where to place the viper in a 98 civic

where is the best place to put the viper brain for the shock sensor cause i have it mounted to the floor and the shock sensor didnt work... then i removed it and zip tie it down to the ignition harness and still the shock sensor aint working when i kick the tires or even shake the car so hard that it seems as if the car was rocking and hitting the ground

Did you adjust the sensitivity on the shock sensor? Depending on the model you are installing, it may come from the factory set to 'off' or very low sensitivity. I usually throw my alarms behind the radio on those cars. The built in shock sensors also generally work better tied to a wiring harness.

i have a viper 5902 and when i go in the adjustment sensor... it has lvls 1-10 or so... is 1 Very sensitive? or is it the other way around?

I believe 10 is the most sensitive. You should be able to test the sensitivity as you are adjusting it from the remote. Start from the highest and work your way down.

10 is most sensitive

i will give it a try tmr and see what happens