Question about 1999 Lexus ES 300

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Rx300 missfire on all cylinders - 1999 Lexus ES 300

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Sounds like you have replaced the plugs and have put the lead on in the wrong order heres the firing order incase you have:
rx300 missfire on all cylinders - 92780650.gif

Posted on Jun 21, 2009

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move the ignition coil to another cylinder and see if the miss fire moves. If so replace that ignition coil. If the miss fire stays on that cylinder it is more likely the fuel injector. Was their carbon on the spark plugs when you removed them? This is indicative that the fuel injector is gummed up.

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NEED A SCANNER AND WATCH THE MISSFIRE GRAPH, SHOULD SHOW YOU WHICH CYLINDERS ARE MISSFIRING. ALSO DO A COMPRESSION CHECK.IF ONE OR MORE OF THE CYLINDERS IS WEEK WILL CAUSE THIS ISSUE. MANY THINGS CAN CAUSE THIS SUCH AS POOR FUEL QUALITY, SPARK PLUGS AND OR ONE OR MORE OF THE COILS COULD BE BAD.

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I have a 2000 RX300 that all of a sudden started throwing codes P0300, P0305 and P0306 and at the same time the transmision would not shift into high gear. I know what the codes mean but can cylinder...


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What does the code "misfire on bank 1 mean" on a diagnostic code for a 2000 lincoln navigator mean?


Do you mean "missfire on cylinder 1", code P0301? If so, that means that the computer has detected incomplete combustion in the #1 cylinder, which would be the front passenger side cylinder. There are many potential causes to a cylinder missfire ranging from worn / bad ignition components, clogged / bad fuel injector or even internal engine damage.

However the most common cause, especially on ford vehicles is a bad ignition coil. When trying to determine the cause of a missfire on an engine such as the one in your Navigator i start with removing the plug and checking for carbon tracing, excessive plug gap or contaminants on the plug. If that checks out ok i then swap the ignition coil from the missfiring cylinder to one that isn't. For example, I would swap the ignition coil from #1 to #2 and clear the codes. Then drive around until the light comes back. If it comes back with a missfire on cylinder #2 then you know the cause is the ignition coil and it has to be replaced. If it doesn't then it is something else causing the missfire which will require a bit more diagnostics.

How many miles are on your Navigator? Have the plugs ever been replaced? If you have close to 100k it would be a good idea to replace all of the plugs. Be careful when removing the plugs, it's not difficult to pull the threads right out of the head when removing the plug.

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Check engine light flashing runs rough not firing on all cylinder2000 lincoln navigator with large triton engine Hooked up diagnnostic and it said 1. system too lean bank #2 2. Unable to bleed up fuel tank...


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code 71 means #1 cylinder missfire 72 Means #2 cylinder missfire 73 means #3 cylinder missfire and 74 means #4 cylinder Missfire

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