MacBook Pro (mid 2009) fans are loud and seem fast after a battery replacement
ive done both SMC and PRAM and still the same probalem. Please help.
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Did Apple replace the battery, or did a third-party or you? Whomever did the battery work likely damaged a sensor or sensor wire. When that happens the system mangement controller (SMC) sets fans to high to avoid heat damage.
You can try another SMC reset--sometime it require two:
How to reset the System Management Controller (SMC) on your Mac - Apple Support
If that reset does not restore the fans to normal speed (almost inaudible) then you need to run Apple Hardware Test using instructions in this articele:
How to use Apple Hardware Test on your Mac - Apple Support
It will give a code if it finds anything wrong.