'05 Dodge Grand Caravan, no pulse on coil negative from wire 3.
shadetreemech9
Member Posts: 2
Hi,
I have an '05 grand caravan(3.8L) with no control pulse on coil negative from wire 3. So I'm thinking have no firing for cylinders 1 & 4. I checked the wire side with spark testor and there is no spark from them. I backprobed the pulse wires to the coil. There is no pulse for wire 3 which feeds middle coil tower(for 1&4) I checked resistance on the wire(K19 according to OEM Service Manual) at the PCM, and it is reading zero(0) for K19(wire 3 into coil). Resistance is fine for other 2 wires also.
What do I do next? Why am I getting no negative pulse to coil on only one wire(but the wire is good.)
And yes, of course the engine light is on. Basic OBDII check suggested misfire on a couple of cylinders. . . I already knew that. It is, of course, running very rough and isn't really driveable(which is doubtless bad for it it in this condition.)
Informed comments and questions greatly appreciated. Thanks!
Comments
Some, elsewhere, are suggesting that it might be a cracked flexplate/flywheel? Does that make any sense? http://www.obd-codes.com/forums/viewtopic.php?f=2&t=3071