Question about 2000 Plymouth Neon

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My 2000 neon has misfire in cylinder 1 and its not the coil pack wires plug or injectors

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Hi

Misfires are caused by Fuel, Spark, Compression, or timing.

Fuel - Dirty fuel injectors a possibility.
Spark - Plugs, Wires, Coil
Compression - No compression, poor bang.
Timing - Cam/Crank sensors.

Is it a dead miss or sporadic event? Try some good fuel injector cleaner such as Redline Oils SL-1 or Chevrons Techron. If it still misfires then its not plugs wires or coil it could be ignition modular its under the coil packets

Let us know if you have something more to know else accept the suggestion.
Thank You for contacting Fixya.com

Posted on Jul 31, 2010

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What would cause a misfire of #1 cylinder on 2000 ford expedition 5.4 liter engine?


these have a problem with coil packs and ignition wires. check the plug it may need replacing, but change all the plugs not just the one. you could have a dirty or a bad injector for that cylinder or even a vacuum leak at the intake for that cylinder. something else is you could have poor compression on that cylinder.

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It has a misfire ,we changed the plugs and the coil pack and wires still has a misfire what else could it be


Gas or compression. Check the injector circuit on 1 and 3. Are they pulsing, to put gas in the cylinders? Do a compression test to rule out loss of compression as cause for the misfire.
Kind of odd it would be 1 and 3, but that is one right after the other in the firing order of 1-3-4-2...so, you have a single coil? So you have a distributor-examine closely the distributor cap and rotor if those were not changed too, with the plugs and wires. Look for damage, little black tracks that indicate shorting of the spark, maybe damage at the electrode tips on the inside of cap on 1 and 3 plug wire towers. Most people change the cap and rotor when doing the plugs and plug wires.
Just a possibility also, that the injector ground wires for 1 and 3 might share the same ground. That is to say, they might splice together before going to the computer where the computer internally grounds injector circuits to cause pulsing. Well, those are my thoughts, good luck. And let me know what you find, always interested.

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Fire it up at night and look for arcing in the dark. It may also be nothing more than number 1 plug wire misrouted in a way that inductively picks up energy from one of the other coil packs or cylinders. It should cross other plug wires only once.

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