Viper 591, 2002 grand prix, issue?

Installed a 591 2 way into a 2002 grand prix. Everything was work before I put the car back together. I put out of the driveway... Hey I'll test it one more time.. Car starts then dies in 15 sec. Trys to start again.. no luck. So i am thinking the Bypass. I leave the key in no good. I then do a daig on the alarm. flashes weak tack or low sense. I check everything again.. samething... trys to start 3 times and stops? So I go inside eat dinner.. Go back outside to test car.. everything ok?? Runs and no problem.  Go to the mall.. for 30 minutes go outside.. same doodie 3 trys and stops?? Next morning get up hit the remote and no issues? Not sure what is going on... Everything was check 3 times over? Are the viper 591 2 way known for problems? Do I have it programed wrong? It seems to work when it wants too? I have reprogramed the tack like 4 times. No sure what the issue is? Any help would be great.

Reprogram the tach, where did you grab a signal?