Question about 2001 Hyundai Elantra

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Put on scan and said number 2 misfire. changed plugs and wires. light came back on and engine shakes

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First you will have to make sure that you are getting spark at that cylinder. There are so many causes that will make a car misfire, and the correct diagnostic will save money. Camshaft sensor. defective injectors, not enough compression to that cylinder etc. have it check throughly before investing more money.

Posted on Oct 07, 2010

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scan test for misfire code/s than move spark plug and wire to other cylinders, clear and recheck misfire info, if it moved than replace plugs or wires, if it didnt change, check ignition coil for output, if ok , than check compression, if ok , than check injector circuit with noid light, and measure injector impedence, if ok back pressure test exhaust for plugged cat.

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Check engine light comes on .code says #4pistion misfire,engine is shaking


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Sep 16, 2011 | 2001 Ford Escape

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Missing,viborating


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 vibrating 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
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P0304 - Cylinder 4 misfire detected
P0305 - Cylinder 5 misfire detected
P0306 - Cylinder 6 misfire detected
P0307 - Cylinder 7 misfire detected
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Jun 23, 2011 | 2009 Ford F-150

1 Answer

Vehicle missing,shaking,engine light comes on


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

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1 Answer

My 1999 Buick Century Custom began to shake when i turned it on, it seemed to stop or i didnt notice it as much when I picked up speed, but when i slow to take corners or back up it shakes. The service...


Okay, this sounds like its misfiring, the engine light is on because the computer sees a problem, if you have the computer scanned it will tell you where the problem is, for example it will give a code and say cylinder 2 misfire.autozone will scan for free, if its a misfire i would start with a tune up , spark plugs ,sparkplug wires and air and fuel as needed, then see how it drives from there, the light can be cleared at autozone also, if it still picks up a misfire then depending on the cylinder you may have a bad coil pack also, there are three packs one controls two cylinders so depending on the cyliner misfiring thats the coil to replace, they should be labeled but if not just follow the wire to coil from cylinder, they are as follows, rear cylinders from left to right are cylinders 135 the front 246, hope this helps.

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1 Answer

2001 PT CRUISER MISFIRE CYLINDER 2


Do you know how check the engine codes? Turn the key 3 times and the codes will be displayed where the odometer number is displayed.
If the code is 302 it is spark plug mis fire.
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I have a mazda protege 2003 and my car stinks like rotten eggs when i put on the gas and on top of that, my engine light is blinking and my car shakes when i stop at a red light!


i have a 2003 mazda protege. this is the third time my check engine light has come on. the first time the car started to shake when i stopped at a light and the check engine light came on. i had a readout done and it said misfire. i took it to a garage and they changed my spark plugs and wires. 2 weeks later it came on again and my car started to shake whenever i stopped. readout said misfire. they fixed the coils. it has been 2 weeks since then and my car started shaking again whenever i stop and the light came on. what could possibly be wrong with it?

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2 Answers

Service engine soon light is flashing


When the light comes on without flashing, it just means an emissions problem, when it starts to flash it has become more serious. I suspect that there was an error putting the plugs and or wires. That computer can determine if there is a misfire and it will put out a P040X, code where X represents which cylinder is the problem. This will help you not have to take each one apart. If there are more than one, check each number.

Ex. P0401 means there is misfire on cylinder number 1

P0400 is a random misfire detected.

If you take it to an Advance or Autozone they will usually scan if for free.

By the way, if you used cheap plugs instead of platinum plugs that could do it too.

Hope this helps.

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1 Answer

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Jan 29, 2009 | 2003 Volvo S80

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