1971 Chrysler Newport Custom 383, rebuilding in Europe

Member's Projects & Restorations

  1. Unix

    Unix Member

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    Good point. But i dont have a fan clutch, it's a rigid system. And no, it didnt solve the problem. It just delays the symtpoms. It might be the carburator, and i'll change the plugs as well. And i'll check the coolant temperature with a guage, as i only have an idiot light on the dash (which doesnt come on when the problem arises)
     
  2. thethee

    thethee Active Member

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    Sorry but in that case I don't quite understand, how do you know it runs hot in stop and go traffic?
     
  3. Unix

    Unix Member

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    it's the only thing that changes when it starts running rough. I can do 500km with no problems as long as i'm moving most of the time. But after about 20 minutes in stop & go traffic it barely idles on DRIVE, if u put it in park it can run all day. It's what comes to mind, but like i said i have to properly measure the temp, because it might be ok. Charging is fine, always on the good side...
     
  4. Unix

    Unix Member

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    Ok, took some measurements. The car seems to run @ 195F most of the time, even when it's baking hot outside. So it's not a heat issue.

    What i noticed, it starts stumbling when hot under load / in drive when standing at the lights... It's seems to be getting worse. I don't believe it's a fuel issue ,because it feels as if it starts losing ignition, until it dies. It fires right up no problem, in park idles fine, but once in geat it dies again.

    I'll start with the bascis:
    * spark plugs
    * spark plug wires
    * check the distributor cap
    * it does have Mopar electronic ignition (Proform Distributor/Ignition Control Module Kit 66993; Mag Trigger for B Mopar | eBay)
    So i was also thinking maybe something with the vacuum advance, or the electronic module is faulty ?

    Anything else you might recommend i check ?

    Like i said the problem occurs when engine is properly warmed up to operating temp, stop at the lights and it takes about 30 seconds for it to start stumbling, and another 30 seconds and it quits running...
     
  5. OldWarHorse300

    OldWarHorse300 Active Member

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    ...I would start from that distributor and that orange box...
    Hope you find that issue. Nice work and beautiful car!
    Regards
    Mika
     
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  6. bigmoparjeff

    bigmoparjeff Senior Member

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    A quick way to determine if your problem is fuel or ignition would be to spray a little starting fluid into the carburetor while when it starts to stumble. If the stumble goes away, you've got a carburetor problem. A carb problem is likely if you are running either of the troublesome 2 barrel carbs: Holley or Carter. I believe your '70 would have come with the Carter from the factory.

    Jeff
     
  7. Unix

    Unix Member

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    My previous reply got lost, so here it goes again. Issues were caused by carb being loose, and distributor not set and tightened correctly. Had the carb replaced with rebuilt one and ignition set correctly and all is good. Bad news is the AC died today, have oil all over compressor and the inside of the hood. Theres was some weird metallic sound and then i lost cold air. Must have been some catastrophic failure. Otherwise nice cruise today.

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