Just bought a 1986 Cadillac De Ville. doesn't seem to be getting gas. need to know where the fuel filter is located. It is a V-8 4.1 engine.

catalytic converter fuel filter...ethanol destroys..
air filter...clogged injectors

Could be crankshaft sensor,fuel filter.

Automatic ?? You should be able to unlock the doors from the inside and open them. If someone set the child safety locks you may have to remove the door panels and unlock from the inside of the doors.

The firing order for a 4.1 V-8 is 1-8-4-3-6-5-7-2. Odd number pistons are on the driver's side, front to back and even numbers on the passenger's side front to back. The distributor turns counter-clockwise (backwards) and #1 piston is at 1 o'clock (close to the firewall). Hope this helps.

Ok It Possible to download it.. From LimeWire To do So Type
Exemple ..Download Cadillac Sedan de Ville 1986 Steering Diagram utility ..then take the one you need ...Good Luck

It could be several things.
1. Fan relay, as this controls power to the fan.
2.Blown fuse or tripped circuit breaker, usually both located in the fuse panel
3. Thermostat that tells the fan relay to start based on heat at the radiator.

Each of these need to be verified as working properly prior to any additional troubleshooting.

a fuel pressure gauge to check the pressure sort of a special tool a fuel filter may cause something along these line of symptoms but it would be at any fuel level for the filter. The only way to really know is the pressure when it happens

change fuel filter and check fuel pressure.sound like low fuel pressure problems.

If the old fuel jelled the system will need a thorough flushing for starters and replace the fuel filter .

Sounds like your talking about an engine air pump. If so and its not belt driven then it will run while the engine runs.