my old lx was very, well, i guess jury-rigged is the best way to put it. the po had gotten a dui and had to have a breathalizer hooked up to legally be able to drive to work, it acted as an ignition interuppter, if it didnt like what it smelled, it would ground out the coil. the shop that took it out was stupid enough to just let the ground wire under the dash hanging and strung up to the dash frame, when i went to do the heater core in the thing, i hooked the wire up thinking it was some sort of dash ground. car didnt start for a week and a half untill i realized what was going on.
also, while doing heatercore, i found all the light paddle switches had all been cut and were just electical-taped together. that was a pita to fix.
and, of course the radio was screwed up, it was a pos aiwa without the mounting plate. he just used a couple hose clamps screwed end to end to hold it to the console frame.
now my gt didnt really have any problems, it didnt pass emissions the first time, but a new egr, pcv, and plugs cured that.