2001 ford crown vic spark plugs with coil over, want to change plugs but it looks like a fuel rail is in the way..how to change plugs without affecting high pressure fuel inj line. i got a code on my scanner that says 'cylinder 6 misfire', and all the wires going to the coil at 6 look fine. figure if i can just get to the plugs i could start there...but cant even get started

You will need spark, fuel and correct timing. Check the inertia switch in the trunk first. turn off then back on. Take off the plastic engine cover, turn on the key, depress fuel rail schrader valve and fuel should come out WARNING: fuel is possibly at almost 50 psi! If fuel is there, you have fuel. Pressure could be low, but not likely. Does it start now? if no, remove a spark plug coil, put an old correctly gapped plug in it and ground the plug (near the threads). Is there spark? if no, ignition issue, if yes, does it start? If no, reset computer by removing negative battery cable from battery for 3 minutes. Put back on. Does it start? You just have to keep troubleshooting until you have fuel and spark present. It is a remote possibility if you have these 2 things that timing could be off from a timing chain failure. Take #1 plug out *farthest plug forward. Does engine build full compression when the harmonic balancer indicator reaches zero? If yes, it should be running. Other possibilities; Fuel contaminated. Low fuel pressure. Bad or clogged injectors. Bad coils. These are less likely. Good luck to you!

They should be mounted down in the cylinder heads, you'll need to remove each coil pack. A long extension and 5/8in spark plug socket and an extendable magnet will help. Also, you may need to remove the fuel rail to get to move the coil packs.

NO.

I THINK I UNDERSTAND THE SKIP UNDER LOAD,LOL,BUT THIS CAR DOES NOT HAVE WIRES,IT HAS BOOTS,UNDER THE COIL PACKS,AND I HATE TO TELL YOU THIS,BUT,IF IT IS A 4.6 LITER,THEN,FUEL RAIL HAS TO BE LIFTED,GOOD LUCK

had the same thing with my crown vic on the #8 cylinder. changed plugs and wires. still missing. wound up replacing the coil pack. you can check resistence of the coil between companion spark plug towers. ford marks each tower with 2 cylinder #'s. resisistence should be around 10-12 ohms

I would visually check for spark at the plugs, to make sure spark is getting to the plugs. If spark everywhere, use a gage and check proper fuel pressure and fuel injector pulse.
How long since a tune-up? Any applicable trouble codes?

I would try to replace your spark plugs, and spark plug wires, My 88 Vic did the same thing...now it runs like a champ....you could also try fuel injector cleaner.

well if you have checked the spark plugs and they look good then its probly the coil If the plugs have never been replaced i would start with a tune up and see if this fixes the problem. If not there is no good way for you to test it you would need a computer to hook up to the car

These things were replaced on my Crown Vic: The crankshaft sensor and the DPFE(?) sensor; the main cause of the missing, cutting out, etc., however, was due to the fact that the #8 coil had gone bad and was fouling the spark plug. I had to take my car to the dealership before the problem with the coil was discovered. They also cleaned my fuel injectors, but I believe the main problem was the coil and the spark plug. Let me know if this helps!! Good luck!

I also have a 2001 Crown Vic that developed a problem similar to this. It would lope and buck at around 40-45 MPH. I too changed the plugs, then changed the coil boots. It still missed. So I bought 1ea. new coil. After changing the new coil with three old ones, the missing stopped.