Hello i have problems with Random misfire on my type r...
I have replased sparkplugs and gasfilter, distributor, and made a valv clearance, but it still turn the mil lamp on...what could be wrong??
(excuse me for the bad english :-) please help me.../Christian
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you have a random misfire. and you have just one coil that controls the spark. you have a bad coil it is in the distributor. you can just replace the coil and ignition control module or the hole distributor. I see a lot of them in my shop. It is easier to just replace the distributor
Random misfires usually happen when the spark jumps from one wire to another out of sequence. The cause can be bad wires or you can have a cracked coil-pak. The coil-pak can be bench checked at some autoparts stores. Another possible problem is the Crankshaft sensor which lets the engine know the position of the crankshaft before firing the sparkplug.
Sometimes you can observe the wires arcing when the engine is running in the dark. You may also be able to mist the engine with water using an old spray bottle. The wires should be well enough insulated to withstand the extra water and if the wires don't they need to be replaced.
The Code for a Random misfire may eventually set to the problem sparkplug wire or plug. Even knowing which side of the engine is causing the misfire can help to narrow down an individual coil-pak or wire.
REPLACE DISTRIBUTOR CAP AND ROTOR REPLACE SPARK PLUGS AND WIRES IF NOT BEEN CHANGED IN LONG PERIOD OF TIME.CHECK IGNITION TIMING.CHANGE AIR FILTER CLEAN FUEL INJECTORS.IF ENGINE STILL MISFIRE IGNITION COIL IS WEAK OR YOU HAVE LOW CYLINDER COMPRESSION.
random misfire can be due to bad sparkplug wires or a vacuum leak at the intake, there are many thing that can cause a random misfire even low fuel pressure, and last would be dirty injectors. i would start by having the fuel pressure checked and then having the injectors cleaned.
P0300, this is random misfire, or more than two P0135 02 heater circuit malfunction
you need to address the random misfire, it can be a vacuum hose leak a sparkplug wire, or even sparkplugs getting its useful life, as for the P0135 it detecting the engine condition and seeing lean signal as misfire occurs
This is a misfire with you car. The problem will be in 2 places if the disributor cap is bad youll see what they call ,spark flash, In the rotor this cap has to be in a set position and it has a tendeny to ge displaced and that will have to be replaced., The sparkplugs as it connects to the cap may spark flash over and at idle you can see it. Now at the sparkplug wires they go it to the valve cover and the valve cover leaks oil into the sparkplug boot. This can cause a misfire.What you need to remedy the situation is a tune up with a new distributor and cap and rotor with new sparkplug,
To my knowledge, random misfire could be described as failure of any of the sparkplugs to fire in an unpredictable manner. A misfire is any of the plugs not firing but in a given time period, predictable. Random misfire on the otherhand comes and goes, sometimes it misfires, sometimes not. This is often an indicator of a loose electrical problem which is intermittent in nature.
The error code P0300 pertains to the above described random misfire or in some instances multiple misfire. The last
digit (except when zero) wold points to which cylinder is not firing.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.
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