96 sidekick, starter cranks continuously

Problem: just installed a "used" but known working remote starter. Testing installation; no problem with key start but testing remote start  engine starts as it should but starter circuit does not open after engine has started !!!!!

Installed Command Start model CS290i in 96 SIDEKICK SPORT !

My exact problem is when I start remotely; engine starts but the START CIRCUIT("Orange" on RS),   has been connected to ("BLACK/ Red" in ignition switch harness) does not open circuit once the engine has started!

If I momementarily interupt RS (chassis ground "green wire") the start circuit opens but RS senses a tamper  and shutsdown the engine!!!!

I tested actual BLACK/ Red wire in ignition switch harness and confirm it is start circuit but do I need a diode or relay of some kind? I decided to check voltage in circuit but it definately appears the +12 volt start signal from RS is remaining on after the engine starts! What's up with that????

I was wondering if it had something to do with tach reference signal not recognized; presuming possibly the RS doesn't sense  engine speed so it continues to crank! This is the second Suzuki with similar problem; different RS system, identical vehicle configuration and same problem symptom! 

Confused what to try as I can't run this RS without tach signal reference but I'm looking for experienced advice; could my problem be corrected if I wired tach signal (- negative input "white" on RS ) wired directly to injector???

I had it connected to what I thought was a tach signal! I don't know for certain but it is a negative input signal I need for the RS to function! If I use an injector signal at the computer which I haven't tesed the circuit yet but it looks like it would be a positive signal at pin #13 in connector #  E33 of the ECU.

This vehicle had an aftermarket cruise control which wworks and I found a tach signal lead for the cruise wiring; I then figured if the cruise works then I could just splice into the tach signal wire under the dash an I'm done.... no so easy!

If the RS responds to command to start from remote I was kind of thinking I likely wouldn't have to change anything since it was originally on a four cylinder vehicle before.

I'm almost positive it has something to do with the tach signal somehow but just not sure I can figure it out before I lose my hair!  

It is unitized coil packs at each cylinder; I think you all helped find the solution to both actually but as I understand I will have to reprogram with single cylinder option.

I get a reprieve for a few days so I will post the result sometime next week before I get back to it!

Thanks you very much for the great info!!!