BlackBetty2010 Posted June 29, 2015 Report Share Posted June 29, 2015 (edited) 2010 5.4 Kenne bell 3.6, American racing headers, borla exhaust, id725 injectors, efi dyno tune only 5400 miles on it. It has been running amazing but last night it started popping under full boost. Sort of spit and sputter on hear it out of the exhaust. Could it be knock from bad gas? Thank you for the help. I tried to search the problem but couldn't find any answers. Edited June 29, 2015 by BlackBetty2010 Quote Link to comment Share on other sites More sharing options...
David Hawkins Posted June 29, 2015 Report Share Posted June 29, 2015 (edited) Knock from Bad Gas, Dirt in an Injector or in the Mass Air Screen, ........try putting SEAFOAM in the Gas Tank. Edited June 29, 2015 by tesgt350 Quote Link to comment Share on other sites More sharing options...
twobjshelbys Posted June 29, 2015 Report Share Posted June 29, 2015 Duplicate topic. Sounds like backfire, running rich. Check tune. Quote Link to comment Share on other sites More sharing options...
BlackBetty2010 Posted June 29, 2015 Author Report Share Posted June 29, 2015 Yes sorry I did see the other forum area till I after this one I can delete if needed Quote Link to comment Share on other sites More sharing options...
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