Well I installed my 3rd Fuddle converter last week and still getting ses codes. I barrowed a buddies scan tool and this is what showed up from the freeze data:
DTC that caused the freeze data=PO300
Throttle position=0.0%
Load value=3.9%
RPM=885
Air flow rate=10.21 GR/SEC
Map sensor=35 KPA
Coolant temp=82º
STFT#1=0.0%
LTFT#1=2.3%
STFT#2=0.0%
LTFT#2=1.5%
STFT#3=50.0%
LTFT#3=-18.8%
STFT#4=57.0%
LTFT#4=-3.4%
Vehicle speed=1 MPH
Fuel system=#1 & #2 open
All of this happened after I installed the Fuddle converter. I'm not saying that it is the converter, but if it's the tune, this ses thing just happened by coincidence after installation??? I started the truck and drove it for awhile and to check fluid levels and ses codes ever since.

What is ya'lls analogy???

James

 

That is very common with with cammed motors. It's a random misfire code. The converter didn't cause that. Your problem is elsewhere.

 

Read this https://ls1tech.com/forums/showthread.php?t=162767

 

My truck isn't cammed. I think it is the less in rotating mass more than anything.

Thanks for the input.

James

 

Very useful thread!!! I was thinking the same thing about the less weight in rortating mass. The engine isn't working as hard anymore with the lighter verter. Allen is going to look into it for me this next week.

Thank you very much!!!

James

 

I had the same issue when I installed the small ART CARR I had, The truck Torque converters are very heavy. Replace them with something a lot lighter, the computer would like to know about it. lol
I beleive I used the 5.3 tables for the 6.0, I can't remeber now.....

 

Well from what I've been told, the computer doesn't know that the verter is lighter or not. It seems that this doesn't matter. All I know is that within 5min of the install, sitting in the drivway idling, the ses codes don't stop.

James

 

How big is your torque converter???
The one i just put in is a 10", i have no problems with misfires..
it freakin revs up faster now!

 

9.5". Mine tooooooo!!!!!

James

 

Your truck is a POS James, I got a couple of old gallons of 93 we can use on it