Need some opinions on this. I just put headers and exhaust on my GXP. When I drive down the road at random times my DIC comes up saying charge system failure and I notice my volts will go up to 16 and then they come back down to 14. Had the alternator checked while in the car and came up good. Any idea's or help would be appreciated.
overvoltage could be battery or more likely a diode bridge going bad in the alternator. Anyone measure underhood temps with he headers vs. Stock? The stock manifolds keep the engine bay pretty hot to begin with, perhaps the headers raise it enough to start cooking the alternator or maybe damage wiring that is too close (are the heat shields put back on?) either of those problems would likely not show up when they are cooler, like in a test right after start up or on a bench.
"Fear is a feeling, not a barrier." -me, 1998.
2006 Impy SS, LS4 transportation appliance 100K (Ultra-flo's, spacer, CQL rockers, DRB, etc).
1996 Fleetwood Brougham LT1 101K.
1995 Caprice 9c1 LT1, 238K (in more than one piece and being parted out)
1985 Honda VF1100S, for those days when you just have to crank off an 11 second quarter-mile. 22K
ok I think I figured it out. Put a new alt on the car and that didn't work. So I am in the car reving and am pissed off about spending 300 bucks on a bat and alt and nothing working. Then the warning flashed again and I looked at the temp gauge and thought it was running hot and it dawned on me to check my fans. Sure enough they were not working so I am assuming when the computer tells the fans to kick on its making more power to turn them on and then they don't come on and that whats giving me an overcharge spike.
Is this a dumb thought?