1991 plymouth acclaim 2.5, every once and awhile when i start the car, she won't start... there is fire, she won't turn over though, and all of the guages seem to go haywire.... i have jiggled the relays (someone said that is the problem) i have put "iso-heat" in the gas tank (someone said that is the problem) i have checked all of the connections and the battery posts are clean and tight, i have changed the spark plugs, wires, rotar and cap... now the big problem i have is that when i bought it, it didn't have a radio, so i removed a radio from a sister car and am installing it, the colored wires are exactly the same, so i connected each respectively, the only thing i get when the key and lights are turned on, the unit lights up, there is no other power, memory, sound or any indication that the radio works, i have tested the fuses and panel, everything seems to be in good order, but still nothing, i have even tried from scratch and started with a different radio and still get nothing, i think i have a bad wire somewhere, but where and where/how can i find it?

Cars & Trucks - Plymouth - Acclaim - 1991 Plymouth Acclaim