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So you cleared the codes and then checked? Myself, I would have checked the codes, written them down, and then cleared them to see what came back...

P1684 is just a 'heads up' that the battery was disconnected. It does not set a [CEL]

Do you have a [CEL] "check engine light" currently illuminated?

That sucks that it didn't code. Kinda tough to xshoot from my armchair without having the codes or having the van in my driveway/shop.
 

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I still do not know year make model mileage
do not know why you did a tune up
if your injector harness was already melted and previously repaired
if the CEL was illuminated prior to the 'tune up'
If a shop did this 'tune up' or if it was DIY by you
 

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2002 Town And Country LX with 99,900 miles. The reason for the tuneup was while driving to NYC got a check engine light for cyl #5 misfire so instead of chasing the exact reason for the misfire I just changed all parts that could/would be involved in a misfire like any normal person would do.
 

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And no it was never repaired when removed original fabric tape was on it now thinking it maybe the part of the wire before the connector underneath the cross pipe for exhaust looks like tape maybe open.
 

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Which engine?
Flex fuel?
All wheel drive?
 

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In the vicinity of the cross over pipe is where the injector harness melt down occurs. In later years, after this be came an issue, Mopar moved the wiring away from the crossover pipe.
 

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Any chance you got the ignition wires on wrong?
59461



NOTE:
While the front three wires go 1:1 left to right across the front of the engine, that the three in the back are shuffled.'

Verify that the three wires in the back are going to the correct cylinders as pictured above.
There is also (usually) the cylinder number is embossed on the coil body for each of the high voltage post.

Please let us know when you finally get your vehicle repaired. I can't wait to hear that you got her running and what it was.
Cheers!
 

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Yeah, roger that, I forgot.

It was running good, then it suddenly picked up a misfire.
You did the tune-up and it ran good again for five days and then jumped back to the misfire...
sorry
 

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To FabricGATOR do you think it might be my o2 sensor causing symptoms I’m getting was searching to see what the o2 sensor you can see in the engine bay does?
 

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there is another thread going on called
06 3.3 misfire
Neil is in Panama and his is similar in nature to your situation.

The other guys are not jumping in here with suggestions, likely because you revived an old thread, and like me, they are not going to read all 14 pages to know what you already read about....

FROM THAT THREAD: atoman said (and he is a good one to listen too)
Will it misfire as before if you unplug the front O2 sensor? (and cause it to run "open loop" - pre-set fuel map instead of rich/lean feedback from sensor)
So try to disconnect (temporarily for testing only) the upstream o2 sensor and see if it makes a difference in how it runs.

Myself, I am not sure what a smooth running in 'OpenLoop' would point to, but read that thread and learn where it is going.
 

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Update I took my van to the mechanic and he put the noid test light on the injector harness where the problem. In fact he said as I was cranking the engine he could see the other injectors spraying but not number 3. It is confirmed by the mechanic that I have a bad ground on injector 3 causing it to not receive pulse. So if anyone knows where I could find an injector harness cheap please pm me with info.
 
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