astrochimp Posted September 3, 2016 Share Posted September 3, 2016 Next up..time to get rid of this long time issue. I've suspected ground issues for years and currently.. I have the NEW Hei installed and besides the alternator excite problem, I'm seeing- seems to be missing during acceleration tach goes nuts once in awhile and bounces around 4k when idling voltage gauge LOWERS when the engine gets hot (goes from 14 slowly down to 13) Sometimes headlights dim when brakes on or blinker on. I have the wire to the body panel and the wire going to the alternator bracket. and this is the way it's been since i got the car. I'd like to Super Duper ground this vehicle so I know it cannot be the cause of any problems anymore. So i get some ground straps and run them from where to where? Thanks for any INFO!! Quote Link to comment Share on other sites More sharing options...
Ian Posted September 3, 2016 Share Posted September 3, 2016 From the factory there was one from the back of the head on the passengers side to the firewall, it was a braided cable. 1 Quote Link to comment Share on other sites More sharing options...
astrochimp Posted September 3, 2016 Author Share Posted September 3, 2016 ok, i definitely don't have that. Going to add a wire from the head to the firewall and see if i notice anything Quote Link to comment Share on other sites More sharing options...
Ian Posted September 3, 2016 Share Posted September 3, 2016 Make sure you clean / grind and paint or rust off any place you have a ground too Quote Link to comment Share on other sites More sharing options...
Sam (Bones) Posted September 3, 2016 Share Posted September 3, 2016 I know the original ground went to the alt bracket but that can cause a grounding issue rust can form between the bracket and block easily, or if it's freshly painted can cause issues to I like the take the battery ground directly to the block to eliminate any issues there Quote Link to comment Share on other sites More sharing options...
Mo's70MCs Posted September 3, 2016 Share Posted September 3, 2016 If memory serves me right, one of the things that I did to my daily driver (Betsy) was to upgrade on the size of wire, from what I believe was a 10AWG to a 6AWG, the wire that goes from the junction block near the battery to the junction on the fusible link near the voltage regulator, talk about changing the problem all together. I used to have issues with dimming lights when stepping on the brakes, and noticeable on the headlights as well as the dash-lights. It also fixed intermittent starting issues I used to have with it, I believe the engineers at GM had a brain fart along that junction. Not that it needs a 6 gauge wire, but it surely fixed everything in doing so. I never tried an #8 I just went for overkill from the get-go. Quote Link to comment Share on other sites More sharing options...
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