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I have a 1997 Dodge Intrepid with the 3.5L V6. It is running very rough, and has a persistent P0353 code -- Ignition Coil #3 Primary circuit. I have the service manual and followed their troubleshooting chart, to no avail. I replaced plugs and wires, then the coil pack, then the PCM. The new PCM runs clean of codes for about 15-20 seconds, then lights up with just P0353. I discovered and repaired numerous vacuum leaks. Fuel pressure is fine; and I replaced the fuel filter just in case. All the injectors have the same resistance within .3ohm (13.2+.1-.2). I have the coil pack connector pulled apart, and when I touch the multimeter to the #1 cylinder pin, the car hesitates, sometimes dying. Wiggling this wire sometimes also causes the car to die. However, the car starts and runs just fine (on 4 or fewer cylinders) with this wire de-pinned. I've got great continuity between the PCM and all the driver pins, and wiggling the wires, connectors, pins, harness, etc, doesn't cause any hiccups in resistance. I've got a solid 0.1 ohm on the ground pin. I'm completely at a loss as to what to do next, if anything. Normally, I wouldn't mind taking a bit of time with this, but now I need the car to get to and from work (25 miles of interstate one-way) and would prefer the thing not to die on me, or explode, or anything like that.
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Jun 6, 2016 02:00
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| # ? Apr 27, 2024 06:09 |
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So you post about all these things that happen yet you haven't checked the wiring for that coil. Its not hard to do and you sound like your putting the vag on a pedestal. When often the easy answer is the correct answer. Check the wiring for that coil. It obviously the problem. Also get rid of that terrible car before the head gasket takes a dump.
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Jun 6, 2016 02:29
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SouthsideSaint posted:So you post about all these things that happen yet you haven't checked the wiring for that coil. Its not hard to do and you sound like your putting the vag on a pedestal. When often the easy answer is the correct answer. Check the wiring for that coil. It obviously the problem. Also get rid of that terrible car before the head gasket takes a dump. It's a coil pack/ignition module. There is one four-pin connector from the PCM and six spark plug outputs. I have two new-from-Autozone units that both perform identically. How would I test that coil alone?
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Jun 6, 2016 02:36
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Yeah you need to test te h wires that are going to the coil it's self. Its been a few years since I wrenched on one of these poo poo boxes but just YouTube a how to on coil testing.
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Jun 6, 2016 03:49
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Pull the engine harness connector apart *passenger firewall area* and clean it. Unfortunately my 95 fsm wont be any help. Ill see if I can find a 97 copy for ya. try swapping the 1st pack driver pin to the 2nd pack *moving appropriate spark plug wires* and see if the hesitation moves. I would also check the pin at the pcm connector for the coil connectors. If they are fine then I'd run a jumper wire to bypass the 1st coil wire that's in the harness.
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Jun 6, 2016 04:02
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I pulled the harness apart and cleaned it. Same code. I depinned the coil pack connector and swapped #1 and #3 drivers, and the plug wires (3/6, 1/4), and the code went away. I swapped everything back, and the code is still gone. I drove it around for an hour, doing ridiculous things, driving through water, over bumps, high RPM, low RPM, cruise control, a/c on/off, heat on/off, defrost on/off. Code still gone. No clue what fixed it, but I'm glad it's fixed.
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Jun 8, 2016 02:32
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My 95 Intrepid self repairs all the time. I think its part christine.
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Jun 8, 2016 03:17
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| # ? Apr 27, 2024 06:09 |
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I was having nonsensical electrical gremlins due to dirty fuse contacts not that long ago. Stuff that just didn't make sense. It's really likely that pulling everything apart knocked loose some corrosion or dirt from the connectors.
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Jun 8, 2016 03:35
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