JoshIsLosingIt said:
How involved of a task is it to change the wiring harness? thanks.
I swapped only the 14 way connector on my engine computer. Then I had to open up the ECM and resolder the pins on the circuit board which align with this 14 way connector.
Techs in the past had punctured the wire insulation right next to the connector. Eventually they rotted out, and my 'get me home' fixes, which should have been viewed as a temporary only type of thing, but which became more permanent, consisted of drilling out the back of the connector. Inserting the copper wire through it, and reseating connector with copper wire between pin and socket and use some rtv and zip ties to hold everything in place
This contributed to the breakage of the solder joints on the circuit board.
Opening up and resoldering the 14 pins was actually pretty easy, but I stressed out over it and spent some time trying to find somebody with more soldering experience to do so before saying Eff it, and getting the right tools and doing it myself.
If anyone with this vintage of Dodge van starts getting random stalling, hard restarts, of just very poor driveability which goes away or comes back like a switch was flipped, I'd strongly suspect this connector. Turn the key on and wiggle the connector, and if relays start clicking on and off or the Idle speed motor engages Disconnect battery and pull the connector. Grab the pins on the ECM with some tweezers and wiggle them. Any that move more than 0.5 to 1mm likely have fractured solder joints.
Have a look inside the connector itself. Ugh, can't see anything but what was once clear clean dielectric grease
Use Caig Deoxit d5 or d100 spray to clean all ECM connectors after flushing them of old dielectric grease with any average electronics cleaner. No can of electrical connector cleaner, other than Caig DeOxit does anything to treat the oxidation on the conductive surfaces.
Do it to all the sensor connectors too. It is rather amazing how much crap and black oxidation can come out of what is to be pristine conductive surfaces, even those which were supposed to be protected from the elements by liberal applications of Dielectric grease.
I resoldered my ECM 11 months ago. not a stall or Hiccup since. About 10 months ago I cleaned all my sensor connectors, and every other connector in my Van with the Deoxit products. The 02 sensor, TPS and MAP sensor connectors were very oxidized.
After cleaning, it felt like my Van shed 500 LBs of weight, and MPGS I assumed were lost due to slightly larger heavier tires, came back.
More recently I passed a California Smog test with Much better Numbers than 2 years previous. The Only thing i did which could effect emissions in this time is the ECM and Sensor connectors.
I could have produced 3x as much HC, 5 times as Much NO and 10x as much CO and still have passed the sniffer test.
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Dodges are known for electrical issues. The three products above can solve/prevent most of them with some effort on the part of the owner