No, Mr. Lemmywinks, No!!!
Join Date: Jun 2005
Location: Harriman, TN
The limit of voltage drop on a battery during starting is to about about 8V, depending on what your engine is built to.
A 2V drop while turning the headlights on is a battery problem, not a 2V drop while starting.
I'd buy a rebuild kit for the alternator, and check the rest of the wiring; there's a problem somewhere.
Check the ground side out; I'd bet the heavy wire to the starter is going bad.
Look at the Sticky for the "Big Three" mod.
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
Black '96 Cougar XR-7 (Lazarus) 210k mi PI Intake, '02 4R70W, Jmod, PST DS, GrogTune, Konis, Mark LCA+Poly, racecougar Custom Engine Chain, and JL and racecougar Bracing.
Black '97 Tbird Limited Edition, '02 4R70W, 255 walbro, PST DS, PBR Brakes&SS lines, Toicko Blues & Springs, GrogTune.
I'm not Human enough to be human; but I'm trying to fit in, and I'm learning to fake it.
"Never said Hibbity..." - Brian Williams