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4a31 egine black smoke and sound like misfire why? coil is ok. spark ok beck ok combression ok.

I chek combression. spark.coil.beck.

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I have a smart man 450 model is 1p65fu no spark, replcd sparkplug and tested for continuity it's ok, what else can I do

did you replace the plugs themselves or the beck/arnley head (instead of distributor and wires, has big thick individual direct ignition coil...) the direct ignition coil will burn out after a while. Were you getting a lot of misfires previous to complete failure?

Could be the coils... they are like $90 each, but there are only 3 at least...

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What trouble code is P0300

The code indicates a "random misfire." It means the egine is occassionally misfiring. Often it is due to worn spark plugs or a defective ignition coil that no longer produces a strong spark.

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My 06 Chrysler 300C has a P0301 misfire. How do I fix it?

im having the same issues! i have 2007 chrysler 300 i changed all 6 spark plugs and the coil pack on cylinder 1! my check egine light is still on! dont no what too do now!

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Ok, my 2000 acura 3.2 tl egine light blinks and the tcs light stays on, also the engine has a slight shake at idle. Took to autozone to get the codes came back as all 6 cylinders misfire, multiple misfire,...

This is strange. The tcs is a traction controll error. If you are getting misfire codes and traction control warnings, then I would have your control module tested to make sure it is not having intermittent power issues to each component.

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Jimny . misfiring

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I have a hyundai elatnra 99 with 115k miles on it. in the morning or after work when the car is idle for a long time and I start the car it make the sound of missing and then in few seconds its ok

sounds like u have an engine misfire .probably due to worn tune up parts. if u have individual coilpaks on top of each sprkplug, then u need to get ur chek engine light scanned to find which cyl is at fault, then most common issues with these systems are the coils on top of the cylinders.they start to fail intermittently and eventually fail altogether causing a misfire that wont go away. i would get a free chek eng code pull at autozone or pep boys they do this for free then ucan decide which coil its gonna need along with ur plugs and boots for all ur coils to solve this issue .good luck

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My vitara p reg 2L started smoking on start up, now it is misfiring any ideas where i start, I can't see any spark plugs in the engine-maybe i'm blind or stupid

Many new cars hide most of the engine underneath plastic covers that must be removed to find anything. The smoking problem may or may not be serious, but it's likely that the spark plugs will show black oily deposits on the interior insulators. Cleaning or replacing the plugs will usually make the engine run ok for awhile, but with continued smoking, it will foul the plugs again. If all the plugs are fouled, then look for something like a bad PCV valve that creates crankcase pressure when plugged. Worn out valve seals which allow oil to leak into the cylinders can account for smoking only on start-up. These seals can usually be replaced without pulling the cylinder head. Hope this helps!

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2006 Dodge Quadcab 1500, 4.7L. Ok I have changed the spark plugs & coils, oil, oil filter, and air check engine light is still coming on. Ran diagnostic at store, PO300 coming up (said...

Random misfires are some of the trickiest problems to solve, usually an ignition system problem a bad or weak coil pack or possibly a spark plug wire. If not the ignition system then surely a clogged injector.

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