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  #1  
Old 04-02-2011, 01:34 PM
tomjrun tomjrun is offline
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Default thump noise

hey guys, I just bought a new ranger not too long ago and i got around 6k on it and i'm hearing a thump every once in a while from the engine bay. It's not that loud but when it does happen, it makes the thump every two minutes or so and the rpms go up when it happens. I only notice it when i am at a idle or going at slow speeds. If i had to make a guess maybe it could be a sensor acting up. Besides that truck is running great without problems. Is this something i should be worried about.
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  #2  
Old 04-02-2011, 05:09 PM
FX4OR FX4OR is offline
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Default Re: thump noise

could it be the a/c compressor cycling on and off? it thumps when it kicks in, and can raise the revs a tiny bit.
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Old 04-02-2011, 06:12 PM
FordDude1991 FordDude1991 is offline
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Default Re: thump noise

do you have it on defrost at the time?
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  #4  
Old 04-03-2011, 07:56 AM
tomjrun tomjrun is offline
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Default Re: thump noise

well i dont use the ac because it's still cold up here in canada and i do use leave on the window defrost sometimes
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Old 04-03-2011, 08:05 AM
Jimmeh Jimmeh is offline
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Default Re: thump noise

Your AC compressor will still kick on and off. That is most likely the sound you are hearing.
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Old 04-03-2011, 08:55 AM
FX4OR FX4OR is offline
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Default Re: thump noise

yeah, defrost uses the a/c compressor to dehumidify the air it puts into the cab. that's how it gets rid of the condensation built up in there. That's probably what it is, nothing to worry about.
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Old 04-03-2011, 08:56 AM
TerrenceStuart TerrenceStuart is offline
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Default Re: thump noise

it's normal, don't worry about it.
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Old 04-03-2011, 06:24 PM
tomjrun tomjrun is offline
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Default Re: thump noise

thanks guys, i lefted the window defroster off today and no noise. I am just shocked that it was so loud. Now that i think about my old car did it aswell but not as loud and not as often
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