Duramax Diesels Forum Truck of the Week
Old 08-25-2019, 09:04 AM
DAVe3283's Avatar
DAVe3283 DAVe3283 is online now
Heavy & Slow

Join Date: Sep 2009
Location: Boise, ID, USA
Posts: 3,240


The scale is different between those two screenshots, so they aren't as drastically different as they initially appear.

I'd really like to see what the pulsewidth is on both tunes. It appears the 2nd tune does ramp main fuel rate much more quickly, which probably is why it is hard to drive at light throttle.

From what little I can see on those screenshots, it seems you probably just need the truck retuned to match your expectations and driving style. Without the actual rail pressure to compare to the desired, it is hard to evaluate how well the fuel system is functioning.

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Old 08-26-2019, 12:46 PM
max57's Avatar
max57 max57 is offline
Join Date: Dec 2014
Location: Upstate, NY
Posts: 109


Josh you must have a 4l85E in Van , what make and model TORQUE CONVERTOR? LOCKUP WHILE YOU ARE RACING?

Last edited by TheBac; 08-26-2019 at 05:27 PM. Reason: repaired quote
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