is their some kind of sensor that LG4s have, like vacuum sensor or something?
what does it do

 

Please try to phrase your questions better. If no one understands you, you'll never get an answer.

LG4's do have a vacuum sensor. Its called a Differential Pressure Sensor, and works just like a MAP sensor does. However, the readings are inversed. Do not confuse the Manifold Absolute Pressure sensor that most other cars have with the Differential Pressure sensor. Replacing a DP sensor with a MAP sensor (common mixup among parts store monkeys) will create nothing but problems. It will not set a trouble code, but will run terribly and leave you scratching your head. Even a scan tool wouldn't help here. The tool will read correctly, and the ECM isn't smart enough to realize the readings are backwards. Ask me how I know

 

thanks a lot man, that must be why no one ever answers me
ill work on imy wording