Almost impossible to start when it rains - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 03-02-2010
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Almost impossible to start when it rains

Hi I have a 2003 Ford Ranger. It is almost impossible to start when it's raining or real damp outside. I looked for any wet areas etc. under hood. Haven't found anything that looked out of the ordinary. It starts fine any other time. I was wandering if anyone else has had the problem.Thanks for any help.
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Old 03-03-2010
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your spark plug wires are shot
the moisture is allowing the electricity from the wires to arc to the nearest ground

replace your wires with new 1`s
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Old 03-03-2010
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Also your ecu is in the cowl the shielding around it might have cracked and water could be getting in there
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Old 03-03-2010
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Also check your distributor for any cracks or gaps on side where moisture can get inside. My old Ranger had a tiny crack in the side of it and when ever it was really humid out or rained it wouldn't start also.
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Old 03-03-2010
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Thanks guys for the help.
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Old 03-04-2010
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he has triggerless ignition
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Old 01-04-2015
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I have the same problem on my 2005 4.0, still trying to figure it out
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Old 01-04-2015
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pull off the air filter cover and check the air filter for water dampness

or even to see how clogged up the filter is with dirt , or road salt particles

how long since you have had the throttle body thoroughly cleaned out
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