Problem with stalling

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merletanner
Posts: 182
Joined: Thu Mar 27, 2014 6:15 am

Problem with stalling

Post by merletanner » Thu Sep 06, 2018 5:00 am

Good morning,
I have a 1947 Packard Custom Super Clipper
with a 356 cu engine. I have had my carburetor
rebuilt and a rebuilt fuel pump yet have have
a problem with the engine stalling. I have to reve
up the engine to have enough power to get up
a modest slope.
Any suggestions?
Thanks
Merle

Dave Czirr
Moderator
Posts: 4967
Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: Problem with stalling

Post by Dave Czirr » Thu Sep 06, 2018 6:08 am

Did you have the same problem before you had the carburetor and fuel pump rebuilt?

What diagnostics have you done thus far? Timing? Manifold vacuum? You might start with a good basic but comprehensive tune-up if it hasn't been done recently.

merletanner
Posts: 182
Joined: Thu Mar 27, 2014 6:15 am

Re: Problem with stalling

Post by merletanner » Thu Sep 06, 2018 12:34 pm

Thanks for your feedback. I had a shop put in new
plugs, wires, points and condenser. I had not driven it
any distance before this work was done as it was under
restoration so I don’t have a base line for comparison.
This has been a persistent problem. I did check
compression about a year ago and it was in spec.
It starts fine and idles smoothly so I had not thought
about checking timing.
Thanks will check the timing just to be sure.

merletanner
Posts: 182
Joined: Thu Mar 27, 2014 6:15 am

Re: Problem with stalling

Post by merletanner » Thu Sep 06, 2018 12:38 pm

Just to be clear, the stalling occurs when I try to
give the engine gas when trying to accelerate.

Dave Czirr
Moderator
Posts: 4967
Joined: Tue Jun 16, 2009 5:30 am
Location: New Jersey

Re: Problem with stalling

Post by Dave Czirr » Thu Sep 06, 2018 1:00 pm

With the engine not running, peer down the carburetor throat (choke open), stroke the accelerator linkage, and verify two streams of gasoline from the accelerator pump.

Also, check for a vacuum leak. Good diagnostic is to check intake manifold vacuum, should be 18-20 inches for an engine in good condition and state of tune.

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