+1 to the above.
I had a similar problem with the old beater... Darn thing wouldn't start up sometimes, and then other times... bam! No problem.
Turned out that the battery connection just wasn't quite tight enough.
'09 PSM G8 GT - OPG Intake, DOD-Delete w/ Stage 1C 218/229 .600 Lift 117.5LSA, Kooks 1 7/8 Mids, Solo Axle-Back w/ X-Pipe, SuperPro Bushings (Front and Rear). BMR Sway Bars (Red)
"If you want to criticize someone else's work, be sure that your own is in order first."