEPSIMIDAMERICA!!!
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bobby
Dodge Dakota
JOIN HERE
9/24/2013
20:55:53
| RE: 3.9 engine rattle
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Message:
Really? please tell me more of your amazing story
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Blackout001
Dodge Dakota
JOIN HERE
10/13/2013
22:37:26
| RE: 3.9 engine rattle
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Message:
I have a 2003 Dakota 3.9l. I notice a knocking sound coming from the front of my engine on cold startup. I do not hear it after it fully warms up. What could it be? I have about 60,000 miles on it and just had a tuneup done but the knock is still there when cold. engine seems to run good otherwise. I am the second owner and don't know if the previous owner messed with timing or programming of the ecm. I'm guessing its all factory set due to the plugs and distributor cap being original before performing the tune up.
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