hulm333 Posted November 16, 2009 Report Share Posted November 16, 2009 doin some tuning w a buddy of mine semi amatuer at the efi live, tryin to clean up the dead spot on wide open throttle from 0-20 roughly. seems as when you hit the gas from 1700 rpm to 2300 rpm it has no grunt per say "dead spot". have removed torque management, and most of the disablers like traction control... any ideas what to do to clean it up? also seems as if the throttle position only opens to 83% at wide open throttle at all speeds i would think it should 100% at some time but looking for some pointers there. timing seems to be at 20 degrees advanced between 1700-2300 rpm. any ideas thoughts appreciated thanks Quote Link to comment Share on other sites More sharing options...
Wheatley Posted November 16, 2009 Report Share Posted November 16, 2009 (edited) If you log the ETC or Pedal PIDs you will see they go to 100%.This is overlooked by most!! GM interprets the SAE TPS PID as absolute voltage % Hope this helps Edited November 16, 2009 by Wheatley (see edit history) Quote Link to comment Share on other sites More sharing options...
chpspecial Posted November 17, 2009 Report Share Posted November 17, 2009 (edited) the dead spot is usually from PE delay... check it out and bring it to 0 and don't forget to look at the PE enebalers Edited November 17, 2009 by chpspecial (see edit history) Quote Link to comment Share on other sites More sharing options...
hulm333 Posted November 17, 2009 Author Report Share Posted November 17, 2009 If you log the ETC or Pedal PIDs you will see they go to 100%.This is overlooked by most!!GM interprets the SAE TPS PID as absolute voltage % Hope this helps yes that was the case with the throttle position. what do ya think on the dead spot off the line...? sounds pretty typical of factory tuning?? Quote Link to comment Share on other sites More sharing options...
Wheatley Posted November 17, 2009 Report Share Posted November 17, 2009 yes that was the case with the throttle position. what do ya think on the dead spot off the line...? sounds pretty typical of factory tuning?? yes they lack off the line very bad in stock form with stock tuning. Tuning will help this,but of course it is not going to pull like a freight train with just tuning done only. It will definatly help What year is the truck and what engine? Quote Link to comment Share on other sites More sharing options...
hulm333 Posted November 19, 2009 Author Report Share Posted November 19, 2009 yes they lack off the line very bad in stock form with stock tuning.Tuning will help this,but of course it is not going to pull like a freight train with just tuning done only. It will definatly help What year is the truck and what engine? it is a 2008 silverado crew cab 4x4 3.73 gears. 5.3 flex. exhaust is only mod. Quote Link to comment Share on other sites More sharing options...
hulm333 Posted December 6, 2009 Author Report Share Posted December 6, 2009 yes they lack off the line very bad in stock form with stock tuning.Tuning will help this,but of course it is not going to pull like a freight train with just tuning done only. It will definatly help What year is the truck and what engine? any other ideas? does pe mode even activated in the 07 up silverado?? changed up all the enablers and got aggressive with the pe mode parameters and doesnt seem to be doing anything??? Quote Link to comment Share on other sites More sharing options...
zippy Posted December 7, 2009 Report Share Posted December 7, 2009 Power enrichment is inconsistant and can have a terrible delay in the new trucks. Somewhere around here there is some info on it. Set the delay's to zero if you want to make sure it works right every time. Quote Link to comment Share on other sites More sharing options...
hulm333 Posted December 7, 2009 Author Report Share Posted December 7, 2009 Power enrichment is inconsistant and can have a terrible delay in the new trucks. Somewhere around here there is some info on it. Set the delay's to zero if you want to make sure it works right every time. is there some hidden ones on the E38?? where should i set the map threshold? its at 15 kpa right now Quote Link to comment Share on other sites More sharing options...
zippy Posted December 8, 2009 Report Share Posted December 8, 2009 Set it to zero. Read this. Link Quote Link to comment Share on other sites More sharing options...
hulm333 Posted December 9, 2009 Author Report Share Posted December 9, 2009 Set it to zero. Read this. Link gotcha i will do that! thank you for finding that. Quote Link to comment Share on other sites More sharing options...
hulm333 Posted December 10, 2009 Author Report Share Posted December 10, 2009 Set it to zero. Read this. Link also can i ask ya do ya think thats where a guy is gonna get rid of that lag off the line on this 08?? Quote Link to comment Share on other sites More sharing options...
zippy Posted December 20, 2009 Report Share Posted December 20, 2009 That is one of the key things to getting rid of the lag. You'll have your work cut out for you in tuning an 08' since there is quite a bit of work in getting it all tuned correctly with all of the new tables. If you use it all to your advantage there is alot to be gained with the E38 pcm trucks. If you do much work to it though do at least a servo upgrade if not a full shift kit to help the trans live. They are setup to shift very soft and smooth which is why there is so much torque management in them. Get rid of the upshift torque management and get rid of the smooth as glass shift. Quote Link to comment Share on other sites More sharing options...
hulm333 Posted December 21, 2009 Author Report Share Posted December 21, 2009 That is one of the key things to getting rid of the lag. You'll have your work cut out for you in tuning an 08' since there is quite a bit of work in getting it all tuned correctly with all of the new tables. If you use it all to your advantage there is alot to be gained with the E38 pcm trucks. If you do much work to it though do at least a servo upgrade if not a full shift kit to help the trans live. They are setup to shift very soft and smooth which is why there is so much torque management in them. Get rid of the upshift torque management and get rid of the smooth as glass shift. ya know whats weird is the damn thing shifts super hard in first and 2to 3 sometimes almost seems as if it slips sometimes... and tq management is pulled out of it, even when it was completely stock it was that way. any ideas on that ? im sure we can prolly tune it to make it work right but just wonderin if maybe that means somethin if its stock and acting that way. Quote Link to comment Share on other sites More sharing options...
hulm333 Posted December 23, 2009 Author Report Share Posted December 23, 2009 That is one of the key things to getting rid of the lag. You'll have your work cut out for you in tuning an 08' since there is quite a bit of work in getting it all tuned correctly with all of the new tables. If you use it all to your advantage there is alot to be gained with the E38 pcm trucks. If you do much work to it though do at least a servo upgrade if not a full shift kit to help the trans live. They are setup to shift very soft and smooth which is why there is so much torque management in them. Get rid of the upshift torque management and get rid of the smooth as glass shift. zeroed out all those parameters and still nothing out of pe mode???? Quote Link to comment Share on other sites More sharing options...
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