11985 dodge won't start when cold

1985 DODGE RAM
175,000 MILES • V8 • 2WD • MANUAL
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REDNECKOKIE
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I have a 1985 Dodge D250 2wd pickup. It won't start when the weather is cold, but will start right up when it reaches mid day around 50 degrees.
In the morning it will crank fast but never hits like it's going to start. I have tried starter fluid and priming it with gas and nothing seems to work. Around noon or so I go out, pump the peddle once and it fires right off.
The truck has also started running sluggish. It will 'buck' when you run down the road. It'll still get up to 50-60mph, though.
I thought it might be the coil but I'm not sure and don't have a lot of money to just start changing out parts on it.
Any help or suggestions would be great! Thanks!
Jan 10, 2011 at 9:59 PM
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WRENCHTECH
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Is it fuel injected or carburetor?
Jan 10, 2011 at 10:31 PM
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REDNECKOKIE
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forgot to add that...it's carburetor. Two barrel, I think. I did check that, the top is closed when I try to start the truck.
Jan 10, 2011 at 10:53 PM
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WRENCHTECH
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Pull a couple of spark plugs and see if they are dark and wet or white and dry.
Test for spark using a spark tester and the plug end of the wire.
Let me know what you find.
Jan 10, 2011 at 10:57 PM
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REDNECKOKIE
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I will let you know. I have to work til friday and will do it then.
thanks!
Jan 11, 2011 at 5:26 AM
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REDNECKOKIE
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Wrenchtech, pulled 3 plugs, all were dry and clean. Used the spark tester, spark was very weak and you could hardly see it. Replaced the coil and tried the spark tester again with the same result. It was in the 50's the past two day, truck started right up, this morning was in the 30's and no go.
Jan 16, 2011 at 6:03 PM
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WRENCHTECH
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That's pretty much why carburetors are obsolete now. You might want to consider installing an engine heater or using some starting fluid for real cold weather.
Jan 16, 2011 at 6:07 PM
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REDNECKOKIE
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any idea why the spark would be so weak? I changed the distributor cap and rotor about a year ago.
I've tried starting fluid and priming it with gas.
It seems the spark is just too weak to ignite the gas when it's cold.
Jan 18, 2011 at 8:05 PM
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WRENCHTECH
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You may not have sufficient battery reserve for the colder weather. The starter will rob voltage from the coil when cranking. The ASD relay may be experiencing a voltage drop also.
Jan 18, 2011 at 8:44 PM
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WRENCHTECH
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Correction on the relay. It doesn't have an ASD relay. The coil is powered by the starter relay during cranking and goes through a resister during run.
Jan 18, 2011 at 8:49 PM
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REDNECKOKIE
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They should be able to test the battery at Autozone, correct?
Jan 19, 2011 at 5:37 AM
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