08-29-2015, 03:53 PM | #1 |
Junior Member
Join Date: Aug 2015
Location: Merrill Wisconsin
Posts: 2
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Rough running
I just bought a 1930 Tudor and an having a problem with engine power. It starts right up but in will lose power an backfire if I press the accelerator. if I advance the spark control lever to about a midpoint if runs better, and I can rev. the motor in neutral, however when in gear and driving it lacks power. Opinion could this be engine wear?
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08-29-2015, 04:56 PM | #2 |
Senior Member
Join Date: Dec 2010
Location: FRESNO, CA
Posts: 12,560
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Re: Rough running
First, do a lot of reading on "HOW TO SET UP & OPERATE A MODEL A PROPERLY"
Bill W.
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08-29-2015, 10:40 PM | #3 |
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Join Date: Nov 2010
Location: Oklahoma City, OK
Posts: 83
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Re: Rough running
I had some trouble with this recently. Turned out that the nut that held the pigtail wire in the distributor had loosened and was letting it hit the distributor body. I'd look there first and time the engine as you reassemble. Shouldn't take long to do at all.
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08-29-2015, 10:44 PM | #4 |
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Join Date: Nov 2010
Location: Oklahoma City, OK
Posts: 83
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Re: Rough running
That said, you will get a lot of advice on what to do next. New gas, clean the carb, time the engine, backlash in the distributor cam, fuel flow issue, rust in the gas. You name it.
All of them are good things to look at, but be sure and only do one at a time so you know what actually worked. |
08-30-2015, 04:37 AM | #5 |
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Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
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Re: Rough running
While driving down the road advance the spark until you no longer feel an increase in power or speed.
With my totally stock engine and timing set correctly, I advance the spark half way as soon as the engine starts and advance to 3/4 of the way down at 40 to 45 MPH and have good power. Is this your first Model A? It is only 40 H.P. |
08-30-2015, 07:46 AM | #6 |
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Join Date: Aug 2015
Location: Merrill Wisconsin
Posts: 2
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Re: Rough running
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