PDA

View Full Version : barely running after calibration only flash



PSI
October 6th, 2017, 11:32 AM
Hi , its a lq4 6.0 with ls3 heads, intake , 42 lb ls3 injectors, throttle body, ls1b controller, return style fuel system . I am running a 3bar COS , its a N/A setup . Everything was running good , I was dialing in the VE . Went for a drive , pulled over did a calibration only flash . It barely started , idles really rough for 10 secs and dies. Did a full flash no luck . Fuel pressure is good , everything checks out ok . Don't know where to go from here . I am attaching my file , any help would be appreciated .

joecar
October 6th, 2017, 12:55 PM
Post the previous running ctz.

joecar
October 6th, 2017, 12:58 PM
Try doing another cal flash.

joecar
October 6th, 2017, 01:02 PM
Also, side note (after you get it running):
- if you're running boost, you have too much HO spark timing.
- you have insufficient PE fuel (even for NA)...!!!

PSI
October 6th, 2017, 02:48 PM
Thanks for the reply joecar . Its the fuel pump or the regulator most probably the pump :( . Hooked up a gauge goes to 55 psi and then settles at 20 psi weird . Its a new walbro 255 pump with maybe 8 hours on it . Was a coincidence that it went out right after I flashed the computer . Not running boost hence the high timing . Thanks for looking through the tune , I will definitely bump up the PE values .