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Engine troubles, rough Idle and Afterfire Clanking noise too. -- 93 Dakota 3.9L Man

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Old Jul 24, 2025 | 04:20 PM
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Default 93 Dakota 3.9L Manual --Engine troubles, rough Idle and Afterfire Clanking noise too.

As the Title says I have a 1993 Dodge Dakota 3.9L v6 with a manual transmission. Just bought the car a few days ago and have had a few problems.

The truck has run great so far except this started happening yesterday immediately after putting fuel into in it. Check the video linked below:
It is after firing like crazy and it was so bad it blew apart the muffler as seen on the pictures attached




Also where does this hose go and or do it is attached to the top.









I've redone the wiring harness power that was corroded leading to the car cranking but not starting once I had done that it drove great.

The belt was squealing something terrible so i replaced that aswell.

The previous owner said he put a new fuel pump in. Ill attach a picture showing the filter ABOVE ^^ though it looks like it could be replaced.

Any help would be greatly appreciated boys, thank you for your time.
 

Last edited by Krycerick; Jul 24, 2025 at 04:38 PM.
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Old Jul 24, 2025 | 04:52 PM
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How do the ignition parts look? Cap/rotor/plugs??? If this all started after getting gas....... Bad gas?
 
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Old Jul 24, 2025 | 06:04 PM
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Default Spark Plugs and wires

I checked the wires and plugs and to my limited knowledge they do not look terrible.

I did not take apart the Distributor though.



Passenger Side
Passenger Side
Passenger Side
Passenger Side
Passenger Side
Passenger Side
Driver Side
Driver Side
Driver Side back
Driver Side back
Alternate angle
Alternate angle
Top Dis cap
Top Dis cap
Back of cap
Back of cap





 
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Old Jul 24, 2025 | 08:00 PM
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Those guys look a bit worn. Wouldn't hurt to throw some new ones in there. Copper plugs only please, brand of your choice.
 
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Old Jul 24, 2025 | 08:25 PM
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Originally Posted by HeyYou
Those guys look a bit worn. Wouldn't hurt to throw some new ones in there. Copper plugs only please, brand of your choice.
I will go to store tomorrow and Ill give you an update if it helps the issue
 
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Old Jul 24, 2025 | 08:36 PM
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I suspect you have more than one problem going on....... REALLY need to check the cap/rotor as well.
 
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Old Jul 25, 2025 | 12:44 PM
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I am going on vacation in a few days here I shall update once I get back.
 
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Old Aug 4, 2025 | 10:30 AM
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Default I am back from vacation

I am back from my trip and some parts have arrived.
I have replaced :
Spark plugs, and wires
Throttle Position Sensor (TPS)
Idle Air Control (IAC) Valve
Ignition Coil
Distributor Cap and rotar
I will post pictures below of the distributor cap, and a new video of how it runs.
Overall it seems to idle much better but with a little gas it is after-firing terribly still.







Video showing pure idle--------------------------------------------------------------------------------
Cars new Idle
Video showing after-firing when given barely any gas.------------------------------------------------
After-Fire
 
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Old Aug 7, 2025 | 09:19 PM
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Just did a compression test all cylinders are at or over 150psi
 
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Old Aug 14, 2025 | 02:19 PM
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I just got finished doing the timing chain and it was extremely loose,
it most likely jumped a tooth and was out of time. It was a pain in the *** job and I never did anything that intense but I got it torn down put back together
and it is now running well I would say I have to test it a little bit more But I would say problem solved for now : )
 
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