Tuning for a Yank SS4000
Thread Starter
TECH Apprentice
Joined: Nov 2001
Posts: 376
Likes: 3
From: Gary, In
Tuning for a Yank SS4000 Can someone look over my currant tune and give me some advice on tuning for my new converter? I had the Midwest 3200 in it and had lockup issues periodically but now it has gotten very bad with sudden locking going into 4th gear sometimes under light throttle and all of a sudden unlocking on the highway for no apparent reason only to lockup again a minute later. Only thing I've messed with is part throttle shift points as it shifts way too early for me. Attached is my original dyno tune before I messed with the shift points. TIA!
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Joined: Aug 2010
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From: Ann Arbor, MI
This is a well know problem related to high stall converters triggering misfile detection.
I would start by disabling P0300 "Random misfire detected" and significantly increasing the non-32,767 values in the Engine Diag -> Misfile ->Medium RPM tables. There are two tables, one under Revolution Mode and one under Cylinder mode. Looking at another post, it was suggested to double the non-32,767 values under Cylinder mode; if that isn't enough do the same to the other table.
I would start by disabling P0300 "Random misfire detected" and significantly increasing the non-32,767 values in the Engine Diag -> Misfile ->Medium RPM tables. There are two tables, one under Revolution Mode and one under Cylinder mode. Looking at another post, it was suggested to double the non-32,767 values under Cylinder mode; if that isn't enough do the same to the other table.
Thread Starter
TECH Apprentice
Joined: Nov 2001
Posts: 376
Likes: 3
From: Gary, In
This is a well know problem related to high stall converters triggering misfile detection.
I would start by disabling P0300 "Random misfire detected" and significantly increasing the non-32,767 values in the Engine Diag -> Misfile ->Medium RPM tables. There are two tables, one under Revolution Mode and one under Cylinder mode. Looking at another post, it was suggested to double the non-32,767 values under Cylinder mode; if that isn't enough do the same to the other table.
I would start by disabling P0300 "Random misfire detected" and significantly increasing the non-32,767 values in the Engine Diag -> Misfile ->Medium RPM tables. There are two tables, one under Revolution Mode and one under Cylinder mode. Looking at another post, it was suggested to double the non-32,767 values under Cylinder mode; if that isn't enough do the same to the other table.
