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Discussion Starter · #1 ·
Recently finished a 5.2L V8 swap into a 1999 Dakota V6 5spd 4x4.

Under heavy acceleration/load it bogs badly from 2k to about 3.5k rpm, although intermittently it doesn't bog at all. If I accelerate at less than half throttle there's no bog, but abruptly bogs when I go past half throttle.
At the time of the swap I replaced the distributor rotor/cap, wires and plugs.

Using a cheap bluetooth OBD dongle and my cellphone I logged my commute over several days.
When it bogs, there doesn't appear to be any unusual readings from the MAP, TPS or O2 sensors but the timing advance drops to 0 during the bogging.

Any suggestions would be greatly appreciated.
 

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Discussion Starter · #2 ·
Solved the issue when I finally found a MT PCM to replace the AT PCM. I assume the AT PCM was cutting power at expected shift points by retarding the ignition.

The AT PCM had noticeably more top-end, I assume that's related to the earlier version of "software update"? AD on the AT vs AE on the MT.
 

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Hi Billups:
Welcome to DDN. I'm glad you got this figured out. I would not have thought about a different PCM for manual vs auto. We don't have many folks here doing such swaps on their Durangos. What you say makes sense.

Don
 
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