400e finding and removing aftermarket alarm?

[88260e]

So I've been hunting down a problem for over a year and now it's so bad I've stop driving the car. The car would die/run rough randomly! It's been to two shops, we'd fine something fix it think we've solved it then it would come back again??? Harness is new eTA was sent out tested and sent back, they said it was fine. New caps,rotors,coils,fpr,plugs,wires,vacuum hoses,coolant temp sensor, crank sensor. Car starts up fine then after 5-10min will run rough bog down, and die, sometimes I can make it home sometimes not AAA!!! Then after and hour or so it will run fine??? Twice now I've got the asr light on then on restart it goes away. I'm lost someone said disconnect the aftermarket alarm they can do funny things. So that's where I'm at now! I love the car but it no use to me sitting in the back yard!!! Need so help once again from the masses

[silverteam]

I would go to your local alarm companies and pick their brain about installing an aftermarket alarm on this model. Go to several places and they are going to give you an idea of where to start.

-Joey