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My engine light has come on, I put it on a diagnostic at home and the only thing that it read was that I had a cylinder 3 misfire. Would this cause the engine light to come on?
Re: My engine light has come on, I put it on a diagnostic...
Yes this will cause the engine light to come on. If it is no longer misfiring, you will have to reset the engine light. You do this by disconnecting the negative cable for a minute or two and then hook it back up. When you start the engine the light should go out. If the light comes on, then you still have a problem.
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There are a few things that can cause an engine misfire and hesitation. Does your van have a CoP ignition system? (Separate ignition coils for each spark plug) Or coil pack? You may have bad ignition coil(s); that would cause a misfire. If you have a dirty/clogged/leaky fuel injector for cylinder 3, that could also cause a misfire condition. When you replaced all the spark plugs, did you look at the plug from cylinder 3? Did they all look the same? Sometimes you can get clues to what is going on in your cylinder by how the spark plug looks: if it's white or glazed you are running too lean and could indicate fuel injection problem, if it's got burnt oil on it and it's sludgy you may have a leaky gasket or worn piston ring that is letting oil up into the combustion chamber and fouling the plug, causing a misfire. If your check engine light comes back on and it's the same misfire code, have the coil for cylinder 3 checked to see if it's weak or bad. Or you can do a home remedy check and swap a known good ignition coil from another cylinder to 3, reset the code, and see if the misfire moves to another cylinder. If it does, you know the coil is bad. You can pick up an ignition coil for pretty cheap on the internet ($30-$70) if that's the problem and they're simple to install (a pain if they're on a cylinder that's under the intake manifold, but just because you have to unbolt a bunch of stuff to get to it...time consuming but not too difficult). I have a 2001 Mazda Tribute and had a couple of ignition coils go bad, causing misfires. This seems to be a semi-common problem for early 2000's Mazdas.
Code # 301??? That is NOT a valid Diagnostic Test Code (DTC) for the engine control system on a 2000 Mercury Sable.
Assuming that you mean P0301, that is a cylinder misfire code that is identifying number 3 cylinder as the cylinder with the misfire problem. MANY things can cause a cylinder to misfire including spark plugs, spark plug wires or boots, burnt valves, broken valve springs, blow head gaskets, cracked cylinder heads, bad or dirty injectors, faulty injector control circuits, Failed ignition coils...the list goes on....proper diagnosis required.
take it back to the dealer they didnt install the coil or electric distubutor properly because of the misfire its causes o2 sensor to give bad reading .
Diagnostic Test Code (DTC) P0306 is defined by SAE J2012 (REV, DEC 2007) as "Cylinder 6 Misfire Detected".
To put it plain and simple, there is a problem with cylinder #6 in your engine that is causing it to misfire.
Misfires can be caused by several things. One of the things that must be understood is that a misfire is simply one or more cylinders that are not producing the power that they should. - especially when compared to other cylinders in the same engine. The things that can cause this include, but are not limited to: > Ignition system > Fuel delivery system > Fuel injection system > Cylinder compression (which can be affected by many of the things below) > blown head gasket > Burned or bent valves > Vacuum leaks > Faulty wiring > cracked piston or broken piston rings > Restricted exhaust > malfunctioning Powertrain/Engine Control Module (PCM or ECM)
To fix the code, you must first diagnose to determine which of these things is causing the misfire, then repair accordingly.
Diagnostic Test Code (DTC) P0300 has a generic description of "Random Cylinder Misfire". To put it simply, there is more than one cylinder in your engine that has been misfiring. What needs to be done is to (A) determine WHICH cylinders are actually misfiring. This can be done by using a scan tool to view the misfire data and the freeze frame data that is stored in the computer and (B) Perform proper diagnostic procedures to determine the actual CAUSE of the misfire(s).
Misfires can be caused by many things. It could be as simple and painless as worn-out spark plugs that need to be replaced or it could be much more involved and expensive to repair like burned valves or a blown head gasket.
Misfire could be a number of things: a) spark plugs - change them if used over 15K miles - inspect/regap. b) spark plug wires - change them if over 15K miles - inspect c) ECM (electronic control module) - test with HEI (high energy ignition) tester.
The shaking tells me that the engine is running on less than its normal compliment of cylinders - the shaking is produced by the imbalance caused in the engine by one (or more) cylinder(s) not firing at all.
The "Check Engine" light probably is coming on due the the misfire condition. Go to Pep Boys or Advance Auto Pats, where they'll tell you (free) your codes causing the "Check Engine' light to be lit - the code coming from your truck's computer will probably be one or more of: P0300 - Random/Multiple Cylinder misfire detected P0301 - Cylinder 1 misfire detected P0302 - Cylinder 2 misfire detected P0303 - Cylinder 3 misfire detected P0304 - Cylinder 4 misfire detected P0305 - Cylinder 5 misfire detected P0306 - Cylinder 6 misfire detected P0307 - Cylinder 7 misfire detected P0308 - Cylinder 8 misfire detected P0313 - Misfire detected with low fuel
P0300 is a multiple cylinder misfire and is used by all OBD2 vehicles on the road in the USA that is 1996 and newer, P0301 is cylinder number 1..P0302 is # 2 and so on...that tune up may have been needed and parts and labor are expensive..you have a cylinder that is misfiring and the cause must be located..possible causes are intake manifold air leaks..secondary ignition problems..fuel injectors..plugged EGR system if it has one..failed head gasket..burned or cracked valves..I have seen some crazy stuff..you need a tech on that one not a mechanic.
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