Engine Running a 3.3L on a 3.8L ecm - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
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post #1 of 2 Old 06-20-2019, 10:17 AM Thread Starter
CoupleOvans
 
Join Date: Nov 2011
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Running a 3.3L on a 3.8L ecm

So my 3.8L blew (random oil dump while driving) and I swapped in a low mileage 3.3L in it's place.
But I've been finding the 3.3L seems extremely sluggish compared to the 3.8L. This got me thinking about some reasons. Could this be a tuning issue due to the ecm?
I know the 3.3/3.8 run different ecms judging by part number, so would running a 3.8 ecm on a 3.3 make it sluggish?
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post #2 of 2 Old 06-24-2019, 05:32 PM Thread Starter
CoupleOvans
 
Join Date: Nov 2011
Location: Wisconsin
 
My Ride: 94 Voyager
Engine: 3.8L
Induct: N/A
1/4: 0.000

Posts: 1,678
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Re: Running a 3.3L on a 3.8L ecm

Found some things out.

1. My new 3.3l is a 1992, meaning it's the lowest powered 3.3 produced, due to a different intake design.
2. If 3.3s are like 3.0s, this engine would have also had different injectors.

In theory, this engine shouldn't even be running right now.....
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