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  1. V

    87 5th ave 4 speed conversion

    I'm getting ready to pull the 76 Aspen and the 87 5th ave in the garage and start swapping parts to make the 5th ave a 4 speed. I have a good idea about what I need for the swap but I'm open to suggestions. The carpet is a question for sure. The Aspen carpet is in great condition but I'm...
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    Light throttle ping from stoplight on hot days

    Things are looking up. Fingers crossed I've resolved a couple of issues this past couple weeks. The vacuum cap that was leaking fixed the leaning out when hot issue. I also discovered the vacuum advance hose was delaminated and I think it was collapsing inside not allowing it to release the...
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    Light throttle ping from stoplight on hot days

    Also, I ordered a limiter plate. Looks like my light spring is pretty fast and the heavy spring maybe too slow?
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    Light throttle ping from stoplight on hot days

    I installed my backup distributor today and recorded some timing numbers with the vacuum can disconnected. Factory Green light spring and Brown heavy spring. No mechanical advance to about 900 rpm. 4° at 1000 rpm. 11° at 1200 rpm 15° at 1400 rpm Then it stalls until about 1900 rpm 17° at 2000...
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    Light throttle ping from stoplight on hot days

    I'll give the mopar ignition module credit. I swapped in a gm hei module and the car died today after a good heat soak. It turned out to be a weak signal from the magnetic pickup in the distributor. A couple thousandths was the difference in a no spark, no start situation. The mopar module...
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    Light throttle ping from stoplight on hot days

    After looking further into my distributor I believe it has 13° of distributor mechanical advance. So it should have 26° of mechanical advance. 26°+8°= 34°, right where I want to be. I may try an old Mallory unilite distributor I have. It has adjustment for the mechanical advance and springs...
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    Light throttle ping from stoplight on hot days

    Anyone have experience with tuning timing curves? I adjusted my heavy spring to slow the curve earlier and it helped a lot with the pinging but I'm not satisfied with the power curve. I'm currently running 8° initial plus 22° mechanical advance and 10° vacuum advance. It hits hard early but...
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    Light throttle ping from stoplight on hot days

    I got fed up last night a started to take the carburetor off to clean it again. Just out of curiosity I pulled one of the rubber vacuum caps and stuck it on my vacuum pump. The s.o.b. was cracked and leaking. It wasn't visible and never showed up when spraying it with carb cleaner. Well now...
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    Light throttle ping from stoplight on hot days

    It runs a pretty steady 3.5psi but I didn't take it out for a test drive to see if it changes while cruising.
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    Light throttle ping from stoplight on hot days

    At this point I've replaced every piece of rubber fuel line, the sending unit, the fuel pump, fuel filter, re-routed the fuel line from the pump to the carb, repaired the steel vent line back to the tank, cleaned the idle/low speed jets, added a little extra shot to the accelerator pump, and...
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    Light throttle ping from stoplight on hot days

    It's numbers matching carter bbd. I'll hook up a fuel pressure gauge this week.
  12. V

    Light throttle ping from stoplight on hot days

    Thanks, I didn't delete the EGR, it was done by a previous owner. I think your are referring to the PVC valve. It is still intact and works as it should. Heat doesn't cause air to separate from the fuel, it just vaporizes, meaning it takes up more space but it's still the same chemicals that...
  13. V

    Light throttle ping from stoplight on hot days

    So the pinging came back in 90° weather. Watching the AF ratio shows 12-13:1 when it happens. I stepped up the accelerator pump just to see what would happen. The pinging stopped. I think someone needs to come up with new carb rebuild setup specs for today's gasoline . I'm not sure why it...
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    Light throttle ping from stoplight on hot days

    I checked it Friday. It is spot on.
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    Light throttle ping from stoplight on hot days

    Today I plugged the charcoal canister purge line. It runs a lot smoother and holds the A/F ratio steady. Now I have to figure out what to do with the fuel tank vent. If its even hooked up to the tank.
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    Light throttle ping from stoplight on hot days

    Maybe the vapor line is plugged? I'll check it later today. I'm thinking about adding a return line. Any suggestions where to plumb it into the tank? Can the vapor line from the carbon canister be used? Assuming it is not plugged.
  17. V

    Light throttle ping from stoplight on hot days

    I just went for another drive. Cooler weather. It still creeps towards lean but not nearly as bad. 13.5:1 at idle and 15.5-16:1 cruising. Blipping the throttle several times makes it go rich and it stays that way for 10+ minutes.
  18. V

    Light throttle ping from stoplight on hot days

    I have the wideband hooked up now. I found the step up was coming in way to late so I put the old spring back in. That helped with part throttle AFR. It is a bit fat, running 13's while cruising and 14.5-15 with a little bit of acceleration. 11. 5 to 12.5:1 under moderate acceleration...
  19. V

    Light throttle ping from stoplight on hot days

    So I've been running 91 octane without ethanol for almost 2 weeks now. At this point I don't have any pinging whatsoever. It feels like it has less power. I'm running 6° initial advance timing now, up 10° from 4° atdc. I'm dropping it off tomorrow to have O2 bungs put in tomorrow. I'll have...
  20. V

    Field and load relay

    I get your idea but the actual wire to the regulator is spliced off the heavy ga wire to maybe 16ga then spliced again to the field windings. As for shutting off the alt while cranking, I just thought it is a weird way of doing it. They could have used the accessory b+ circuit to power the...
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    Field and load relay

    That's what I see too. The Black and Brown wires are heavy gauge, 10 or 12ga. That's why I think it was also used for additional accessories like emergency lights/sirens. I'm not sure why they used the starter solenoid for the ground to the relay coil. A continuous ground with an accessory power...
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    Field and load relay

    It does also send power on a 12 ga wire to the fuse box, probably for optional equipment.
  23. V

    Field and load relay

    This is something only the cars with the heavy duty charging option had. It only supplies power to the voltage regulator and alternator field windings.
  24. V

    Field and load relay

    My relay gave up the ghost today. Fortunately my battery had a high reserve capacity and I made it home. So my question is whether or not the relay is necessary. I replaced it with a Bosch style for now. Would there be any problem with just putting a fuse in line? I know other vehicles don't...
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