Spark plug gap for 302 engine - 1985 Ford Mustang

MOTORCRAFT SP425 {#ASF52C, ASF52CF4} Plug Material: Copper; Gap: .050"

Spark plug gap? If not sticker on hood or somewhere telling the gap you may find it here. Hope this helps.
http://www.thecarsource.com/fords/engines/302engine.shtml

it is very possible that you got a bad plug wire check and make sure the plug wire is seating right and staying in place

did you properly "gap" the spark plugs? many spark plugs have to have the ends properly "gapped" before installation, by using a "gapping" tool/wheel to properly space the arc gap to the correct distance.

if the plugs were properly gapped, or already came pre-gapped out of the box for your specific vehicle, then you may have air getting into the cylinders around the spark plugs. were you careful to properly tighten the spark plugs straightly into place, or is there a chance that you left one loose, or, even worse, cross-threaded one of the spark plugs?

Make: FORD
Model: LTD CROWN VICTORIA
Year: 1991
Engine: V8 - 5.0L - FI - - GAS

part Number: RS14LC
GAP: .050" (Original Equipment Manufacturer and/or Original Equipment Equivalent)

Hope this helps (remember to rate this answer).

5.0L engine is (1.3mm)
5.8L engine is (1.1mm)
good luck!

The timing specifications for that vehicle with all V-8 engines 302, 390, 428, 429 are the same.

Spark Plug Type: BF32

Spark Plug Gap: .034 In. - .035 In.

Ignition Point Dwell Angle: 27 Degrees

Ignition Point Gap: .021 In.

Ignition Timing: 6 Degrees Before Top Dead Center

Engine Compression: 150 Psi.

Engine Idle Speed:

302-390-428 Engines: 625 Rpm M/T or 550 Rpm A/T

390 GT Engine: 700 Rpm M/T or 550 Rpm A/T

429 Engine: 550 Rpm M/T or A/T

Most 5.0L motors are .044 to .054 Check your engine sticker if it's there. It has alot of information.

it should be .054 however You should always use the sticker under the hood of your vehicle. If for some reason your says .052-.056, then that is what you use. The stickers on the truck will have the most specific info for that truck of anything. I need the year to be more sure, also when you buy the plugs, the parts store can tell you the exact gap.

you ddint specify engine so im guessing its a 5.0 .044 is stock gap for 302's