Dogde Grand Caravan 98 Prostart problem

The autostar worked for my van approx. 7 years, but last winter I got into the problem with it. When I press the button start on the remote control the van is start, then couples second later the engine went off and start again without press the remote, the engine start then off after 3 times, then engine completly go off. I had to use the key to start the van. Could some one help me to solve this problem?

Thanks for you help!

Yes, it has lossed the tach. signal. You need to check that wire and/or relearn it.