69 Riviera cuts out unexpectedly

Discussion in 'Wet behind the ears??' started by Woodsy, Sep 13, 2020.

  1. Nailhead in a 1967

    Nailhead in a 1967 Kell-Mnown Wember

    how did you find out about the replacement 455 engine?
    did you check at the rear of the engine, where the tranmission meets the bell housing (12 o'clock position)?
    a 430 has big numbers saying 430 there:

    P_20181101_163125.jpg.bfaf076c65568c6ebf1fb9530cf88799.jpg

    and a 455... well: 455 :)

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  2. bostoncat68

    bostoncat68 Platinum Level Contributor

    Going back to your original issue. The GM HEI distributor is commonly used as an upgrade to older cars. Should work fine. The resistor wire mentioned in a prior post is worth checking. If the hot driving issue is recent I might consider trying a new coil in the HEI distributor. They are known to fail from heat. Others might have a testing routine to use?
     
    Woodsy likes this.
  3. GSX 554

    GSX 554 Gold Level Contributor

    It doesn't matter if its a 430 or a 455 and you say it has the regular fuel pump on it that can be tested but I don't think fuel is your problem unless its vapor lock

    Buick HEI is almost bullet proof . BUT .... The Module and the pick-up coils will go bad and produce the symptoms you describe . Especially the pick-up coil . Check the wires for it and see they are not being contacted by the advance mechanism . It can be Ohmed to check . Usually 700-1,000 ohms when good but you would have to check it at moment of failure . It can get hot and " OPEN " and then when it cools go back to normal

    Modules tend to fail outright and never recover .
     
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  4. GSX 554

    GSX 554 Gold Level Contributor

    Also true . I forgot to mention it .
     
    Woodsy likes this.
  5. docgsx

    docgsx It's not a GTX

    The resisted wire was the problem with my 70. Once I replaced that, I had no more issues.
     
  6. GSX 554

    GSX 554 Gold Level Contributor

    Best way to power a HEI is to use a Bosch Relay to provide the 12 Volts . Simple circuit .
     
  7. Woodsy

    Woodsy Member

    Hey thanks. I’ll check later and get back to you
     
  8. Woodsy

    Woodsy Member

    Yep, mine has 455!
     

    Attached Files:

  9. Woodsy

    Woodsy Member

    Thanks, trying to find a replacement coil to Blume without success at the moment.
     
  10. Woodsy

    Woodsy Member

    Thanks
     
  11. LARRY70GS

    LARRY70GS a.k.a. "THE WIZARD" Staff Member

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