i tmakes the car judder a i and the engine misfires
Number 1 cylinder is not firing properly probably a bad coil pack or a bad coil depending on the engine
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It could.
1) Have vehicle scanned to determine which cylinder is misfiring 2) Does vehicle have C.O.P. (coil on plug)? usually a bad ignition coil on that cylinder 3) Remove spark plug from that cylinder and do a compression test to determine if problem is internal to the engine (bad valve or ring).
it was bad
Bad plug? Bad wire? Bad piston or valve (do a compression test)
Bad wire, crack in the power pack by number 1 cylinder, bad sparkplug, oil down in the spark plug tube
most likely bad o-rings or injector
cylinder 1 misfire, is probably a bad ignition coil, it plugs into the spark plug as a coil wire unit, if you have a v6 your #1 cylinder will start on the passenger side and #6 will end on the driver side if its a 4 cylinder #1 will be closer to the radiator and 4 will be closer to the front window, bad coil causes loss of power, and just a shakey ride, it can easily be replaced and cost about 30.00 bucks also think about changing your plugs while you're at it.
Bad spark plug Bad plug wire Burned valve Bad piston Do a compression test to see if the problem is engine internal
It could be a number of reasons such as, A bad spark plug, A bad spark plug wire, A bad distributor cap and rotor, A bad fuel injector, A bad valve,
Bad Plug or coil pack.