Compression Ignition Addict
Join Date: Jul 2009
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What would cause truck to defuel on 310?
So I had the 310 beta tune and it would always just kinda die and totally defuel right before it made either the 3-4 or 4-5 shift. I figured that was just b/c it was a beta tune and brushed it off.
I finally updated to the new firmware and got the 310 tune and loaded up the 310 agressive today. First drive, moderate acceleration (Maybe half throttle at most) and it did the same thing, defueled hard. On the beta I had no problems when the converter was locked or if I babied it, haven't really tried with the release version yet.
I know that if it detects the tranny slipping it'll defuel, but i don't feel like it would slip every single time? Is there anything else that could cause this?
I've also noticed that truck seems to shutter or surge on the 275 also.
08 F250 CC SB - too much to list
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Smokin' Guns Peformance and Accessories
Throttle Junkie Performance Parts
Last edited by O2ShootTheJ; 05-29-2010 at 10:56 AM.