Problem with 93 Cadillac Deville

My bro had a 93 Cadillac Deville with I think a 4.9 in it and for some reason if he drives it more than say 30-40 miles it dies and won't start back unless you let it set. Sometimes you can let it set for 15mins sometimes 2 hours. All lights come on but it just won't crank. He said sometimes before it does it, you can be driving and it acts like it ain't getting any gas. That makes it sound like a fuel issue but doesn't explain why the car won't crank once it has died.

Any ideas?

BTW if you think it's a sensor causing the problem could you give me a idea on where it's at and what it's called?

Thx all

Your best bet would be to check for any set computer codes.
Check here for how to check them:

http://myweb.accessus.net/~090/dtcobd1.html

do I have to buy the tester or is it built into the caddy? Or does it show up on the little AC/heat display?

No, it's built into the car. Just follow the instructions on that link.

didn't know that. I'll give it a try once I see my bro again. Thx alot

BTW does the error codes(if any) show up on the heat/AC display?

check the module in the distributor. when they are bad they will cause that problem.

All lights come on but it just won't crank. ..... won't crank once it has died.


Do you mean it won't crank over or it won't fire up?

If it won't crank over, you might want to check the condition of the battery cables and connections and examine the insulation for signs of swelling underneath.

If it dies and won't fire up until it cools a bit, suspect the ignition module as Hawg noted.

When it dies, does it seem the longer it's been running the longer the wait for restart? Again, suspect the module.

He done changed the ignition module I think with no luck. When it dies it acts like the battery is dead and won't crank the engine yet all the lights and stuff still work. Just won't crank to get the chance to fire up.

He done changed the ignition module I think with no luck. When it dies it acts like the battery is dead and won't crank the engine yet all the lights and stuff still work. Just won't crank to get the chance to fire up.

Check the battery cables, especially the positive. for internal corrosion.

Does anyone know if the ODB I testing works on a 92? I have a 92 and I want to see if I can check for trouble codes using the method above.

Does anyone know if the ODB I testing works on a 92? I have a 92 and I want to see if I can check for trouble codes using the method above.

Yes. The OBD 1 I think started in the late 80's.

Correct, but engine codes and info can be accessed thru the a/c control head, check caddyinfo.com for the how to. This thread is way too old and will now be closed.