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04-05-2016, 08:01 PM | #21 |
Member
Join Date: Apr 2015
Location: Ohio
Posts: 63
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Re: new engine runs too rich HELP!!
PV is original and it has back fired so as soon as my new one gets here I will change it out. Also, when I screw the mixture screws in it keeps running as if nothing has changed. Hopefully the new jets and pv will arrive tomorrow. Also I will reset the timing and adjust it up a bit. It's strange because when I first started the engine up after the rebuild, it would idle fine and rev up good. It has only been run in for an hour or so.
Ken do you belong to the Penn-Ohio group? I met some of those people last year up in New Phillie or in that area.
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Jim P. central Ohio 1930 Tudor Sedan 15 grandchildren and 2 great grandchildren and loving it!! |
04-05-2016, 08:18 PM | #22 |
Senior Member
Join Date: Aug 2010
Location: Cleveland, Ohio
Posts: 171
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Re: new engine runs too rich HELP!!
I belong to the NOMAC (Northern Ohio Model A Club) based in the Cleveland area.
I have several customers in Penn-Ohio. We will be having several tours this year, perhaps you could make it up for one. |
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04-05-2016, 08:22 PM | #23 |
Senior Member
Join Date: Aug 2010
Location: Cleveland, Ohio
Posts: 171
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Re: new engine runs too rich HELP!!
BTW, the intake manifold you are running is the best single carb manifold on the market. My Tudor's engine was used as a dyno mule to test the various intake systems.
At this point, see if you can borrow a Stromberg carb to try. Bolts right on. K |
04-06-2016, 10:38 AM | #24 |
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Join Date: Nov 2010
Location: Anchorage, Alaska
Posts: 9,115
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Re: new engine runs too rich HELP!!
You can buy brand new Strombergs from Jegs, Summit, Vintage Speed, Speedway, etc. Check out the Stromberg site: http://www.stromberg-97.com/
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Alaskan A's Antique Auto Mushers of Alaska Model A Ford Club of America Model A Restorers Club Antique Automobile Club of America Mullins Owner's Club |
04-06-2016, 10:58 AM | #25 |
Senior Member
Join Date: Jan 2016
Location: Upstate in NY's beautifull hills
Posts: 173
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Re: new engine runs too rich HELP!!
Don't forget plug gap can affect timing . Gap too close --plugs can get sooty , above .035 --advance or hotter plug .
My A was showing hot plugs & timing etc was right on , but plugs were around .037 to .039 whereby gapping them to a tight .035 brought a nice light brown color . W/ all of your mods, maybe plug gap should be non standard ? |
04-06-2016, 11:24 AM | #26 |
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Join Date: Jun 2015
Location: Red Deer, Alberta
Posts: 5,046
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Re: new engine runs too rich HELP!!
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If you don't hear a rumor by 10 AM, start one!. Got my education out behind the barn! |
04-07-2016, 07:54 PM | #27 |
Senior Member
Join Date: Apr 2014
Location: Connecticut
Posts: 130
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Re: new engine runs too rich HELP!!
94's use vacuum secondary's which look for low vacuum to indicate you are doing 30 and want to be doing 70 which is where the problem lies. Model A's are a low vacuum motor. Have people run 94's on them absolutely some block the secondary completely and choke down jets so she runs right but then no secondaries when you do need it. Whats a fellow to do? Stromberg 97, buy set .44 jets and the secondaries are mechanical (Yeah problem solved) I pretty much have same engine as you I just bought the BIG97 stock jets are .45 which another friend of mine runs and he ended with the .44's. I bought a pair when I got mine, my friend bought from .33 up to .45 and tried them all. Now I don't have to, and neither do you. 94 and 97 use same manifold bonus!
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04-07-2016, 09:09 PM | #28 |
Member
Join Date: Apr 2015
Location: Ohio
Posts: 63
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Re: new engine runs too rich HELP!! Up date111
Well, after looking at everything and trying most suggestions from here, I got to rethinking the symptoms. What I thought was a rich condition was actually a lean condition. When I first fired the old girl up, it ran well. After playing with the carb and timing, it started to change. It would only idle with the air cleaner on or when you partially hand chocked it. Plugs were black as soot, burned your eyes and hard to breath.
I reved motor up and closed the butterfly 8-10 times. What ever was plugging up the idle circuits must have broken lose. It now idles at 450 with no help. I did change main jets out to .045. Didn't check the vacuum but intial start up show 16-18hg. Still have more work to do but making progress. I can see a 97 in my future. Thanks again for all the suggestion and help. I will update as I make changes. Jim
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Jim P. central Ohio 1930 Tudor Sedan 15 grandchildren and 2 great grandchildren and loving it!! |
04-07-2016, 09:29 PM | #29 |
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Join Date: Jul 2011
Location: Redondo Beach, CA
Posts: 5,849
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Re: new engine runs too rich HELP!!
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04-07-2016, 09:35 PM | #30 |
Senior Member
Join Date: May 2010
Location: Englewood, Colorado
Posts: 1,372
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Re: new engine runs too rich HELP!!
Call Don Baxter at Baxter Ford Parts in Lawrence, KS. Best Stromberg carb guy anywhere
If you need his #, call me Steve Becker Bert's Model A Center 800-321-1931 |
04-07-2016, 09:38 PM | #31 |
Senior Member
Join Date: Apr 2014
Location: Connecticut
Posts: 130
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Re: new engine runs too rich HELP!!
Y is correct I used wrong term
the 94's use vacuum actuated power valve that needs to be blocked/changed to keep it from opening too soon. It's not rocket science, but it can be a pain in the ass to get set up so the setup works right. 97's have a mechanically actuated PV that opens when the accelerator pump plunger reaches the bottom of the bore. No guesswork about when the PV opens! Otherwise, they're both just 2bbl carbs... |
04-07-2016, 11:13 PM | #32 |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: new engine runs too rich HELP!!
"Well, after looking at everything and trying most suggestions from here, I got to rethinking the symptoms. What I thought was a rich condition was actually a lean condition. When I first fired the old girl up, it ran well. After playing with the carb and timing, it started to change. It would only idle with the air cleaner on or when you partially hand chocked it. Plugs were black as soot, burned your eyes and hard to breath."
When you first said the exhaust burns your eyes, my first thought was a lean mixture. I've been behind cars that had vacuum leaks and the lean mixture can really stink and burn your eyes even if you are behind them a car or two at the stop light. |
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