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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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23,861 Posts
Welcome to Allpar. I have worked on Aeromates in the shop. A local Dodge dealer sold them and I went to look at them and picked up a sales brochure. Great utility vehicle for an all-weather mobile standing-up shop in the back with a work bench.
The engine wiring harness was problematic on the ones that I serviced. The EFI system, coil pack and PCM are Chrysler components but the wire colors may not jibe with a Chrysler minivan service manual. Still, diagnosis would follow the same steps and component pin-outs would be the same.
I would start with getting an older (1991) minivan service manual and possibly the 1991 3.3L/3.8L Powertrain Diagnostic Procedures handbook. This will save you frustration, time and money. It will become your favorite tool besides your multimeter and test light. It may pay for itself in this repair alone.
I have doubts that the flexplate or timing chain is the problem and you might want to re-visit the coil-to-PCM wiring. It is one 'power in' wire (DG/Or?) and 3 out to the PCM for switching to ground to fire the plugs.
Those 3 may pass though an intermediate connector on their way to the PCM. Check connectors for damage, corrosion or push-outs.
A 'T' pin slid into the connector cavity next to the terminal is a better continuity test point than poking holes in wires.
Have you been able to get fault codes from the 'ck eng' light or scan tool? Any P0351 through P0353?
With the crank sensor out and a helper rotating the crankshaft bolt, watch the 'windows' passing under the hole for damage. By slightly 'rocking' the crank CW and CCW, do you see or hear any play in the flexplate?
Is it the same coil in the coil pack that is able to consistently fire every time?
Is your scan tool able to display cam/crank sync?
 

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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
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23,861 Posts
I see that fault code 43 is for the coil primaries #1, #2 and/or #3.
Diagnosis is the same for all 3, there are just 3 different return wires to the PCM for each one.
Is this code 43 present when you extract them? Any other fault codes?
It should be a 4-wire plug into the coil pack. One DG/Or power in and Coil #1, #2 and #3 out to the PCM for sequential switching to ground. I don't think that the TCM would affect a partial coil operation issue.
Is it possible that some flexplate shutter windows got bent while maneuvering the torque converter up into position to be bolted in? I have seen this happen. (P.S.- I was able to straighten it).
 
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