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About Ron1200

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    Senior Member

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  • Gender
  • Location
    Olympia, WA, USA
  • Cars
    '79 Datsun 620 KC, '59 Alfa Romeo Giulietta Sprint
  • Interests
    Vintage Vehicles & Motorcycles (VTR1000 Naked, Moto Guzzi Stelvio, Yanaha SR500)
  1. Thanks for the help... I'll check behind the ICM Mike...
  2. Update: Had the truck out this morning, noticed a slight miss just before I reached my destination (about 15 min driving time). On the way back, It started dying after about 5 minutes. This time I had a multi meter and checked the following with the ignition on: Coil connections Ignition/start wire to coil + = 12v Coil + = 12v Coil - = 12v Continuity tested Black/white from module to coil = good Blue from module to coil = good Spark Plugs No spark A friend suggested using a can of compressed air to cool the module and see if it starts. Well, not having that but having a can of semi-cool diet coke, I dribbled the coke over the module and this seemed to work... but only for a mile or so. However it was repeatable, touching nothing else, this process worked five times in a row. I believe I'm here in my trouble shooting: Cap & Rotor Good - Installed new parts Coil is good - changing out the coil did not fix the problem Ignition switch 12v power is good - When the problem happened, I had 12v at the coil Wires between the coil and ICM are good - When the problem happened, I confirmed continuity Ignition module is suspect - When cooled with coke, it would start and run for a short while I have ordered a replacement ICM (STANDARD MOTOR PRODUCTS LX516).
  3. When it died in Tacoma, there was no spark at the plugs. I didn't check the coil. At the time I thought it could be Ignition module, coil or switch relay (DZ Start).
  4. Hi I have a 1979 620, L20B, Matchbox Distributor with MSD Blaster 2 coil. My 620 typically starts easy. Normally, when cold, it starts within 1/4 to 1/2 of a revolution (longer if it sits for more than a week). Within the last couple of months, it has occasionally refused to start (Crank - No Start) when hot and not allowed to cool (Like when you go into the store to by beer, and it won't start when I return to the car). This condition is intermittent, but has been increasing in frequency. Saturday took the 620 to the Tacoma Caffeine & Gasoline, drove from Olympia. It died on Pine St but restarted after about 10 minutes. Drove it back to Olympia but it died again, this time it refused to start at all. So called for a tow home. I couldn't start testing until the next day. And the truck started immediately when cold. Originally, I was thinking It was a wiring issue with the connectors at the Ignition Module. I've changed both connectors and soldered them to the wires. This obviously did not correct the problem. From what I've read on the forums (Ratsun, Zcar, Datsun1200), a bad coil can cause a engine to crank - no start when the coil has not had sufficient time to cool. I went ahead and changed the coil to a Hitachi I had in my parts stash, but at this point I don't know if it's going to fix the issue as both coils test good when cold. This is what I found when I tested the coils at room temp: MSD Blaster 2 Test Spec Primary .7 .7 (meter at 200 Ohm) Secondary 4.5 4.5 (meter at 20K Ohm) Hitachi 22433-H7280 Test Spec Primary 1.0 .842 - 1.02 (meter at 200 Ohm) Secondary 10.0 8.2 - 12.4 (meter at 20K Ohm) Can a hot coil fail, but test good when cold? Am I on the right track with my troubleshooting? Anything I'm missing? I hate Intermittent problems..... Thanks
  5. Ron1200

    Rear air shocks

    Thought I’d update my earlier post... After converting to 720 4x4 leafs (3 leafs - 4th overload leaf with funky weight was removed) my opinion of the air shocks has completely changed. My 620 now rides as good as a car! Plus, I can add air for heavy loads when necessary. I typically run them at 30 psi. I’m using 3” lowering blocks.
  6. Ron1200

    Ron1200's '79 KC 620

    Yeah my life is projects, projects, projects right now... :) The master cylinder is 13/16.
  7. Ron1200

    Ron1200's '79 KC 620

    Finally got the 720 4x4 springs installed on the back of the 620 this weekend. The ride is 110% better... No more bouncy-bouncy - Just a well controlled ride. It rides like a car. Even took wifey for a ride and she gave it a thumbs up. And as a bonus, both sides measure the same the distance from the ground to the bottom of the wheel arch at the center-line of the rear wheel. With mono springs, 3" lowering block and no air in the air-shocks: DS 24 7/8" PS 24 5/16" With 720 4x4 springs, 3" lowering block and no air in the air-shocks: DS 24 5/8" (+3/16") PS 24 5/8" (+5/16") Nothing seems to happen on the my 620 without 'issues'... Turns out that one of the 4x4 springs I got from the wrecking yard was tweaked. I didn't notice this until I removed the shackles. So took them to Right Way Springs in Tacoma for repair. On their recommendation (I don't know shit about springs) they removed the over-load leaf with the funky weight on the end of it. Re-arched springs (freshly painted) and new bushings Old mono leaf spring New 720 4x4 springs This thing drives, rides and looks so much better than when I got it. No hate at the original owner, I bought it with the understanding that it was a 'project'.
  8. Ron1200

    Ron1200's '79 KC 620

    So spent my Sunday fixing the photos in this thread due to the Photobucket F-up. Will add that I changed out the brake master cylinder and after some initial bleeding issues, all is working well now. I went with this one from Rockauto for $36 (no core needed). CARDONE SELECT 131839
  9. Ron1200

    What Trailer Wiring Kit for 620 Pickup ??

    Here's a '79 wiring diagram courtesy of Phixius... It should be close to a '78. The stock wiring supports 4-wire trailer lighting Ground, Parking, Right turn/Stop, Left turn/Stop). Typical lighting for a trailer sized for the Datsun will use a 4-wire flat plug. So all you really need is some wire and a plug to match your trailer. I like these Express Seal (16-14) Weatherproof Butt Splice Connectors ($4.65 for 10).
  10. Ron1200

    Clutch replacement 620

    There is a lot of info in the Drivetrain sub-forum. A search for "clutch question 620" returned 76 results. Here are a few: roadster clutch into a 620? Clutch Question for a 620, L20b, 6-bolt 200mm flywheel, 280zx 5-speed Mix & Match clutch question.. 'Search' is your friend... ;)
  11. Just realized that I didn't finish off my thread... Don't you hate it when there is no resolution. :rolleyes: I went with the EXEDY 06008 Clutch Kit (Disk, Pressure Plate, Pilot Bushing and Throw-out bearing). This application is for a 200 mm Flywheel. The 06008 kit fits the following: NISSAN 200SX 1977-1980 NISSAN 510 1978-1980 NISSAN 610 1974-1976 NISSAN 710 1975-1977 I can report that it installed on my L20b without issue and has been working fine since Sept. 2014. :thumbup: Currently its available at (I'm sure other places also): Rockauto $75 Amazon $90
  12. Thanks Morrisun! I was thinking of using Apple Hydraulics in NY. Hagens is much closer to me. I've added it to my favorites...
  13. Ron1200

    spare tire carrier crank

    Thanks Rizzo I've added this to my Amazon wish list :thumbup:
  14. Ron1200

    Lug nuts?

    eBay or Amazon. Look for full sets. I just bought a set of 24 for my 620. Way cheaper than buying individual nuts.
  15. Ron1200

    Daymakers in my 620

    In Washington State I believe the green light in front is reserved for volunteer fire fighters. At least it used to be this way. As noted blue is reserved for police. And of course, red is for emergency vehicles. Cool light show you got there... Don't know if you'll like all the attention you may get 'wink'

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