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I have my #5 piston misfiring in my police interceptor - i bought a new coil pack but cant' see labels telling me which exact spot the #5 piston is at Could any one help me find how or what spot is the correct #5 spot? Thanks in advance
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Try swapping the coil packs around - like swap #1 with #2, and swap #6 with #5, see if the misfires MOVE with the coil packs swapped to the new cylinders or if they stay with the cylinders. If they move with the coil packs, the new coil packs are bad. If they stay with the cylinders, there's a problem with those cylinders. You DID replace that camshaft sensor, right?
I wouldn't worry about the 02 code it will clear when you replace the coils. to be positive that the coils are bad, swap them with another cylinder and see if that cylinder misfires. 90% of the time it's the coil. Let me know
Randy
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.
did you replace only one spark plug? that can cause issues because of differences in resistances between cylinders. also, did the map code stay off after replacing ?
Could be many different things. Take it to a dealership or autozone and have them hook it up to their hand held computer. They will be able to tell you exactly what is wrong. A lot easier then just guessing.
first cylinder 4 is the last on the passenger side . first pull the coil out and check if there is water where the plug is. if there is take the water out and dry up the coil. if you find water you got a crack manifold or a bad intake manifold gasket. if there is no water replace the coil. good luck
take a look at the EGR valve it could be either vacum controlled or electronic either way what seems to be the problem is that the valve is stuck in the open position until the engine warms up you can gently tap the egr valve with a small hammer or a screw driver and you can see that it runs smooth, now if the egr valve is vacum controlled replace the valve. if it is electronoc controlled replace the valve and the module for the egr valve.
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