Now I’m overcharging, My car is murdering voltage regulators |
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Now I’m overcharging, My car is murdering voltage regulators |
VaccaRabite |
Sep 18 2018, 12:05 PM
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#1
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En Garde! Group: Admin Posts: 13,444 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
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I’ve been driving my car all over for the past week or so. Last weekend I noted that it was hard to start, and it stalled while pulling away in 1st once. Weird. Didn’t worry about it and finished my drive. Got home and I checked voltage at the battery and I was making 18 volts, my VR had seemed to fail and I was pushing max voltage at the battery. Geeze, no wonder the car was hard to start with the alternator at max effort. So, I’ve done the ground thing and they are all clean and good. In my undercharging thread I ran a 10ga wire from the alternator case to the body ground point near the relay board in the engine bay. I’ve also checked all my collection of voltage regulators and all 5 of them, be they mechanical or solid state are now allowing the alternator to go full bore all the time. This is with both the brand new battery and the PC680 gell cell race battery. What do I look for now? Could I have broken the VRs by pulling them off the running car while chasing issues with the alternator last time? Or is this a car thing and I need to fix something else. The car is essentially acting like I have D+ and DF jumped with D- left empty. Zach |
Peashooter |
Sep 19 2018, 02:08 AM
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#2
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Member Group: Members Posts: 163 Joined: 17-December 11 From: SW Ohio Member No.: 13,903 Region Association: None |
Take off your relay board and take a look at the bottom. On my previous car the board had been repaired after the insulation failed and the repair material was slightly conductive, leading to exactly the same issue you have with overcharging. Good luck!
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VaccaRabite |
Sep 19 2018, 06:20 AM
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#3
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En Garde! Group: Admin Posts: 13,444 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Take off your relay board and take a look at the bottom. On my previous car the board had been repaired after the insulation failed and the repair material was slightly conductive, leading to exactly the same issue you have with overcharging. Good luck! Just put a new relay board in it a few weeks ago while trying to find the cause of the undercharging issues. Part of the reason why this is frustrating is that I have replaced or cleaned every part of the charging system over the past month. *new alternator *new alternator harness *new relay board *several new voltage regulars *cleaned all the engine compartment grounds, and added a heavy ground from alternator case to the chassis. Zach |
Spoke |
Sep 19 2018, 07:30 AM
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#4
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Jerry Group: Members Posts: 6,978 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Take off your relay board and take a look at the bottom. On my previous car the board had been repaired after the insulation failed and the repair material was slightly conductive, leading to exactly the same issue you have with overcharging. Good luck! Just put a new relay board in it a few weeks ago while trying to find the cause of the undercharging issues. Part of the reason why this is frustrating is that I have replaced or cleaned every part of the charging system over the past month. *new alternator *new alternator harness *new relay board *several new voltage regulars *cleaned all the engine compartment grounds, and added a heavy ground from alternator case to the chassis. Zach Keep in mind that you have made progress. Instead of under-charging the system can now charge correctly. Why the VRs aren't behaving is unknown at this time. It's like you've moved the goal posts closer by 10 yards and moved the kicker back by 5 yards. Keep the faith; you'll figure it out eventually. |
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