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jvandyke

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jvandyke last won the day on September 4

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About jvandyke

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    Hudsonville, MI

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  1. jvandyke

    3d printed knobs

    working on my kid's '72 240, he has one broken heater control knob. $25/pop? I quickly modeled one while watching UofM kick Wisconsin's butt last night and printed one off. It might work, pretty ugly so far, needs tweaking. I don't have set screws to see if it will catch but hey, it's easy and might work. https://www.thingiverse.com/thing:3154591
  2. It was carb related, I still don't know what happened but the Holley was flooding the left bank of the dual plane intake, flooding 3/5/2/8 (by memory) which are fed by the left side of the intake. I stole the Edlebrock 1407 off my '62 Galaxie and she fired right up and ran great. I've been through the Holley 4 times and can't figure out what is up, warped metering block, something crazy, I replaced every part to no effect. Might get one of these if I can't find what's up with Holley https://www.summitracing.com/parts/sum-m08600vs I think the spark issue was just the plugs starting to foul. I always assumed the timing light would fire when on a wire even if the plug wasn't sparking, someone set me straight on that. All ignition efforts were unrelated but we have a new cap and rotor. The Holley is messed up that's for sure. The old girl wants to rip it up with the Edlebrock on there, although I suspect it's too much for this motor being a 700cfm carb but it'll get the groceries home anyway until we can either sort the holley or find a replacement.
  3. I think I agree. Not firing (or weakly) to every other cylinder in the firing order is just too weird. I'll swap coils around, triple check static timing and all else ignition related. We'll get there.....again.
  4. I've got the Holley manual, practically memorized by now.
  5. No, I don't. There's a brass plug. Test fire, no joy. Pulled primary bowl, can't see anything amiss. 2,5,3,8 still not operational. Spark was weak with timing light. Then gone. ??? I STILL don't know if it's carb or ign.
  6. So I went out again last night, after finding other guys with a 2,5,3,8 no fire. Most claim carb issues. I had already checked for spark on those with a timing light and we had it. I went to check carb settings and found the primary dumped gas as I opened the inspection port so I reset that float but didn't have time to check operation. I think we introduced a lot of little issues as we went after the initial rough running, dying on acceleration. Cautiously optimistic that the flooded primary side was a major issue. I had checked it before and it seemed fine but that was during the intermittant fuel pump saga so, well, lot's of factors ganging up on us. Manual: they make them for crate ZZ4s? Heck yes I'll hunt one down. I assumed I would have to fumble about in the dark on that.
  7. poked around a bit tonight, interesting findings; fuel pump circuit: one of the two wires on the oil pressure sensor had fallen off (probably due to us messing with the distributor) fuel pump works steady 7psi of fuel now feeling exhaust after brief test fires and several cylinders are obviously not firing, every other cylinder in the firing order: 2,5,3,8, they have spark and compression so, bad coil? We swapped in a new one off some random HEI distributor I had bought 2 of (for an old Ford) and never used the one. I went to put the old one back on but it's center button totally fell apart. Hmmmm, I did a compression test on #3 it was fine, didn't do the others but can go back out in a bit, weird. After some googling: one side of the carb isn't putting out.....maybe.
  8. great stuff, much appreciated
  9. I'll try to grab some pictures of ignition and carb fuel/vacuum later tonight. Fuel pump is some orange wire to + and the - runs to chassis mount. Not the stock green. I need to trace it back to it's source and see where they wired it in. I'm pretty sold on the idea we have electrical issues at this point. It was not wired very well. Fuse block is hacked up and broken, we've already had to clean up the mandatory melted connection (I cleaned it and it stopped blowing fuses and getting hot). I'm thinking a good winter project would be to rewire everything, or at least investigate every circuit and clean connections, grounds and rework as needed. Of course, with a month of driving left here in Michigan we want it on the street for a bit yet, if possible. A 355hp 240z, really? Who wouldn't want it roll'n!!
  10. agreed, we need to dig deep to figure out how this beast was built, I suspect electrical issues at either the pump and/or the ignition system, if we're not getting a consistent 12v to critical systems all carb work is wasted (well, good to do in any event). Maybe the ignition switch is flaky and circuits on "run" or "start" aren't seeing what they're supposed to see. thanks for bouncing ideas off me. We know it was all good so it can be again, the street avenger 670 with our recent re-jet and choke linkage work was good so back to trouble shooting electrics. It is a cobbled up mess of wiring. How would an electric pump "normally" be wired in? I suspect off the oil pressure sensor circuit but who knows.
  11. had 7psi on crank and crappy idle but then I noticed it dropped to nothing....??? so you maybe onto something, if fuel pressure is all over the map.....voltage test at pump we had only 4v intermittently during crank, then I rigged up a different source, pump worked well, back to 7psi but no love running, could have flooded it by then. I don't know if this pump is hooked to oil pressure or what even....
  12. yes, pressure gauge present at carb and was okay, headed out to check level and pressure, the pump (some old Holley type) is loud but seems to put out sufficiently, gunna turn towards ignition again soon, I do have to recheck valve clearance, i haven't done a hydraulic lifter like these before. I think I'm doing it wrong. Problem predates my messing with clearances though.
  13. I did not yet. I know I have to but since the car ran the same after I was done it "shouldn't" be the issue.
  14. carb rebuilt, must be ignition?, starts and idles, rough like it's missing, (exactly like before) so thoughts?, rebuilt carb, checked filters, checked fuel supply (pump works fine) new distributer cap/rotor/plugs, tickled the timing a little we also tried to snug up the valve clearances a tad, FWIW Is it possible the cam jumped a notch?
  15. Yep, except that we had it dialed in for the last month. All systems go. Weird. I'm going to proceed under the assumption that it's a carb issue, and tear into it.....again. Something maybe just slipped out of adjustment, vacuum leak, or some dirt in a passage............maybe.
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