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Hard to start - Chrysler Newport Custom

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Old Jan 13, 2018 | 07:35 PM
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69ChryslerNewportCustom's Avatar
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Exclamation Hard to start - Chrysler Newport Custom

Hi fellow Mopar owners,

I was hoping you might be able to assist me here.

I have a 69 Chrysler Newport Custom Convertible here in sydney that usually runs extremely well. Lately, if I don’t start the car once a week it doesn’t want to start cleanly. If I start it every couple of days, it starts really well and runs very well.

After a week, I turn the ignition on while pumping the throttle to prime the engine, starter motor will turn well, although it simply won’t start, even with a spray of ‘start ya bastard.’
I than have to put the jumper cables on, keep pumping the throttle, and eventually after 10 attempts it will start. Than it will run perfectly for the time I’m driving it.

i have no idea why it keeps playing up after sitting for only a week and need some help.

Starter Motor has been replaced and working fine.
Leads plugs and distribution cap have been replaced.
Fuel is brand new with the right amount of lead additive.

alternatir seems to be working fine as once he car starts it charges.

Any chance you have some ideas?
Attached Thumbnails Hard to start - Chrysler Newport Custom-f63583ea-1a5e-4e69-a866-b2203cbd84f3.jpeg  
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Old Jan 13, 2018 | 09:20 PM
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RacerHog's Avatar
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Welcome to the site..
Sounds like the carb is loosing it's prime?
Also Check for Ignition in the crank mode after it sites.

Last edited by RacerHog; Jan 13, 2018 at 09:24 PM.
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Old Jan 14, 2018 | 06:03 AM
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Archer's Avatar
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69C -

While that's not the recommended procedure for starting an older carborated car, if it's been working, then something changed.
Pumping 2 - 3 times, and holding at 1/2, THEN turning the key is more common.

If the car initially has a strong crank from the starter, consider the choke being stuck open. When cold, it should be closed.
If the car has an initial weak crank, then assume a bad battery or ground short.

Archer
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Old Jan 15, 2018 | 01:20 AM
  #4  
69ChryslerNewportCustom's Avatar
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Hi Archer and Racerhog, thanks for the replies.

It definitely seems like carb is losing its prime. How would I go about checking that?

Also, Archer, how could I check if the choke is stuck open? Also, is because it is stuck open, it is drying out or something?

Also, the exact way you described how to usually start the car is exactly how I would normally.

I am hoping you could continue this conversation?
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Old Jan 15, 2018 | 07:33 AM
  #5  
Archer's Avatar
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69C -

Kinda easy. With the car stone cold, pull the air cleaner and look at the carb. The choke plate should be nearly closed (horizontal). If it's open (angled or near vertical), then there's a problem. If could just be stuck and respond to a little convincing or the element may be fried, in which case, you'll either need a new one or switch to a manual choke.

You didn't say what engine or carb.
Just posting a pick of the carb would help.

Archer
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Old Jan 15, 2018 | 09:54 PM
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TVLynn's Avatar
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If it has the 440 with the factory Holley ? I would start with checking the choke operation. otherwise if it has the stock Holley a new carb if possible and a heat insulator
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Old Jan 15, 2018 | 10:58 PM
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69ChryslerNewportCustom's Avatar
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From: Sydney
Hi Archer,

The engine is a 6.3L 383cid V8. It's a 1969 build but I believe the release year was 68.

I've attached an image of the engine.

I will have a look when I get home at what I can see.

Thanks gents
Attached Thumbnails Hard to start - Chrysler Newport Custom-2018-01-16_17-52-09.png  
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Old Jan 16, 2018 | 05:44 AM
  #8  
Archer's Avatar
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69C -

Gonna guess it has a 2 barrel carb.
Check the choke COLD and report back.

Archer
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