Timing drops very low when trying to launch??
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Teching In
Joined: May 2020
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Timing drops very low when trying to launch?? I recently finished my project its a 2001 gmc sierra 1500 4x4 with a 5.3, 4l80e, single 7875. torque converter is a circle d pro series 3200 stall. the issue im having is when i went out and did some driving and datalogging i tried doing a 4x4 launch but as the rpms started to rise and boost got to around 5-6psi timing was dropping off almost to nothing, rpm got to around 2700rpm and wouldnt go higher and when i let off the brake it was an absolute slouch. i didn't really stay in it long enough for the timing to get back up and start pulling hard. what could cause this? Normal driving and wot pulls the truck runs perfect. ill put my tune and datalog in maybe its something obvious idk. Thanks for any help!
Last edited by revrentzero; May 28, 2020 at 02:53 AM.
