1993 Dodge Caravan can fried coil fry computer?

SBERTILSON

MEMBER
1993 DODGE CARAVAN
6 CYL
2WD
AUTOMATIC
225,000 MILES

One of the 3 coils on my 3.3L fried (, cracked, and oozed) and now that I've replaced it, the 2 cylinders off that section of the coil still get no spark even though the other 4 do. I tried resetting the computer by disconnecting the battery for an hour or so, but I still see codes (via check engine light), so I don't know if they just came back or if they never cleared. I don't have access to a code tool.

1 Reply

BMRFIXIT

MECHANIC
19,053 POSTS

Check if the drive wire flashes when cranking if not check wiring back to the PCM
if wiring OK suspect bad PCM
here is the general coil test on 3.3

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need manual CHECK IT @
https://www.2carpros.com/kpages/auto_repair_manuals.htm

3.3L
Ensure sufficient battery voltage (12.4 volts) is available to operate cranking and ignition systems. Disconnect wiring connector from coil pack. Connect a test light between B+ coil pack wiring connector terminal (Dark Green/Black wire) and ground. See Fig
Turn ignition switch to ON position. DO NOT return ignition switch to OFF position. If test light flashes momentarily, PCM energizes ASD relay, go to next step. If test light does not flash, ASD relay did not energize, Crank engine for 5 seconds. If test light momentarily flashes during cranking, engine controller is not receiving signal. If test light does not flash, unplug camshaft sensor connector.
Turn ignition switch to OFF position, then to ON position. Wait for test light to momentarily flash once then crank engine. If test light flashes once again, replace shorted camshaft sensor. If test light does not flash, PERFORMANCE Section to check crankshaft sensor/camshaft sensor 8-volt supply or crankshaft sensor 5-volt output to ground circuits.