dei and failed remote starts

Does the Viper 160XVL have an option to try restarting the vehicle if it fails?  I turned on the check engine feature and it is set to monitor through Tach.  The problem is, sometimes the vehicle does not start and it does not try to restart.  It has been Tach Learned twice, that does not help.  I have been noticing the problem with cold starts, seems like the Jeep is not cranking long enough.  Took 5 try's before it would start this morning and it was about 30 degrees out, not cold enough to cause problems one would think.

Couple Q's.

Does this unit have the ability to attempt to restart if the RS fails?  If so, how do I set it?

If I change it to check voltage instead of Tach, what do you reccomomend setting the crank time to, this may help with the failed starts.  Please give your opinions and reasoning.

2003 Jeep Liberty.  160XVL remote starter.

Out of the options you listed the only one that would be applicable in my instance would be excessive RPM.  Here is what happened in order this morning: 1st try, turned over, failed to start and all lights stayed on like it would be running.  2nd, 3rd and 4th try, turned over, started and died within 2 or 3 seconds.  The lights went off and did not try to restart.  5th try, started and ran fine.  The weather was about 30 degrees F.

I see that there is a tach threshold jumper on the unit.  Manual says it may need to be switched off for some newer GM vehicles, does anybody have any experiance with this.  I was thinking of turning it off and seeing what happens.  I also changed the tach learn to about 1800 rpm's, there seems to be no difference when rs it though, still cranks a little, starts and the rpm never even hits 1800.  Sound normal?

Edited this sentance, had it backwards.

Manual says it may need to be switched on for some newer GM vehicles, does anybody have any experiance with this.  I was thinking of turning it on and seeing what happens.

What kind of bypass are you using for your immobilizer?  I've heard of situations where if it's too cold out that the key in the box (556u) can fail.  Again, I've only heard of that situation but, I've never experienced it myself in my years of installing.

Also, did you try to use the check voltage and adjust the crank time yet?  I know that it is better to use tach but, I'd suggest to try the voltage option in the meantime and see what happens.

No bypass required, not a transponder key.  I have not yet set it to voltage, I am trying to avoid that by fixing the problem.