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post #1 of 17 (permalink) Old Aug 1st, 20, 2:52 PM Thread Starter
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Glenn
 
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Starting issues

I own a 1969 Chevelle SS396 with the 350 hp engine that runs very well. I live in a hot climate, it's usually 80 or 90 degrees year round. Whenever I start the car cold I have to crank 30-60 seconds while furiously pumping the gas pedal. Sometimes so long it starts to drain the (new) battery. Squirt a shot of starter fluid into the 4bbl and starts immediately. Anyone know a fix for this so I don't have to take off the air cleaner every time I want to go for a ride?
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post #2 of 17 (permalink) Old Aug 1st, 20, 3:35 PM
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Re: Starting issues

I would start with fuel draining out of the carburetor while sitting. If it's a QJ, the main well leaks internally. If it's a Holley, they generally leak out onto the manifold. The question is if this is the case, why is it taking so long to fill the carb up, and, Does the choke work at all?
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post #3 of 17 (permalink) Old Aug 1st, 20, 3:57 PM
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Re: Starting issues

Install electric fuel pump.

A carb isolator gasket or plate might help.

Either your fuel is boiling off, leaking or evaporating. The actual time between starts might answer what is the cause. Your float bowls are losing fuel between starts. A mechanical pump take a few seconds of turn over to refill the bowls. An electric pump will fill the bowls by waiting a few seconds with the ignition on before cranking. A properly functioning choke helps get engine started without a lot of accelerator pumping.
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post #4 of 17 (permalink) Old Aug 1st, 20, 5:04 PM
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Eric
 
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Re: Starting issues

How long had the car been sitting when this happens? Is the choke adjusted correctly?

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post #5 of 17 (permalink) Old Aug 1st, 20, 8:14 PM
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pete
 
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Re: Starting issues

Modern gas evaporates rather quickly (the bowl will 'dry out' after a few days). The carb may be simply 'out of gas'. There may be nothing 'wrong'.

If the bowl is empty, the car needs to crank (to 'run' the mechanical fuel pump) to replace the 'lost' gas before it will start. Instead of pumping the gas pedal trying to start it, recommend one 'pump' to set the choke, repeat short (3 sec or so) bursts from the starter until it starts (3-6 bursts should suffice); do not touch the gas pedal. Let the system do its job. That process starts my car every time after it has sat for a few (4-5) days.

The first time I ran out of gas (1968?), I had to turn over the engine several times (to cycle the fuel pump) to pump the added gas from the tank to carb. The second time I ran out of gas (likely also in 1968?), I 'saved' a couple of ounces of gas to put directly into the carb; started right up. I rewarded myself with a beer.

If the car is 'doing' it everyday. It's not evaporation. But, as others have said, still may be related to the 'empty bowl'.

Pete
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post #6 of 17 (permalink) Old Aug 1st, 20, 8:43 PM
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Re: Starting issues

Quote:
Originally Posted by N1111Z View Post
Squirt a shot of starter fluid into the 4bbl and starts immediately

The only thing I will add is that you should throw the starter fluid in the trash. It will absolutely kill an engine if you are not careful. Gumout carb cleaner will start the engine just as well and wont hurt anything.
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post #7 of 17 (permalink) Old Yesterday, 5:21 AM Thread Starter
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Glenn
 
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Re: Starting issues

Quote:
Originally Posted by BillK View Post
The only thing I will add is that you should throw the starter fluid in the trash. It will absolutely kill an engine if you are not careful. Gumout carb cleaner will start the engine just as well and wont hurt anything.
YIKES thanks! It's a Carter. No doubt the gas is boiling off after each ride cause it's always 90 degrees here. I had this car in high school and while I can't remember having this same starting problem what I do remember is always keeping a mason jar with gasoline in it under the driver's seat. Not genius teenager. Thanks for the inputs.
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post #8 of 17 (permalink) Old Yesterday, 8:33 AM
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Re: Starting issues

pump the gas pedal three times and crank. then hold the pedal down and crank

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post #9 of 17 (permalink) Old Yesterday, 9:09 AM
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Re: Starting issues

Trivia:
Both of my 70s, LS-5/M-22 (one owner) and my FAKE SS454 Wgn. On both 70s, I have the cheap $35.00 Electric fuel pump mounted at the tank, With metal fuel filters before the pump. On a toggle switch.
Turn on the Elect. pump, When it quits " CLICKING ", Hit the key, One or two spins and it fires up. When I drive the Wagon EVERYDAY in the summer. I NEVER use the Elect. pump.
Also, If the Mech. pump craps out, Turn on the Electric and keep driving....
Bob


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post #10 of 17 (permalink) Old Yesterday, 12:29 PM
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Re: Starting issues

Might this engine have a stock Q-Jet intake manifold, and stock Q-Jet carb??? If so, there might be a serious issue in the selection of gasket between carb and manifold.

If the manifold is a Q-Jet, and a square flange carb has been subbed onto it, it might be a gasket and adapter issue.

Please advise if these paramters have been changed, or are as stock, and what was stock for that engine.
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post #11 of 17 (permalink) Old Yesterday, 10:35 PM Thread Starter
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Glenn
 
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Re: Starting issues

Quote:
Originally Posted by Dave Ray View Post
Might this engine have a stock Q-Jet intake manifold, and stock Q-Jet carb??? If so, there might be a serious issue in the selection of gasket between carb and manifold.

If the manifold is a Q-Jet, and a square flange carb has been subbed onto it, it might be a gasket and adapter issue.

Please advise if these paramters have been changed, or are as stock, and what was stock for that engine.
I have no idea. This car was built by founding member Alan F, if he is still around maybe he would opine?
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post #12 of 17 (permalink) Old Yesterday, 11:24 PM
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Re: Starting issues

Quote:
Originally Posted by N1111Z View Post
I have no idea. This car was built by founding member Alan F, if he is still around maybe he would opine?
Post a picture of your carb and manifold.
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post #13 of 17 (permalink) Old Today, 9:20 AM
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Re: Starting issues

Quote:
Originally Posted by N1111Z View Post
I have no idea. This car was built by founding member Alan F, if he is still around maybe he would opine?
It is a stock manifold, stock carburetor with stock gaskets. The well plugs were sealed with epoxy. Because I drove the car very sparingly, I always assumed the bowl was empty after sitting for extended periods. There was a lot of attention paid to setting up the choke to work correctly but that’s where I would start to look. I remember it being very cold blooded and needed the choke desperately.

Knowing that it was dry when I went to start it, I did the same just cranked on it until it caught. It was harder to keep running before I got the choke where I wanted it than to get it running. I’m suspecting the choke. If it were a Holley with giant squirters you can overcome the lack of a choke.

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post #14 of 17 (permalink) Old Today, 1:01 PM
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Re: Starting issues

"It is a stock manifold, stock carburetor with stock gaskets"

OK, well.....JUST WHICH "STOCK" MANIFOLD AND CARB SET??????
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post #15 of 17 (permalink) Old Today, 2:49 PM
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Re: Starting issues

Since its so hot there do you even need a choke? Try disconnecting it by removing the flapper, that way you will have fast idle.. Then see how it starts..

On my fair weather cars with performance quadrajets that had the air horns epoxy smoothed with the choke flap removed, I used to just use a AC solenoid that bumped the idle up to 900, I'd just flip that on and fire it up, they started every time no trouble..
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