took my viper alarm out of my sunny gti today to stick in RS i hope to get soon, removed all the wires for siren etc, wires into loom for lights and door switches, and then central locking wiring, then removed and reconencted all my ignition wiring

i then turned car on, it started but idled very lumpy then cut out, i tried again, gave it some revs and it now limits at 2500rpm

any ideas what on earth i have done?