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97Formula · 11-23-2014, 07:15 PM

Does anyone know what the "pop" noise is after I turn the key? I hear it right after the fuel pump prime on a cold engine (when I turn the key to ON position but don't start engine).

Wondering if that's related to my strange cold startup (I don't hear the pop on a warm engine). Although today I did hear the AIR pump kick in after starting a warm engine (no rpm drop however)...

11-23-2014, 07:15 PM	#9
97Formula Join Date: Jun 2006 Posts: 182 iTrader: (0)	Does anyone know what the "pop" noise is after I turn the key? I hear it right after the fuel pump prime on a cold engine (when I turn the key to ON position but don't start engine). Wondering if that's related to my strange cold startup (I don't hear the pop on a warm engine). Although today I did hear the AIR pump kick in after starting a warm engine (no rpm drop however)... __________________ Click here for my vBGarage! Moroso CAI, Hypertech air charger, HPP+ w/160* powerstat, 1LE elbow, Relocated IAT sensor, Spintech muffler, Hotchkis chrome strut tower brace Last edited by 97Formula; 11-23-2014 at 07:16 PM.