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OK MY CIVIC WILL NOT START USUALLY AFTER RAINY DAYS. I HAVE NOTICED THAT MY FUEL PUMP DOES NOT PRIME WHEN THIS HAPPENS. I CHECKED FOR POWER AND HAD NONE, SO I WIRED IT DIRECTLY TO THE BATTERY AND THE FUEL PUMP RAN, BUT THE INJECTORS DIDNT OPEN. THEY OPENED ONCE THE CHECK ENGINE LIGHT TURNED OFF. I HAVE ALREADY REPLACED THE RELAY, AND THE WHOLE IGNITION SWITCH. WHAT CAN BE THE PROBLEM. ONCE I GET THE CAR TO START, IT WILL WORK THE WHOLE DAY WITH NO PROBLEMS????.. HEEEEEELLLPPPPPP

 
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these cars are very bad for fried distributors, check your very carefully, mine had same problems.

 
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My 89 Honda Crx HF won't start on rainy days-OK when it's not raining. I've changed the relay, still won't start. On dry days it starts fine. How do I go about checking the distributor for being "fried" as the other thread stated.

 
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yeh found this thread, congrats. now look in this too.
https://www.civicforums.com/forums/2...its-humid.html

 
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Thanks for the direction to the thread. Real helpful. Should be able to figure out the problem now.

 
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OMFG, did I do something useful in that thread?

 
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Something as simple as a cracked distributor cap can kill the engine when it gets damp.

When it will run correctly on a dry day, try misting a little water from a spray bottle on the cap and plug wires. When it stumbles you know you hit a problem area. Replace parts as necessary.
If you change out a distributor cap, be sure to replace the rubber seal part #13 here:

 
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a huge list of items that could be checked in this case (that's what, 4 cases since last week asking absolutely same thing?) so yes, very useful