Firing order for 89 grand marquis and were to

In the link

https://www.google.com/search?q=2007+Mercury+Grand+Marquis+firing+order

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Pictures in the link. Text articles and also on the images tab.

https://www.google.com/search?q=1997+Mercury+Grand+Marquis+V8+firing+order

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HERE'S A LINK TO YOUR WIRING ORDER. Specifications Firing Order AutoZone com

Hi...here you go! Please rate my answer...thanks!

Firing order 1-5-4-2-6-3-7-8

Depending on your Grand Marquis's mileage...it sounds like plug wires and plugs...(worn out) and or engine timing/firing order? If plug wires recently changed...the spark plug wires are in the wrong firing order...confirm the firing order from your local parts store by phone...and retrace each one...always start with #1 cylinder...hope this helps.

Try a tune up, distributer cap,rotor,plugs and wires. change the air and fuel filters.

For the 1992 Mercury Grand Marquis 4.6L SOHC V8:

Firing Order:
1-3-7-2-6-5-4-8

Cylinders:
.........(back).......
..|..4..|........|..8..|
..|..3..|........|..7..|
..|..2..|........|..6..|
..|..1..|........|..5..|
O<--Coil packs-->O
.........(front)

Coil:........................Coil:
.(back)....................(back)
(1)...(3)..................(7)...(8)
(6)...(5)..................(4)...(2)
(front).....................(front)

Let me know if this helped or if you have additional information or questions. Feel Free to contact me FixYa.com!

You may have a bad switch or a wiring issue

For the 1998 Mercury Grand Marquis 4.6L V8

Firing Order:
1-3-7-2-6-5-4-8

Cylinders:
........(back).........
|...4...|.......|...8...|
|...3...|.......|...7...|
|...2...|.......|...6...|
|...1...|.......|...5...|
.........(front)

Let me know if this helped, or if you have additional information questions. Feel Free to contact me at FixYa.com!

go this page for firing order, u have 4.6 L V8
http://www.moddedmustangs.com/reference/firing-orders.php