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i have an 89 civic lx 5 speed and have been having some issues with is and want to make sure thats what it is before i spend the money when i got the car the pump was not getting power so i dropped the tank to see if was the pump and i open it up and there is a wire loose on the pump (i tighten) and hook it up to the battery and worked so i put it all back together and no power to pump again i get a test light and the 4 way connector under backseat was not getting power so i ran a switch and a fuse to pump and has been working fine.

But now sometimes when i turn the pump on it it wont make any sounds till i go under and smack the bottom of the tank and then it will start priming and now sometimes its a nice pump prime sound and othertimes its sounds like a dam mini air compressor and having a rough time getting it started but evertime i have to hit the bottom of tank to get any sound out of it and only the bottom of tank will work to get it to start makin noise. and i have 3 new main relays so i know its not that

 
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Sounds like you are having an issue with the pump motor.

 
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Ya sounds like there's some trash in it or its just time to replace it. Older chevy trucks were bad about that too

 
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Ok thank you imma just replace it and ill post the results

 
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One more question will it hurt the pump in any way being on a switch as in the life and performance of the pump?

 
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Not sure but if you follow the wire you can fix it. Might be a broken wire that's making no connection or a damn squirrel or mouse chewed the wire. It's not hard if you have a power probe, short finder.