I have a 1995 Crown Vic' that has 102000km, it recently started to sputter and buck a little accelerating, I then replaced the plugs, coil packs, TPS sensor, checked vacuum lines, cleaned MAF sensor and still does a bit but not as bad it seems...what could this be at such low milage?
I have faced the same thing with my car, this is not a single answer to this problem. It could be a bad boot on the coil pack, it could be a improper coil install, sometimes the spring does not sit in well, it could be that the intake manifold is leaking, it could be that the egr valve is stuck, it could the exhaust manifold is leaking, sometimes these issues are not caught by the OBD 2 sensors, you can try to move the coils around to see if that works out.
SOURCE: severe hesitation, bucking
Change the plugs and the rotor insode the distributor. Sounds like your focus has either a hole in the Rotor Button, a cracked rotor button or the plugs need to be changed. Anotehr thing that would make your focus stall, **** and generally be a pain in the **** is: Fuel injectors out of hole; bad fuel injector; bad gasoline; Air filters need changing.
Those are basically some of the things that cause the Focus to jump and ****.
Later db In Tacoma
SOURCE: P0304=misfire in cylinder 4. coil?
not coil coil it wouldnt fire at all it is either a plug or a wire replace the wire and plugs and that will fix it
SOURCE: Ford Crown Vic p0300 random cylinder misfire
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.
SOURCE: bad coil pack on crown vic
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
SOURCE: 2005 Ford Taurus Sputtering
stickingvalves collapsed lifters bent push rods fault ignition or damadged spark plug wires start it up at night look under the hood for sparks jumping from wires replace fauilty wires
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