Misfire due to failed spark plugs or ignition coil on Mercury Grand Marquis

Bad spark plugs or an ignition coil can cause ignition misfire, which will illuminate the Check Engine Light.

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Average mileage: 133,168 (52,000–189,769)
Engine affected: 4.3L V6
9 model years affected: 1996, 1997, 1998, 1999, more2000, 2001, 2002, 2003, 2005
23 people reported this problem
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Viewing 1 - 10 of 10 problem details
2000 Mercury Grand Marquis 167,988 mi,
Had a stalling problem, that went away, now it chugs and has a misfire, plus gas caused the stalling when I went back to regular it didn't stall, P0304 cylinder 4 misfire.
Had Crack Intake but Replace; Also put new spark Plugs and #4 and #2 coil packs in. but still having skipping issues
2000 Mercury Grand Marquis 150,000 mi,
engine (chugs)misses at times new plugs / fuel filter have not helped
2000 Mercury Grand Marquis 135,000 mi,
Sputters really bad check engine lights on 2 misfires
2000 Mercury Grand Marquis 80,101 mi,
one morning the check engine light went on and the car rode rough. I figured bad gas or fuel filter. 2 miles on the check engine light started blinking. Call to mechanic told me to get the car to him ASAP. Drove 6 miles home going 10mph on the shoulder, praying all the way. Bad ignition coil. He replaced all the plugs. Got off cheap, could have been catalytic converter or worse. Otherwise great highway car.
Misfiring plugs or coils. Advance Auto put a tester on it and said 2 of my coils were misfiring. I am in the process of changing the plugs and all the coils. I found 8 coils online for 125.00 new. The car has 256,000 mi on it
Car shaking. Not sure if it would stop ..engine light on and also flashing.... o feel like its picking uo speed slower ... n car also jumps
When I go up an incline the car skips.
1998 Mercury Grand Marquis 157,000 mi,
Number 2 cylinder misfire
2000 Mercury Grand Marquis 52,000 mi,
Having misfiring from plug number 4. It happen after putting gas in car. It ran great until I filled it up.