I own a 1990 lincoln mark 7 LSC. My radio ( am- fm cassette ) is dead I'm loking for a factory am-fm cd radio or a replacement that when installed looks close to factory any suggestions?

i dont think the 94 cars had the anti-theft feature."asking for code"
its dead in all modes, ?
Am/FM , Cassette, or CD
when dead the dial is dead,station scans dead too.
or just audio dead. but seems to be ok
if totally dead, that is a loose or bad Radio fuse
or if not, bad radio. time to upgrade, no?

Some engines had a part called an idle control solenoid. This was a part that controlled the air flow at idle. A loose crankshaft sensor could also do this. Then when you have extreme signals from the O2 sensors, the engine will float from lean to rich and back again.

idle air temp sensor

ABS at the starter relay

If nothings is staying on and the batt still goes dead just sitting. pull the abs fuse, these sys are a problem. the abs pumps stay on and kill the batt. you should here a vib by the master cyc. and you might have a abs light on. remember when you pull the fuse the abs sys will not be working , you will have brakes just not abs. one part to fix it costs around 200.00 dollars the other part is around 1200.00. hope this helps

go to a store were they sell car stero an take your radio an tell them u need a wiring harsent to plug in the radio an plug into the plugs on the car you have dont go to walmart the dont sell them its going to be from car stero store.

This sounds like the PCM has taken a turn for the worst. The pcm relay sends power to the fuel relay for 2 seconds to prime the fuel system just before start up.
Then the pcm ungrouds the signal for a prove out.

under the dash on the left side.

for the temp..check the sensors. your thermostat only controls the water/antifreeze flow. the switch in the trunk may be an engine or fuel tank shut off switch. the speakers' wires may have a short..its also possible that the wires that are connected to the radio may be loose.

Experienced problem after problem with my suspension on my 1990 LSC. Finally contacted "Strut Masters" online and replaced my entire system with a conversion for less than 400 and an afternoon. Installation was simple.