AdsoYo

I installed the Racetronix fuel pump wire harness to rule out the pump not getting enough juice. After an hour of stop and go driving in 90 degree weather, it ran great. Once I turn on the A/C, it will have an intermittent issue where it will idle and run fine, then every minute or so I'll hear the fans click on (even though they should be on already correct?) and my O2 millivolts will bottom out in both banks to about 50. Idle gets rough but after a few seconds it's all good again.

I'm going to replace the big 3 (Battery to chassis, battery to alt, block to chassis) with some 0 or 2 gauge and see if that solves anything. I also want to make sure I have a 140 amp alternator. I was thinking about going even more powerful, like a 160 or 200. Anyone have any recommendations as far as where to buy a new alternator with higher amperage?

As a side note, I started a thread in March that asks about the same issue but I forgot about this thread. Here's the link to new one: https://www.camaroz28.com/forums/lt1...ng-out-855619/ I'm going to continue with this one.

siguy

ok at this point have you looked into the alternator to see if this could be the strange voltage issues you are having?

AdsoYo

Alternator is next on the list. I inspected it to see exactly what it was since I forgot and it's a re-manufactured Delco unit by Autolite, 120 amps. I wouldn't mind having a brand new 140 or 160 amp unit just for peace of mind.

I replaced alt-battery, chassis-battery, block-battery, block-chassis with wires ranging from 4 to 0 gauge. My volt reading is a whole volt higher than what it has been and it's more stable. Volts used to start out around 13.5 but would gradually drop to about 12.7 the longer I drove. I would also see the dash gauge tick with the blinker. Now volts are a steady 13.7. They did drop to 13.4 by the end of my 20 minute drive though.

AdsoYo

So it's been almost a year since I posted here and I just wanted to put an update in the books. I have replaced the pump with a brand new Walbro and replaced the sending unit (gas gauge didn't work). I haven't driven it much yet since the install, but will post here how everything is working. The real test will be once the weather heats up in the middle of summer.

Scrub88

I'm curious to about the warm weather test ..