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03-17-2018, 12:41 AM | #21 |
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Re: Won't run without choke
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03-17-2018, 01:08 AM | #22 | |
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Re: Won't run without choke
Quote:
You most likely have better gasoline than we do. Back in the 60's we could do the same thing, when we had the good gas. Today's gas has a short shelf life, and boils at a lower temperature. It'll work with fuel injection, but it sure isn't made for engines with carburetors. |
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03-17-2018, 05:00 AM | #23 | |
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Re: Won't run without choke
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The Willys was 1944, the motorcycles were 1930's. |
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03-17-2018, 11:15 AM | #24 | |
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Re: Won't run without choke
Quote:
1 year of sitting here can produce gas that does not like to run, depending on the humidity level where the car is stored and the formulation of the gas. .
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03-17-2018, 11:30 AM | #25 |
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Re: Won't run without choke
I got the venturi back in and no luck. Here is another video with the venturi back in. Also plugs look horrible.
https://youtu.be/7EG3NYCTUg8 Sent from my SM-N950U using Tapatalk |
03-17-2018, 11:45 AM | #26 |
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Re: Won't run without choke
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The rust is from sitting for a long time with a lot of moisture in the crankcase and the cylinders. Be prepared for a leaky head gasket. It still sounds like it is not getting enough fuel (or too much air -- vacuum leak). Try swapping in a known good carb from someone else as a test. Also check the point gap and timing, as mentioned earlier.
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03-17-2018, 11:50 AM | #27 | |
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Re: Won't run without choke
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03-17-2018, 11:51 AM | #28 | |
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Re: Won't run without choke
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03-17-2018, 12:11 PM | #29 |
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Re: Won't run without choke
Update. New plugs installed. No change. It acts as if its running out of gas. Could I have the float set wrong? Points were a tight .015. It's now .018. It will idle but backfires as you can hear. Also the throttle shaft has play in it. Up and down as well as in and out.
https://youtu.be/3R3eLKlvVmU Sent from my SM-N950U using Tapatalk https://youtu.be/LYiTgBbtc30 Last edited by Garagekulture13; 03-17-2018 at 12:58 PM. |
03-17-2018, 01:07 PM | #30 |
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Re: Won't run without choke
OK, I am not a model A expert, as a matter of fact I am a novice with A's. BUT, I am an expert with lawn mower engines, which have a lot of similarities with a model A engine. I agree with everyone who says it is either getting to much air or not enough fuel. Try taking a spray can of carb cleaner, and while trying to slowly accelerate spray it into the carb intake. And of course around all the gaskets etc. Let us know what happens.
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03-17-2018, 01:20 PM | #31 |
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Re: Won't run without choke
After looking at condition of your spark plugs I have a very general question.
What is the overall condition of the car. I am thinking you very well could have a number of problems going on. Pictures of the engine and car would help. |
03-17-2018, 01:33 PM | #32 | |
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Re: Won't run without choke
Quote:
When it backfires and dies, does it backfire out the tail pipe? or out the carburetor? Do a compression test on all cylinders. With that much rust on the spark plug, I suspect you also have some crusty valve stems and some of the valves are not seating properly. Put some MMO in the gas (2 or 3 oz.). Set the point gap larger, to 0.020" and be sure to put a dab of cam grease on the distributor cam so that the follow does not wear down too fast. After that, check the timing and reset if needed. Gap the plugs at 0.035". Yes, it is quite possible that you set the float wrong. You quoted 5/8" in an earlier post. Where did you take that measurement? Between what and what? Did you try to tighten the exhaust/intake manifold nuts? Which way is the handle on the fuel shut off valve on the firewall pointing when you are running the engine? If you take the fuel line off of the carburetor and open the valve, will it put out a good strong stream into a jar?
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03-17-2018, 01:33 PM | #33 |
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Re: Won't run without choke
Under slight throttle the engine will rev up when I spray carb cleaner on the throttle shaft.
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03-17-2018, 01:53 PM | #34 |
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Re: Won't run without choke
Don't spray it on the throttle shaft. Spray it into the air inlet of the carb.
This is richening up the mixture, the same as partially choking it. Confirms what we suspected: too much air or not enough fuel.
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03-17-2018, 01:56 PM | #35 |
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Re: Won't run without choke
Plugs at .035. Points at .020. MMO in the tank, 3 oz. Back fires thru the carb but has once thru the exhaust. My compression tester dies not have a fitting big enough. So far no change.
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03-17-2018, 01:59 PM | #36 | |
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Re: Won't run without choke
Quote:
FYI, the fuel valve in the most recent photo you posted is in the OFF position.
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03-17-2018, 02:19 PM | #37 |
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Re: Won't run without choke
Car looks like it has had reasonably good care.
If it was mine, I would do the following to confirm if nothing else that things are working properly. Check timing, plugs, points, gas flow to carburetor, all wiring, gas cap, (have you tried running with gas cap off?). Than I would remove carburetor and completely clean everything, making sure all passages are open including jets. I think you have a couple of things going on. Nothing major, just a car that maybe has been sitting and/or has not seen much use in a while. You need gas and spark, that’s it. I have seen similar problems in other Model A’s over the years. Take a little time to make sure everything is right. One or two weak systems, everything goes down hill fast. Enjoy. |
03-17-2018, 06:40 PM | #38 |
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Re: Won't run without choke
Apparently I'm not a carb expert. I went to a retired gentleman's house today in which I knew was into Model As. I asked if he had a Zenith carb I could barrow and told him my issue. Well he did. I rushed straight home to put it on and he called 3 times before I made it back. He was excited I had a Model A. I put it on the car and it fired right up and ran good. I went out for a spin and it still acted weak. Put fresh gas in and drove the car to the gentlmans house. It ran pretty rough on the way there. Got there and he sees one of the copper forks had broken off that goes on the spark plug. Yup he had one of them too. Put that on the car and it has ran great since. The gentleman suggested I check the valves and really go over everything. Thanks everyone for sticking with me on this and trying to help. I realize it's hard to do especially not seeing it in person. Plus I didn't help the cause any when I hadn't done the rebuild correctly. Again thanks everyone!
https://youtu.be/X1Jxiqp16Xw Sent from my SM-N950U using Tapatalk |
03-17-2018, 06:54 PM | #39 |
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Re: Won't run without choke
Distributor crossfire?
Sometimes 3 and 4 want to crossfire. Try another distributor body. |
03-17-2018, 08:02 PM | #40 |
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Re: Won't run without choke
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