Where is the number one position on distributor cap a 1987 Cadillac fleetwood 4.1 liter engine?

The number one cylinder location on a 1987 Cadillac Fleetwood 4.1L engine's distributor cap isn't consistently marked in a single, universally understood way. The firing order dictates the placement, but the cap itself may or may not have numbers clearly marked.

To find #1:

1. Consult a repair manual: A factory service manual or a reputable aftermarket repair manual specific to your 1987 Cadillac Fleetwood 4.1L engine is your best resource. These manuals will have diagrams showing the distributor cap and the correct firing order, allowing you to determine #1's location.

2. Firing Order: The firing order for the 4.1L engine is crucial. While I can't definitively provide it without a manual (as it might vary slightly depending on specific engine codes), once you find it (e.g., 1-8-4-3-6-5-7-2), you can use this with the distributor's rotor position. With the engine at TDC (Top Dead Center) on #1, the rotor in the distributor should point to the #1 terminal on the cap.

3. Visual Inspection (with caution): Look closely at the distributor cap. Sometimes, a faint number 1, or other markings, might be present. However, don't rely solely on this; it's often not clear or might be missing.

In short: A repair manual is the most reliable method. Do not attempt to guess the location; an incorrect connection can severely damage your engine.