2005 Chevy Trailblazer Remote Start

I just got done installing a Crimestopper RS830 remote starter using a GMDL-BP bypass in a 2005 Chevy Trailblazer. SOMETIMES when I do a remote start it will start, run a couple seconds, shut off, start again, run a couple seconds, shut off, start 3rd time and continue running. I had it do that once (when it had to try three times) and a couple other times when it got it on the second time.. I also had some remote starts work fine on the first shot.. Any ideas? Could it be that I didn't hook up a tach (using "smart tachless"). Thanks

Hook up tach....the smart tachless isn't reading the engine running.

Why does it work sometimes then? I bunch of times it's started on the first try and kept running.

Where is the tach located? Thanks!

Read the directions for tachless mode. Drain off the extra power in the car then do a tachless or Hook to an injector. the wire that changes color on every injector is the wire you need.

tan(arm) This is the door pin wire you should pulse it the same time the door locks to arm the F/alarm......The disarm wire is lite green in the door or boot