Set your lsn back to factory settings and try again , but this time tune the hsn , get it so there is a nice trail of smoke , warm the engine up before you start to tune , keep running it up and down and each time adjust the hsn 1/8 of a turn , keep adjusting it till you see no more top end and nice trail of smoke once you have done that slighy richen it up ,
Now you have the hsn set try the lsn and with a full tank once again warm the engine up and this time run it up and down and then come back and stop and let it idle for 8 second and then full throttle , if it boggs while trying to pull away then lean it slighty and run it up and down and back again and do the same let it idle for 8 seconds then full throttle , you should notice its better off the line , keep doing it till it shoots of and has smoke coming out of the exhaust , when the car shoots off like a rocket once again slighty richen it up and your car should be set , let it cool down and then another full tank and drive it like you stole it and after 5 minutes check your temperatures ,