This may sound stupid but I have a quick question. On the eclipse I bought it already has a viper alarm installed my question is why is it when i lock it sometimes and unlock it will churp and let me know and sometimes it wont make any noise at all. What is causing this?

you might be hitting the "aux" button before you hit arm or disarm on accident. Usually with DEI alarms if you hit "aux" then the arm/disarm button it will arm/unarm silently.

Yep, that or you have a bad wiring conection to the siren. Possibly even a siren thats going bad. Look at your siren and how its mounted. If the cone of the siren is pointed up, then water and moisture can build up in there and make them go bad...

13.5 @108 MPH-2.2 60ft(stupid FWD!)
S16G @ 18 PSI/FMIC/Running on MegaSquirt II (Now with sequential
fuel injection)
My webpage: http://eclipsed4evr.home.comcast.net
-1998 Mitsubishi Eclipse RS-T- "Toy"
-1992 Plymouth Laser Turbo AWD(SOLD)
-2000 Honda CR-V(daily)

On some alarms even when set to "silent set" they chirp when you come back to unlock them because they were set off while you were away.........maybe this helps maybe not but hey

Greg
'99 Black GS-T MT

Defi D-Series Boost Gauge, ExtremePsi Intake, Greddy Type-S BOV, Hallman Evolution MBC ... 3" Thermal R&D Exhaust soon