Saturday goal: drive MonZora to monthly open house at the warehouse. To that end, I needed to:
- finish kill switch install
- charge battery
- set delay time on delayed-off relay for header fans
- unplug standard relay, install new relay
- reassemble engine box
- verify it all works as intended.
Finishing kill switch install was easy peasy.
Charging battery was lemon squeezy.
Setting delay time was PITA. it's got a 270° pot with 2 sec min and 180 sec max, but the adjustment is far from linear. Like, MIN plus 45° is about 60 seconds, but MIN plus 90° is about 150 seconds. My goal was 90 seconds, and after about 6 micro-adjustments I settled on 95.
Removing standard relay from socket brought a welcome return to easy peasy. But there was no lemon squeezy in sight for installing the new relay. You see, I used a relay with a different footprint when I cobbled the header fans into the car, because that relay had a mounting tab molded in. Instead of simple plug and play, I had to find a standard-footprint relay socket and pigtail in my stash, then cut out the old and wire in the new. No biggie, 4 wires = 8 strips and crimps, should take 15 minutes or so. But I'm working in a limited access space, on my knees, and can't comfortably get both hands to the wires.
So instead of taking 5 minutes to remove passenger seat and firewall, I motherberkeley this and c-sucker that for 45 minutes halfway laying on my side so I can get both hands into the workspace.
Connect battery and verify power up and shutdown: check. Assemble engine box: check. It's now 1:15AM and I'm a good neighbor, so no test start tonight.
8:15AM, Erik is gonna follow me to the warehouse. Car slow-cranks on lawnmower battery, but it does start so I let it run for a few minutes. Shut her off to check fan delay, all good. Twist key to check restart, grrr click click. OK, swap to car battery. Slow crank but starts, run a few minutes, shut down, fans run about 95-ish seconds, hooray, now moment of truth: grr-rrr-rrr click click. berkeley me. Must be something I changed. So I send Erik on his way as I make a checklist: B+ cable, kill switch, B- attachment to chassis, ALT output wire, no ground cable from engine to chassis (relying on solid motor mounts), no ground cable from B- to engine (because extra 10 feet of cable).
Start with adding ground strap from engine to chassis: no change. OK, not a starter ground issue.
at this point I say berkeley this car, I'm going to the warehouse. Make a few new friends, see some cool stuff:
Get home feeling a bit better about the world, have some lunch, and get back to the garage. Remove kill switch, bolt all cables together: no change. OK, not a kill switch issue.
ALT output wire passed continuity check, Fluke is dead, going to assume not an ALT wire issue.
B+ cable is friggin' huge, with a copper terminal and good crimp and solder, so I'm willing to say that's not it. Which leaves me with either the starter or the battery E36 M3ting the bed. So I check the starter: securely mounted, connections are tight. Plus it's a Bosch part and is less than a year old.
so I hit up Batteries Plus for a new Duracell Ultra, and goddamn it's like the car's got a new battery or something! It lights off quicker than it ever has in my ownership.
so I shut it off and let the header fans run til they time out, twist the key, and...
...
it barks to life like it's got a new battery. 🤘🏻😎
I repeat this cycle a few times until I'm pretty satisfied that I've solved this problem. So today I'm parking her outside and cleaning the garage, then taking her to the gas station, then driving and collecting data and tweaking VE table and making a mount for the tablet and getting back to the list: